Longitudinal Ultrasonic Velocity Research Articles

Elastic and radiation shielding properties of zinc borotellurite glass systems: The impact of gadolinium oxide

Using the formula [(TeO2)70(B2O3)30], this study examines the impact of Gd2O3 on the elasticity and radiation shielding characteristics of zinc borotellurite glass. Glass samples containing 1–5% mol% Gd2O3 were created by employing the melt quench technique. XRD verified that they are amorphous in nature, and the existence of TeO3, TeO4, BO3, and BO4 vibrational groups was revealed by infrared spectra. The structural alterations were shown by the range of longitudinal and shear ultrasonic velocities, which were 3908–4076 m/s and 2222–2277 m/s, respectively. The glass's rigidity was improved by the large rise in elastic moduli, such as bulk (45 GPa), longitudinal (80 GPa), shear (25 GPa), and Young's moduli (60 GPa), with a higher Gd2O3 content. Higher concentrations of Gd2O3 resulted in a rise in the mass attenuation coefficient (μρ), as measured by WinXcom, which enhanced gamma-ray shielding. The half-value layer (HVL) and mean free path (MFP) at 0.662 MeV decreased with increasing Gd2O3 in a consistent manner. The maximum density and optimum gamma-ray shielding performance were found in the glass containing 5 mol% Gd2O3. These results show Gd2O3 for applications needing greater rigidity and better radiation protection by demonstrating how it affects the elastic and radiation-shielding efficiency of the glass network.

Evaluation of Chemical Resistance of Polymer Mortars Containing Biochar

Partial replacement of quartz flour microfiller in polymer composites with biocarbon is one of the potential ways to utilize this waste. The article discusses the possibility of using biocarbon as a component of vinyl ester mortars, in the context of their chemical resistance. The tests were carried out for mortars with different quantitative compositions, and therefore with different biocarbon contents. They were subjected to 12-month exposure to a chemically aggressive environment. Solutions of 0.5% sulfuric acid(VI) and 5% sodium hydroxide were used. Measures of resistance were changes in weight, compressive strength, longitudinal ultrasonic wave velocities and quantitative changes in microstructure compared to chemically unstressed samples. The results show that vinyl ester mortars with biocarbon are more resistant to chemical aggression with sulfuric(VI) acid solution. A significant decrease in compressive strength, ultrasonic wave velocity and an increase in the values of stereological parameters were observed after exposure of the composites in sodium base solution. This is in contrast to the chemical aggression in the acid solution, after which the changes in the properties and microstructural parameters of the mortars were not so clear

Assessment of Weld Microstructure Through Sound Velocity Measurements for Power Plant Applications

This research study employed an immersion-based micro-resolution ultrasonic velocity measurement technique (MUVT) to evaluate Grade 91 (9Cr-1Mo-V) steel welds. This process utilized a 20 MHz focused ultrasonic beam with a spot size of 250 µm, a 6 µm laser vibrometer spot size for detection, and an automated 3-axis raster scanner to accurately collect ultrasonic velocity data from two Grade 91 steel welds fabricated using cold metal transfer (CMT) and flux-cored arc welding (FCAW) processes. By analyzing the MUVT data, the Poisson’s ratio (υ) and modulus of elasticity (E), which are important mechanical properties for weldments, were calculated. The correlation between mechanical properties and ultrasonic velocity was examined. The results indicated that longitudinal ultrasonic velocity could effectively identify base metal, heat-affected zone (HAZ), and weld metal areas, showing a strong correlation with hardness. In particular, the distinctive V-shaped dip in velocity and hardness data across the HAZ areas of both samples highlighted changes in the microstructure of creep strength–enhanced ferritic steel welds. Importantly, the immersion-based MUVT demonstrated high accuracy in small sections of the weld, surpassing the conventional contact ultrasonic testing method in spatial resolution detection.

Influence of BaTiO3 substitution on structural and thermal response of lead borosilicate glass for ultrasonic applications

An extensive examination of the impact of BaTiO3 doping on the mechanical and thermal characteristics of lead-borosilicate glasses is provided in this work. The glass density increases noticeably (from 6020 for BaTiO3 to 2533 kg/m3 for SiO2), and the molar volume decreases, suggesting a denser and more compact structural arrangement. The mechanical properties exhibited a notable improvement upon the addition of BaTiO3. Specifically, the longitudinal ultrasonic velocity (VL) increased from 3927 to 4458 m/s, and the shear velocity (VS) increased from 2317 to 2630 m/s, indicating a reinforced glass network. The bulk modulus increased from 35.71 to 58.06 GPa, and Young’s modulus increased from 57.2 to 92.98 GPa. These significant increases in elastic moduli were attributed to tighter atom packing and higher levels of cross-linking within the glass matrix. Furthermore, the glass structure’s increased rigidity and connectedness were further indicated by the Debye temperature (θD), which increased from 296.8 to 347.3 K. The influence of BaTiO3 on the thermal analysis is demonstrated, which revealed that increasing BaTiO3 content raises both the glass transition and crystallization temperatures. The results of the experiment demonstrate how much BaTiO3 doping can improve the physical characteristics of lead-borosilicate glasses, enabling them to be used in sophisticated optical and structural applications.

(Ge2S8)100-xTex chalcogenide glasses: Physico-mechanical study for NIR optical devices

To better understand the variations in physical, mechanical, and electrical properties, (Ge2S8)100-xTex chalcogenide glasses have been synthesized. These glasses encompass a composition range of 0 ≤ x ≤ 12. The mechanical properties have been studied by determining the longitudinal (νL) and transverse (νT) ultrasonic velocities. A network structure evaluation with composition has been performed via parameters like coordination number (<Nr>), crosslinking density (DCL), glass transition temperature (Tg), etc. Also, the elastic parameters trend values have been associated with the decrease in the cohesive energy value of the system. An overall physical analysis of the Ge-S-Te systems reveals that the system's rigidity and the cross-linking density are decreasing. Within the temperature range of 300–420 K, the temperature dependency of the dark conductivity and photoconductivity has been investigated. The intensity-dependent photoconductivity is governed by a power law, with intensity (Iph = Gδ) with δ lying between 0.5 and 1. The photosensitivity values reveal that the glassy system may be suitable for applications in optoelectronic devices. A correlation among the parameters has been established by calculating elastic parameters and conductivity measurements and evaluating the network structure theoretically. The present efforts clarify the composition-structure dependence and relationship in the Ge-S-Te glass series.

Debye temperatures and nanostructuring of polyurethane auxetics

Based on experimental values of longitudinal and transverse ultrasonic wave propagation velocities and surface Rayleigh wave velocities were calculated phonon energies and Debye limiting frequencies and temperatures were determined of metal-filled polyurethane auxetics samples. Modeling the structural formations of such systems and obtaining the value of the lattice and Grüneisen acoustic parameter made it possible to find the root-mean-square displacement of the atomic groups of the macromolecule, as well as the limits of forced elasticity, shear deformation, and deformation of the interstructural bond. The relationship between Debye frequencies (temperatures) and Poisson's ratio, Grüneisen parameter, was established. A quantum-mechanical approach to the movement of electrons, atomic groups of macromolecules, thermal and sound phonons made it possible to estimate the size of nanoformations in the composition. The theoretical values of Poisson's ratio obtained based on models of polymer auxetics and processes of propagation of ultrasonic waves in such systems are analyzed.

Investigation of physical and metallographic properties of nickel matrix composite by ultrasonic method

Ultrasonic testing (UT) is one of the most widely used non-destructive testing techniques for the characterization and evaluation of materials. In this study, the material properties of AstCrM-BN-Cr-Ti-Ni composites produced by mechanical mixing and electroless nickel plating technique were evaluated using UT. Changes in ultrasonic wave velocity, Young's modulus, density, porosity and hardness are observed in the heat-treated material at different temperatures. Samples analyzed by Scanning Electron Microscopy (SEM) and X-Ray Diffractometry (XRD) exhibited changes in grain structure at different sintering temperatures. It has been observed that the change in grain size also affects mechanical and physical properties according to ultrasonic properties. In conclusion, the experimental results showed a linear relationship between the mean grain size and the UT parameters (ultrasonic longitudinal and transverse velocity, Young's modulus), physical (sintering temperature and density) and mechanical properties (hardness and porosity) of the material. Grain growth occurs with increasing sintering temperature, porosity content decreases, hardness, Young's modulus and ultrasonic wave velocity values also increase.

Assessment of sulphur content in nitrile rubber through ultrasonic measurement

ABSTRACT Ultrasonic testing is a popular non-destructive method for characterising engineering materials and detecting their properties. Diverse quantities of sulphur are incorporated into an uncured rubber compound, which is subsequently cured under specific pressure and heat conditions to attain the desired properties in the final product. The present work represents a quantitative estimation of sulphur content for cured NBR (Nitrile Butadiene Rubber) samples by an ultrasonic approach. The experiments have been conducted using cured NBR samples with varying sulphur content, ranging from 0% to 1.34%. Ultrasonic pulse behaviour at different temperatures (30°C to 160°C) has been observed using an ultrasonic setup which has been developed in-house. A-scan data is obtained at a sampling rate of 80 MHz using an 18 mm diameter broadband transducer with a 1 MHz central frequency. The ultrasonic longitudinal velocity (ULV) of rubber is determined from A-scan data using time-of-flight, and sulphur content has a significant impact on the ULV. At a temperature of 160°C, the ultrasonic longitudinal velocity (ULV) is measured at 1262 m/s for a sample with 0.62% sulphur content, and at 1321 m/s for a sample with 1.34% sulphur content.

Assessment of sulfur content in nitrile rubber through ultrasonic measurement

ABSTRACT Ultrasonic testing is a popular non-destructive method for characterising engineering materials and detecting their properties. Diverse quantities of sulphur are incorporated into an uncured rubber compound, which is subsequently cured under specific pressure and heat conditions to attain the desired properties in the final product. The present work represents a quantitative estimation of sulphur content for cured NBR (Nitrile Butadiene Rubber) samples by an ultrasonic approach. The experiments have been conducted using cured NBR samples with varying sulphur content, ranging from 0% to 1.34%. Ultrasonic pulse behaviour at different temperatures (30°C to 160°C) has been observed using an ultrasonic setup which has been developed in-house. A-scan data is obtained at a sampling rate of 80 MHz using an 18 mm diameter broadband transducer with a 1 MHz central frequency. The ultrasonic longitudinal velocity (ULV) of rubber is determined from A-scan data using time-of-flight, and sulphur content has a significant impact on the ULV. At a temperature of 160°C, the ultrasonic longitudinal velocity (ULV) is measured at 1262 m/s for a sample with 0.62% sulphur content, and at 1321 m/s for a sample with 1.34% sulphur content.

Determination of elastic constants for scots pine wood using ultrasound

Elastic constants of Scots pine (Pinus sylvestris L.) wood grown in Turkey were investigated using non-destructive ultrasound tests. Elastic modulus in longitudinal and perpendicular directions (EL, ER, ET), shear modulus in principal planes (GLR, GLT, GRT) and Poisson ratios (ʋLR, ʋRL ʋLT, ʋLT, ʋRT, ʋTR) were calculated using cubic samples (20 mm) which were conditioned at 65 % relative humidity and 21 °C. Longitudinal and transverse ultrasonic sound velocities in fiber (L), radial (R) and tangential (T) directions were measured using 2.25 MHz and 1 MHz sensors, respectively. Transverse sound wave velocities at an angle of 45° to the L, R and T directions were also measured with a 1 MHz sensor in order to calculate the Poisson ratios. The predicted elastic modulus based on ultrasound in L, R, T directions were 10600, 1300 and 470 N/mm2, respectively. The predicted shear modulus based on ultrasound in LR, LT, RT planes were 1180, 1050 and 350 N/mm2, respectively. Poisson ratios varied between 0.04 to 0.95. Comparing the data available in the literature, elastic constants of scots pine determined using ultrasonic method were within the acceptable values.

Modification of the optical and elastic properties of TlGaSe2 layered semiconductor produced by the memory effect

A comparative analysis of the temperature behaviors of optical and elastic properties of single crystals under a memory effect experimental condition are presented for the first time. A memory effect condition suggests that the sample is thermally annealed inside the incommensurate (INC) phase for a time interval the corresponding physical parameters is measured experimentally. From ultrasound velocity measurements, carried out before and after the thermal annealing process subjected to the sample, the noticeable changes in the temperature variation of the longitudinal ultrasonic wave velocity associated with the elastic constants of due to the memory effect was detected. Our results reveal that thermal annealing performed at the INC - phase has some influence on the optical absorption of crystals in the visible spectral region. We assumed that thermal annealing within INC - phase is accompanied with the appearance, inside samples, a new quasiperiodic frozen structure formed from the intrinsic defects migrated into the lowest energy diffusion barriers of the INC - modulation wave. Such structural modulation is incommensurate with the underlying lattice of and can lead to changes in the electronic band structure and the optical bandgaps of

Phase transformation kinetics in a coarse-grain Ti17 alloy determined by laser ultrasonics and dilatometry

Different methods are used to determine the phase transformation titanium alloys. While ex-situ methods require a large number of samples and accurate quantification of the phases, in-situ methods can provide the kinetics of transformation continuously and with less samples. However, the results are based on the changes of physical properties, and the interpretation of the results in terms of phase transformation are not direct. This study compares two in-situ methods to measure the kinetics of phase transformation for a Ti17 alloy, namely: laser ultrasonics for metallurgy (LUMet) and dilatometry. While LUMet is coupled to a Gleeble® 3500 thermo-mechanical simulator with ohmic resistance heating, the dilatometer device uses induction heating. We performed two types of experiments by heating the specimens above the β-transus temperature (∼ 865 °C) and 1) and then fast cooled below the β-transus temperature and held at different temperatures, or 2) continuously cooled at different rates. The β→α + β phase transformation is inferred by the evolution of the longitudinal wave speed with the LUMet method and by the change in the length of the specimen by dilatometry. We obtained the information about the isothermal phase transformation using the normalized changes in length for the dilatometric data and in longitudinal ultrasonic velocity. In the investigated isothermal temperature range (580 – 700 °C), the β →α + β transformation is completed within one hour of holding with the fastest transformation rates at 580 °C. For the continuous cooling treatments, the small change in length measured by dilatometry makes it impractical to use the lever rule to accurately determine the relative transformation fraction. However, we could successfully apply the lever rule to the LUMet data. Furthermore, the derivatives of the change in length and ultrasonic velocity are used to estimate the transformation temperatures as a function of the cooling rates. Further, the in-situ measurements are supplemented with ex-situ characterization of the microconstituents after heat treatments using scanning electron microscopy.

Backscattering of Ultrasonic Waves as the Basis of the Method of Control of Structure and Physicо-Mechanical Properties of Cast Irons

Increasing the reliability of control of cast iron structure and its physical and mechanical characteristics is an important scientific and technical task of the machine-building industry. The paper studies the possibilities of controlling the structure of cast irons using structural noise created by ultrasonic scattering on graphite inclusions of different shapes. The subject of the present studies was such characteristics of structural noise as amplitude-temporal A(t) and as root mean square value of the amplitude of the ultrasonic waves backscattering field AN, compared with the data on ultrasonic velocity and strength or tensile strength of cast iron samples. As a result of the studies, a significant difference between the amplitude parameters of the AN structural noise obtained for samples with different shapes of graphite inclusions at 5 MHz was revealed for the first time. So, for example, for samples of gray cast iron (Russian: СЧ10, СЧ15, СЧ20, СЧ25), having predominantly plate-like form of graphite inclusions, the value of AN on 14–15 dB exceeds that measured in high-strength specimens of the cast iron with the prevailing form of spherical graphite inclusions ВЧ50 (Russian), etc. At the same time growth of longitudinal ultrasonic velocity amounted to 20–25 %. The method of rejection of gray cast iron from high-strength cast iron according to the data of amplitude parameters of structural noise AN at unilateral and local sounding of the object without using an additional reference signal reflected from its oppositional wall is suggested.

Discontinuity Detection System in Marble: Analysis of the Time-Frequency Characteristics of Ultrasonic P-waves

Abstract This study attempted to determine both the presence and the appearance of the surface of a crack artificially created in a marble block without axial loading or compression by FFT analysis of ultrasonic longitudinal sound waves by scanning the surface. In such respect, the study differs from other studies in the literature. The aim of the study was to minimize marble waste by determining the most appropriate slab cut direction based on the orientation of the fracture or discontinuity within the marble block. During location-controlled scanning of the marble surface, mean longitudinal wave velocity, Young modulus, Poisson ratio and longitudinal wave velocity variation data were obtained using a V-Meter Mark IV™ ultrasonic test device. For each location, longitudinal ultrasonic velocity data was taken at 250 kHz sampling rate and 256 data points were created. Data from the computer environment were subsequently reorganized using the MATLAB software and FFT conversions for such velocity data were obtained for each location. Then, the peaks of the FFT transformation components were determined by using the “Findpeaks” function in MATLAB‘s signal processing toolbox. The number of peaks in the 50-60 kHz range was determined for each location. A single difference was determined between the peak numbers at the locations within the cracked and uncracked regions. By examining the FFT graphs, it was determined that such additional peak occurring in the cracked regions appeared as a second frequency component near the dominant frequency values. Points with secondary frequency were recorded as 1, while all other points were recorded as 0 in a new matrix. Such data matrices created for each sample were examined by visualization in the form of surface graphics. Using these graphics, the orientations of discontinuities within the marble block may be determined according to the scanning surface.

Metrological characterization of the longitudinal ultrasonic velocity of cylindrical rock cores

The correlation of the use of ultrasonic velocity in rock cores has been a fundamental resource in the analysis of geoscientists and rock engineers. The general rule is that ultrasonic velocities in typically heterogeneous materials, such as composites, rocks, and soils, present greater dispersion than homogeneous ones. This behaviour, although expected due to the more significant internal variation in the composition of its matrix, requires the application of a more cautious measurement protocol, mainly for samples with low parallelism. This work presents a metrological measurement protocol to determine the longitudinal ultrasonic velocities of these materials and their respective measurement uncertainties. The evaluation of the proposed protocol was applied to four samples of cylindrical migmatite rocks, each 76 mm in diameter. The frequency used was centred at 500 kHz. The determination of the transit time in each sample was made from the difference between the first internal reflection of the sample and the direct signal from the receiver. Samples with approximate heights of 51 mm, 62 mm, 77 mm and 101 mm were used. Their faces were divided into four quadrants. Measurements were taken around the geometric centre of the part and in each of the four quadrants. Fivedimensional measurements were performed for each quadrant, and ten transit time measurements were for each of the five defined regions. Due to the low parallelism of the parts, a protocol was adopted where the global uncertainty of each part was increased to that of the part with greater uncertainty. From the results of this research, it was noted that the effect of low parallelism tends to increase the dimensional uncertainty measurements and, consequently, the sample measurement uncertainty values.

Nondestructive evaluation by eddy current and ultrasonic technique of 475�C embrittlement effects in dss duplex stainless steels and corrosion behavior

In this paper, a non-destructive evaluation of the embrittlement effect in duplex stainless steel DSS 2205 aged from 5 h to 100 h at a temperature of 475 ° C was performed by Eddy current and ultrasonic techniques, in addition the corrosion behavior was carried out after heat treatment at 475°C. The experimental results show that an inverse behavior was observed between normalized impedance and hardness in aging time at 475°C; when the normalized impedance of the Eddy current probe was decreased, hardness was increased with aging time. The longitudinal ultrasonic velocity and transversal velocity were calculated in this study for each sample. The Young’s modulus and the Shear modulus were computed from the two velocities. The investigation carried out shows a sensitivity of Eddy current and ultrasonic technique to the microstructure changing observed at 475 ° C, due to embrittlement in duplex stainless steel. The effect of heat treatment at 475°C on the corrosion behavior was also evaluated by Eddy current on a long time and revealed the important changing in corrosion resistance due to spinodale decomposition of the ferrite phase.

Enhancement of elastic properties and surface plasmon resonance with the addition of boron oxide to the ZnO−SiO2 glass system

Glass substrates, with their ultrasonic and enhanced Raman signals, are ever-demanding for medical applications. This paper reports the effect of boron addition to the enhancement of the elastic properties and Raman shifting in the Surface Plasmon Resonance results for the zinc borosilicate glass substrate that can be used for optical biosensor applications. Such glasses were prepared by melt–the quenching method and characterized using a densimeter, X-ray diffraction measurement, Fourier transforms infrared spectroscopy, ultrasonic, and surface plasmon resonance spectroscopy. Results from the current study demonstrated how the composition of the glass influences the physical and elastic moduli of the boron-doped zinc silicate series. The physical characteristics of the zinc silicate glasses were predicted to alter significantly after adding boron as a modifier. The glass density decreased from 3392 to 2983 kg/m3 as the percentage of boron increased from 0.10 to 0.20 wt.%, then increased to 3191 kg/m3 at 0.30 wt.%. The X-ray diffraction and Fourier transforms infrared spectroscopy techniques verified the amorphous glass phase. The ultrasonic method determined the glass's ultrasonic longitudinal and shear velocity at a 5 MHz resounding recurrence at room temperature to study elastic moduli. When boron content is added, the longitudinal, Young, shear, and bulk moduli exhibit a decreasing and increasing trend. As the boron content increases and behaves as a modifier, the number of non-bridging oxygen will increase, which will cause the glass network to expand. In addition, the increase in Eopt occurs from 3.4883 to 3.4331 because the sample has a higher number of non-bridging oxygen. The shift for Otto configuration of the SPR results occurs with the increase of boron concentration. The fabricated glass can potentially be used to construct an integrated silicon-based glass substrate for an optical sensor.

Effect of variation of egg-shell particulate reinforcement on ultrasonic pulse velocity, attenuation, and hardness prediction in ceramic-metal composites

In this study, ceramic-metal composite material reinforced with additive prepared from waste egg-shell was produced. Waste egg-shells were cleaned, dried, ground and then sieved. The effects of egg-shell reinforcement ratio (0%, 1.66%, 3.34%, 5%, and 6.66 % by volume) and sintering temperature (1400?C) applications on Fe-B4C ceramic-metal powders were tested. For this purpose, tests such as ultrasonic test, hardness and density were applied to the composite material, and finally, microstructural analysis was performed on the composites by SEM application. The changes in the crystal structure of the egg-shell after sintering were revealed by diffractograms analysis. It was observed that the hardness, ultrasonic longitudinal and transverse wave velocities also increased with the increase in the reinforcement ratios of the egg-shell. Considering the 6.66% egg-shell addition to the ceramic-metal composite mixture, in the light of the numerical data obtained, 5091 m/s longitudinal wave velocity, 2809 m/s transverse wave velocity, 204.12 Hv hardness value, 0.315 dB per mm longitudinal attenuation and 0.214 dB per mm transverse attenuation values with gave the best physical and mechanical properties. According to the test results obtained, it was determined that it would be appropriate to use the egg-shell in the production of composite materials and to characterize it with the ultrasonic test method.

Effect of Nano-Sized γ′ Phase on the Ultrasonic and Mechanical Properties of Ni-Based Superalloy

The effect of the nano-sized γ' phase on the ultrasonic and mechanical properties of the IN939 superalloy was investigated. The results indicate that the microstructure characteristics of the nano-sized γ' phase directly affected the ultrasonic longitudinal velocity, the attenuation coefficient, and the mechanical properties. The ultrasonic longitudinal velocity increased with the volume fraction of the γ' phase, whereas the attenuation coefficient was similar to the fractional change in the γ channel width. The lower fractional change in the γ channel width, in combination with a high volume fraction of the γ' phase, was conducive to improving the mechanical properties of the superalloy. Additionally, the variation in the ultrasonic properties could reflect the variation in the mechanical properties of the IN939 superalloy, which was beneficial for optimizing the heat treatment process and characterizing the γ' phase precipitation behavior in a nondestructive manner.

Structural, physical and ultrasonic studies on bismuth borate glasses modified with Fe2O3 as promising radiation shielding materials

Fe-bismuth borate glass systems of composition; (70-x) B2O3+ 5 Bi2O3+15 MgO+ 5 Na2O+5 Al2O3+x where x = 0, 0.5, 1, 1.5 mol% Fe2O3 were prepared thru the known melting annealing procedure. Some of their structural, optical, physical and ultrasonic properties were measured and interpreted towards gamma irradiation up to 60 kGy. FTIR spectra display vibrations of the main triangular BO3 and tetrahedral BO4 units, BiO6 polyhedral and AlO4 units. The deconvoluted spectra diplay limited changes in the glasses structural units. UV–visible absorption spectra show peaks at∼ 220, 248 and 270 for Fe-free glass with a cutoff shift to ~ 320 and 360 nm for Fe-containing glasses. The UV peaks are correlating to absorption of the triplet Fe3+ ions and trivalent Bi3+ions. Either the optical or vibrational bands obtain an apparent moral stability against gamma irradiation doses especially before 60 kGy. Density, molar volume, optical energy band gap (Eopt), other physical parameters and ultrasonic properties e.g. longitudinal and shear ultrasonic velocities, elastic moduli, microhardness and ultrasonic attenuation coefficient (α) reveal also high stable performance against irradiation process. Presence of the polarizable Bi3+ ions helps in blocking radiation photons passage and Fe2+/Fe3+ enhances the absorption of defect color centers caused by irradiation. Additionally, the condensed AlO4 units provide the glasses structures and compactness. The stable behavior and superior optical visibility of the prepared Fe-bismuth borate glasses properties against ionizing radiation, recommend their promising usage as suitable radiation shielding candidates for protecting specialists and patients in healthcare, dentistry, veterinary and industrial environments.