Test Temperature Research Articles

Study on strain localization of frozen sand based on uniaxial compression test and discrete element simulation

Strain localization has always been an important subject in frozen soil mechanics and engineering. To evaluate the development of local strain and the formation of shear bands in frozen soil, uniaxial compression tests have been conducted on frozen sand at various temperatures and particle grades. The strain localization evolution law of the frozen soil is analyzed utilizing the digital image correlation (DIC) method. The test results reveal that the entire process of shear band generation, development, and formation in frozen soil can be well captured. Within the testing temperature and particle grade range in this study, in comparison to particle grade, temperature exerts a more pronounced influence on the shear band angle which increases as temperature decreases. It is discovered that the width of the shear band increases with the decrease in temperature and the increase in mean particle diameter d50. Subsequently, a discrete element method (DEM) model is developed to examine the microscopic mechanical characteristics of frozen sand in uniaxial compression tests. The reliability of the DEM model is verified through comparative analysis with test results. Besides, the development law of the strain localization of the frozen soil obtained by the numerical simulation is revealed based on the quantitative analysis of the rotational angle, bonding state, and displacement of the soil particle during the shearing process.

Irradiation Effects on Tensile Properties of Reduced Activation Ferritic/Martensitic Steel: A Micromechanical-Damage-Model-Based Numerical Investigation

The tensile properties of reduced activation ferritic/martensitic (RAFM) steels are significantly influenced by neutron irradiation. Here, a mechanism-based model taking account of the typical ductile damage process of void nucleation, growth, and coalescence was used to study the temperature and irradiation effects. The elastic–plastic response of RAFM steels irradiated up to 20 dpa was investigated by applying the GTN model coupled with different work hardening models. Through a numerical study of tensile curves, the GTN parameters were identified reasonably and satisfying simulation results were obtained. A combination of Swift law and Voce law was used to define the flow behavior of irradiated RAFM steels. The deformation localization could be adjusted effectively via setting the nucleation parameter εn close to the strain where necking occurs. Because εn changed with uniform elongation, εn decreased with the testing temperature and rose with an irradiation temperature above 300 °C. The nucleation parameter fn increased with the testing temperature for RAFM steels before irradiation. For irradiated RAFM steels, fn barely changed when the irradiation temperature was below 300 °C and then it rose at a higher irradiation temperature. Meanwhile, the ultimate strength of the simulated and experimental curves showed good agreement, indicating that this method can be applied to engineering design.

On the Link between Plastic Wake Induced Crack Closure and the Fatigue Threshold

This purpose of this paper is to examine the relationship between crack growth equations based on Elber’s original plastic wake induced crack closure concept and the fatigue threshold as defined by the American Society for Testing and Materials (ASTM) fatigue test standard ASTM E647-15el. It is shown that, for a number of conventionally manufactured metals, the function U(R), where R is the ratio of the minimum to maximum applied remote stress, that is used to relate the stress intensity factor ΔK to the effective stress intensity factor ΔKeff is inversely proportional to the fatigue threshold ΔKth(R). This finding also results in a simple closed form equation that relates the crack opening stress intensity factor Ko(R) to ΔK, Kmax, and the fatigue threshold terms ΔKth(R) and ΔKeff,th. It is also shown that plotting da/dN as function of ΔK/ΔKth(R) would appear to have the potential to help to identify the key fracture mechanics parameters that characterise the effect of test temperature on crack growth. As such, for conventionally manufactured metals, plotting da/dN as function of ΔK/ΔKth(R) would appear to be a useful addition to the tools available to assess the fracture mechanics parameters affecting crack growth.

Interaction of CsOH with structural steel 316L and simulated products of the steel-cladding reaction under assumed conditions relevant for the accident at the Fukushima Dai-Ichi Unit 2 and 3

A high radiation dose rate under the shield plugs of the Units 2 and 3 reactors at the Fukushima Dai-Ichi Nuclear Power Station (1F), raised an important question on volatile radioactive Cs migration, adsorption and retention on various structural materials during the accident. The high dose rate interferes with decommissioning work. The purpose of this study is to present basic knowledge on contamination mechanisms of a BWR reactor structural materials and post-accident debris by Cs compounds to help decommissioning companies consider the ways of decontamination and debris handling during 1F debris retrieval. Having this goal, a series of tests on CsOH contamination mechanism under assumed accident conditions for Units 2 and 3 was performed. The results may improve the accuracy of estimating the situation inside the reactor from the perspectives of accident analysis and materials’ properties. The test temperature and compounds were chosen based on the probable accident scenario. In particular, Cs adsorption was checked using preoxidized 316L stainless steel, a product of control blade degradation (steel-B4C eutectic) and a product of steel-channel box and cladding interaction (Zr-Fe based multiphase material). Penetration ability of Cs into the oxidized and metallic layers of materials was evaluated. CsOH most probable adsorption temperature range and new Cs containing phases’ formation temperature range were followed.

The effect of nitrogen on the isothermal oxidation of substoichiometric zirconium carbide: Microstructural and spectroscopic investigations

The oxidation behavior of hot-pressed sub-stoichiometric zirconium carbide was investigated through isothermal flow-tube furnace experiments at temperatures ranging from 1000 to 1600 °C. Auxiliary gas composition influence on the oxidation of ZrC0.63 was studied by introducing oxygen to substrates held under either pure argon or nitrogen environments. During furnace ramp-up, prior to isothermal oxygen exposure, nitrogen flow was found to infiltrate the substrate resulting in ZrCxNy formation which provided superior oxidation resistance to the as-received ZrC0.63. Ex situ investigation of ceramic-oxide interfacial regions revealed the presence of carbon precipitate in both material sets at treatment temperatures of up to 1400 °C, along with the presence of the ZrCxOy system. At sufficiently high test temperatures, resulting scale formations for the N2/O2 systems were found to be less porous than the Ar/O2 counterparts, with a higher degree of c-/t-ZrO2 crystallites present at room temperature attributed to nitrogen incorporation into the anion sublattice of ZrO2.

Analysis of ECCC cross-weld creep test data on grade 92 steel

ABSTRACT The UK High Temperature Power Plant Forum have completed a long term cross-weld creep test programme on a Grade 92 steel pipe. This paper describes an analysis of the creep test data. The weld strength factor (WSF), i.e. the ratio of cross-weld strength to base material strength for a specified rupture time and temperature, is shown to be a unique function of a dimensionless parameter S, the creep test stress divided by ultimate tensile strength at the test temperature. The key practical finding is that, since a single universal cross-weld creep life parametric is applicable to all temperatures, long-term behaviour at service temperatures should reliably be predictable from short-term tests at accelerated temperatures.

Conformal Coating Testing in Various Test Environments

Conformal coatings have traditionally been tested by determining the mean time to failure of conformally coated hardware exposed to corrosive test environments. This test approach has serious shortcomings: The test temperatures are most often too high. At these high temperatures, the conformal coating properties may be quite different from those at the application temperatures. In addition, the times to failure are unacceptably long extending into many months. Overcoming these shortcomings is an iNEMI championed test that involves exposing conformally coated thin films of copper and silver to sulfur vapors at 40-50 oC in flowers of sulfur (FoS) chamber and using the corrosion rates of the coated metal thin films as a measure of the corrosion protection capabilities of the conformal coatings. The test temperatures are similar to the application temperatures, the test durations are no more than a week and can be conducted under various temperature and humidity conditions. The purpose of this paper was to determine if testing in the industry-standard mixed-flowing gas corrosion chamber would give similar results as those using the FoS chamber. Acrylic, fluorinated acrylate, and atomic layer deposition conformal coatings were tested in three environments: (a) flowers of sulfur (FoS), (b) mixed-flowing gas (MFG), and (c) iodine vapor. The performance of the coatings tested in the FoS and the MFG corrosion chambers were quantitatively similar. The iodine vapor test results were in qualitative agreement with the FoS and MFG test results. In addition, we present early results pointing to the utility of terahertz-frequency imaging as a technique for measuring conformal-coating thickness nondestructively.

Multiple relaxation behavior of Cf/mullite composites and their electromagnetic wave performance at high temperatures

Reliability and stability of electromagnetic wave absorption (EMA) materials used in high-temperature fields such as aircraft and aero-engines are of great interest. In this regard, the Cf/mullite composites with an opportune heterogeneous interface were fabricated using gel-casting and pressureless sintering techniques. The as-prepared composites exhibited excellent EMA performance with multiple relaxation behavior upon increasing testing temperature ranging from 25 °C to 800 °C (the minimum reflection loss (RLmin) of −62.67 dB with a thin thickness of 2 mm at 600 °C). The results demonstrated that the temperature-dependence complex permittivity with multiple relaxation characteristics plays a key role for the EMA performance evolution. The newly generated Cole-Cole semicircle and κ curves with an increasing number of intersections at zero values suggest that the polarization relaxation is enhanced with rising temperatures, thus improving the EMA capacity. It is believed that the Cf/mullite composite could be a new promising EMA material at high temperatures.

Electric current stressing enhanced damping properties in Sn5Sb solder

PurposeThe purpose of this paper is to investigate the effects of electric current stressing on damping properties of Sn5Sb solder.Design/methodology/approachUniformly shaped Sn5Sb solders were prepared as samples. The length, width and thickness of the samples were 60.0, 5.0 and 0.5 mm, respectively. The damping properties of the samples were tested by dynamic mechanical analyzer with a cooling system to control the test temperature in the range of −100 to 100°C. Simultaneously, electric current was imposed to the tested samples using a direct current supply. After tests, the samples were characterized using scanning electron microscope, electron backscatter diffraction and transmission electron microscope, which was aimed to figure out the damping mechanism in terms of electric current stressing induced microstructure evolution.FindingsIt is confirmed experimentally that the increase in damping properties is due to Joule heating and athermal effects of current stressing, in which Joule heating should make a higher contribution. G–L theory can be used to explain the damping properties of strain amplitude under current stressing by quantitative description of geometrically necessary dislocation density. While the critical strain amplitude and high temperature activation energy decrease with increasing electric current.Originality/valueThese results provide a new method for vibration reliability evaluation of high-temperature lead-free solders in serving electronics. Notably, this method should be also inspiring for the mechanical performance evaluation and reliability assessment of conductive materials and structures serving under electric current stressing.

Stress Relaxation Cracking in 347H Stainless Steel Arc Welds: Susceptibility Evaluation of Heat-Affected Zone

Stress relaxation cracking (SRC) is considered one of the major failure mechanisms for 347H stainless steel welds at elevated service temperatures or during post weld heat treatment (PWHT), especially within the heat-affected zone (HAZ). This work focuses on the characterization of SRC susceptibility within 347H physically simulated arc welded HAZ at elevated temperatures. A four-step SRC thermomechanical test in combination with finite element modeling (FEM) of the welding and testing processes is developed to establish a susceptibility map for HAZ. The test first runs a thermal cycle with three different peak temperatures (1335, 1275, and 1150 °C) to duplicate representative HAZ subzone microstructures, followed by time-to-failure examination under a variety of pre-stress (260–600 MPa) and pre-strain conditions (0.03–0.19) as a function of reheat temperatures between 750 and 1050 °C. With the aid of FEM, SRC susceptibility maps are generated to identify the threshold stress, plastic strain, and creep strain as a function of test temperature. It was found out that HAZ subzone with a lower peak temperature (1150 °C) appears to be slightly less susceptible to SRC than the other two subzones that experienced higher peak temperatures. Generally, time-to-fracture reduces with increasing initially applied stress and strain for all test temperatures. The pre-stress thresholds decrease from about 500 to 330 MPa as the testing temperature increases from 800 to 1050 °C, while the corresponding initial plastic strain thresholds reduces from 0.15 to 0.06. The SRC susceptibility was also evaluated through the Larson–Miller Parameter (LMP) analysis as a function of plastic strain, initial stress and starting stress upon reaching the testing temperature, respectively. The 1050 °C test with a high pre-applied strain (0.1) exhibits an extremely short time to failure (t = 3 s) that lies outside the general trend in LMP analysis. Additionally, it was identified that a plastic strain above 0.07 is identified to significantly reduce the bulk creep strain tolerance to fracture and therefore increases SRC susceptibility. Hardness measurement and fractography analysis indicated that the strain aging of niobium carbonitrides and other potential phases in conjunction with intergranular precipitates contributes to an increase in microhardness and increased intergranular cracking susceptibility.

Reliability Study of Metal-Oxide Semiconductors in Integrated Circuits.

This paper is devoted to the study of CMOS IC parameter degradation during reliability testing. The paper presents a review of literature data on the issue of the reliability of semiconductor devices and integrated circuits and the types of failures leading to the degradation of IC parameters. It describes the tests carried out on the reliability of controlled parameters of integrated circuit TPS54332, such as quiescent current, quiescent current in standby mode, resistance of the open key, and instability of the set output voltage in the whole range of input voltages and in the whole range of load currents. The calculated values of activation energies and acceleration coefficients for different test temperature regimes are given. As a result of the work done, sample rejection tests have been carried out on the TPS54332 IC under study. Experimental fail-safe tests were carried out, with subsequent analysis of the chip samples by the controlled parameter quiescent current. On the basis of the obtained experimental values, the values of activation energy and acceleration coefficient at different temperature regimes were calculated. The dependencies of activation energy and acceleration coefficient on temperature were plotted, which show that activation energy linearly increases with increasing temperature, while the acceleration coefficient, on the contrary, decreases. It was also found that the value of the calculated activation energy of the chip is 0.1 eV less than the standard value of the activation energy.

Corrosion Study on Duplex Stainless Steel UNS S31803 Subjected to Solutions Containing Chloride Ions.

In the present work, the influence of a corrosive environment and temperature on the corrosion resistance properties of duplex stainless steel S31803 was evaluated. The corrosive process was carried out using solutions of 1.5% HCl (m/m) and 6% FeCl3 (m/m), at temperatures of 25 and 50 °C. The microstructure of UNS S31803 duplex stainless steel is composed of two phases, ferrite and austenite, oriented in the rolling direction, containing a ferrite percentage of 46.2% in the rolling direction and 56.1% in the normal direction. Samples, when subjected to corrosive media and temperature, tend to decrease their mechanical property values. It was observed, in both corrosive media, that with increasing test temperature, there is an increase in the corrosion rate, both uniform and pitting. The sample in HCl solution obtained a uniform corrosion rate of 0.85% at 25 °C and 0.92% at 50 °C and pitting rates of 0.77% and 1.47% at the same temperatures, respectively. When tested in FeCl3 solution, it obtained uniform corrosion of 0.0006% and 0.93% and pitting of 0.53% and 18.5%, at the same temperatures. A reduction in dissolution potentials is also noted, thus characterizing greater corrosion in the samples with increasing temperature.

Ratiometric fluorescence temperature sensing of dual-lanthanide MOFs (Eu1-xTbx-BTC) prepared by solvothermal method

A series of bimetallic-organic frameworks (Eu1-xTbx-BTC) have been prepared via solvothermal method by using 1,3,5-benzenetricarboxylic acid as organic ligand, and confirmed by XRD patterns and FT-IR spectra. As x climbs up, the morphology of Eu1-xTbx-BTC evolves from micro-sticks gradually to microspheres with the diameter about 2–3 μm, among which Eu0.1Tb0.9-BTC displays the best luminescence performance under the excitation at 295 nm. Both the emission peaks located at 618 nm and 547 nm are rising with test temperature increasing instead of intrinsic thermal quenching. The fluorescence intensity ratio Δ of Eu0.1Tb0.9-BTC demonstrates a good linear fit in range of 293 K–473 K, combined with the maximum relative sensitivity (Sr) of 0.135%K−1 (293 K) and the temperature resolution (δT) range of 0.099 K–0.123 K. Finally, the five-cycle temperature sensing test proves Eu0.1Tb0.9-BTC has a reliable cycling and thermal stability.

High temperature friction and wear behavior of Mo–Si–B/ZrB2 composites

The Mo–Si–B alloys with good wear resistance are prominent for high-temperature applications. In this work, the effects of ZrB2 content and test temperature on the tribological properties of the Mo–Si–B/ZrB2 composites at 25–800 °C were investigated. It indicates that the composites show an enhanced wear resistance, which can be ascribed to the improved hardness and formation of Zr-rich borosilicate layer by introducing ZrB2 particles. The main wear mechanism is abrasive wear accompanies with adhesive wear at 25–400 °C, where ZrB2 addition can reduce the wear loss. And adhesive wear dominates at 600–800 °C, where the formed tribo-layer can provide a good self-lubricity and is beneficial for improving the wear resistance of the composites.

Realizing BiCuSeO-based thermoelectric device for ultrahigh carrier mobility through texturation

The thermoelectric conversion technology, as a promising renewable energy technology, enables direct and efficient conversion between electricity and heat. In the past ten years, there has been an increasing curiosity towards oxide thermoelectric materials due to their environmentally friendly nature, low cost, and excellent thermal and chemical stability. However, the intrinsic low carrier mobility of BiCuSeO limits its potential to be a high-performance thermoelectric material. Herein, we propose a dynamic sintering approach to enhance carrier mobility of BiCuSeO. As a result, carrier mobility at room temperature of three-step textured Bi0.94Pb0.06Cu0.97Se1.05O0.95 reaches an ultrahigh value of 13.1 cm2 V−1 s−1, which is the highest reported in the conventional doping of BiCuSeO system. Based on the ultrahigh carrier mobility, the power factor of three-step textured Bi0.94Pb0.06Cu0.97Se1.05O0.95 sample could reached 20 μV cm−1 K−2 near room temperature, and the average power factor of 300–923 K could reach 18.0 μV cm−1 K−2, effectively optimizing the electrical performance throughout the entire test temperature span. As a result, we successfully attain a ZT of ∼ 1.5 at 923 K and a ZTave of 0.89 within the temperature span of 300–923 K for three-step textured Bi0.94Pb0.06Cu0.97Se1.05O0.95 sample. Based on the outstanding performance, we have successfully built a 7-pair thermoelectric device based on three-step textured Bi0.94Pb0.06Cu0.97Se1.05O0.95 paired with the N-type two-step textured Bi2Te2.7Se0.3Cu0.01, which is the first BiCuSeO-based thermoelectric device. The thermoelectric device, exhibits a maximum conversion efficiency of 2.8 % at the temperature difference 215 K and simultaneously achieves a cooling temperature difference of 23.5 K with the hot end at 286 K. This work indicates that texturation is an effective approach for enhancing the carrier mobility of oxide TE materials. Besides, BiCuSeO oxyselenide is promising for pollution-free and cost-effective thermoelectric devices of power generation and cooling, thereby offering potential implications for sustainable energy solutions.

A comparative study on the passive film and SCC behavior of Ti-6Al-3Nb-2Zr-1Mo alloy at various test temperatures in simulated seawater

In this work, the electrochemical and stress corrosion cracking (SCC) behavior of Ti-6Al-3Nb-2Zr-1Mo alloy in simulated seawater at various solution temperatures were systematically studied. Results show rising test temperature increases the point defect density in passive film and deteriorates the stability. Therefore, SCC is promoted by localized anodic dissolution (AD). At 25 °C, SCC initiates in αp phase, and β phase hinders SCC propagation on account of the lower electrochemical activity induced by element segregation. While at 4 °C, the SCC propagation rate is higher than that at 25 °C, as the SCC propagation resistance of β phases decreases.

A channel-homogenized micro gas chromatography column for light alkane separation with uniform HKUST-1 stationary phase

BackgroundThe micro gas chromatography column (μGCC) is one of the key components of the miniaturized gas chromatography system. However, light alkanes are difficult to be separated by a micro gas chromatography column, especially for methane and ethane, because the length of μGCC is limited by the area of a silicon substrate. More importantly, the heterogeneous microchannel surface formed by silicon glass bonding causes uneven stationary phase coating and the forces between the untreated microchannel surfaces and the stationary phase materials are weak, which will prevent the improvement of separation performance. ResultsIn this paper, a micro gas chromatography column (μGCC) with uniform HKUST-1 stationary phase is reported. Significantly, an alumina film prepared by the atomic layer deposition (ALD) technique is used to homogenize the heterogeneous microchannels. The alumina is a hydrophilic material and the alumina made by the ALD technique is uniform. The forces between hydrophilic alumina film and HKUST-1 are strong, which can greatly improve the coating uniformity of the hydrophilic stationary phase HKUST-1. The test results show that the μGCC could baseline separate the light alkane mixtures (CH4, C2H6, C3H8, and C4H10) at the high testing temperature of 120 °C. The maximum resolution of the difficult-separated methane and ethane reached 19.2, which is 108 % higher than the μGCC using the same stationary phase without homogenizing the microchannel inner surface. SignificanceThe μGCC uses ALD alumina film to homogenize the microchannel inner surface; meanwhile, hydrophilic ALD alumina has a strong electrostatic attraction with the hydrophilic stationary phase HKUST-1. Homogeneous microchannel surface and strong electrostatic attraction are favorable to obtain uniform stationary phase which greatly improves the separation performance, resulting in a large resolution for methane and ethane. The μGCC has broad application prospects in light alkane separation.

Tensile and Low‐Cycle Fatigue Behavior of Laser Powder Bed Fused Inconel 718 at Room and High Temperature

This study investigates the room‐ and high‐temperature (650 °C) tensile and low‐cycle‐fatigue behavior of Inconel 718 produced by laser powder bed fusion (PBF‐LB/M) with a four‐step heat treatment and compares the results to the conventional wrought material. The microstructure after heat treatment is characterized on different length scales. Compared to the wrought variant, the elastic and yield properties are comparable at both test temperatures while tensile strength, ductility, and strain hardening capacity are lower. The fatigue life of the PBF‐LB/M variant at room temperature is slightly lower than that of the wrought material, while at 650 °C, it is vice versa. The cyclic stress response for both material variants is characterized by cyclic softening, which is more pronounced at the higher test temperature. High strain amplitudes (≥0.7%) at room temperature and especially a high testing temperature result in the formation of multiple secondary cracks at the transitions of regions comprising predominantly elongated grain morphology and columns of stacked grains with ripple patterns in the PBF‐LB/M material. This observation and pronounced crack branching and deflection indicate that the cracks are controlled by sharp micromechanical gradients and local crystallite clusters.

High-temperature dry sliding friction and wear behavior of in-situ (Al3Zr+ZrB2)/AA6016 aluminum matrix composites

Aluminum alloy, a lightweight material, has poor friction and wear properties at high temperatures. Therefore, aluminum matrix composites were prepared by in-situ autogenous method to enhance the high-temperature friction and wear capability of aluminum alloys. (ZrB2+Al3Zr)/AA6016 in-situ aluminum matrix composites were prepared by in-situ reaction with the addition of mixed salts of potassium fluoborate (KBF4) and potassium fluozirconate (K2ZrF6). The materials were characterized by XRD, SEM, and EBSD. The friction and wear properties were investigated mainly by high-temperature friction and wear experiments combined with SEM and XPS. The results show that the wear resistance of (ZrB2+Al3Zr)/AA6016 aluminum matrix composites far exceeds that of their alloys under severe conditions of high temperature. The wear of AMCs first decreases and then increases with increasing temperature. The lowest wear rate was observed at an ambient temperature of 100°C, where the wear rate of AMCs was reduced by a factor of 2.7 compared to that of aluminum alloys. In addition, the enhancement effect of hard and heat-resistant particles was also due to the oxide film generated during friction on the abrasive scar surface layer of AMCs under this condition and the self-lubricating substance (H3BO3). The composite wear mechanism of AMCs was dominated by abrasive, oxidative, and adhesive wear as the test temperature increased.

MODELLING THE STRUCTURAL PARAMETERS OF THE GLUE COMPOSITION AND STUDYING ITS ADHESIVE STRENGTH

The study considers a model of a filled polymer system to analyse the interaction and relationship between its components and adhesive properties. A two-phase system occurs in the filler composition, which forms a layer at the interface with properties different from the bulk properties of the filler and the binder. The system consists of a filler, a boundary layer, and a binder, with their properties accounted for with the accuracy of the manufacturing conditions and the dimensions of the sample. We found that the filler grains shape significantly affects the properties of the system, such as bond strength and water resistance. Distance analysis between filler particles showed that a decrease in its volume fraction in the composition leads to an increased distance between them. We can draw the most objective conclusions after processing the filler particles since, in this case, everything depends on the change of interactions at the boundary (the properties of the matrix in the volume practically do not change). In other cases (for example, in the case of changing the temperature and time conditions of preparation and testing), not only the surface but also the volume properties of the matrix change, and, accordingly, it is usually impossible to conclude the role of adhesion. Its processes are part of the adhesion strength of the adhesive material, so the adhesion strength (also called interfacial strength, boundary strength, and bond strength) has been the subject of constant research for several decades. Adhesion strength is a quantitative indicator of adhesion, i.e., a quantitative indicator of the adhesion forces between the polymer matrix and the dispersed filler as a substrate. While the wetting angle of the edge characterises the process of formation of an adhesive bond, the strength of adhesion characterises the process of its destruction. Knowing the limits of the ‘ideal’ adhesion region can answer the question of what limits to aim for to improve adhesion, but this requires practical measurement of the interfacial strength between the acrylic composition and the filler, which is challenging. As a result, the strength of the composite can be a monotonically increasing function of the adhesion strength, but only in a limited range of values. An increase in adhesion can lead to a decrease in the strength of the adhesive material, depending on the size of the filler particles and the volume fraction of the filler. Adhesion strength is a quantitative indicator of the adhesion strength between the polymer matrix and the dispersed filler. The strength of adhesion affects the strength of the composite material. The ideal adhesion strength depends on the size and volume fraction of the filler. Excessive adhesion strength can lead to a decrease in the strength of the adhesive material. Keywords: polymer-mineral composition, adhesion, cohesion, acrylic glue.