Abstract
AlCrFeNiSi system porous high-entropy alloy material is manufactured by laser ignition and self-propagating sintering of natural chromite powder, which provides the idea of breaking the traditional synthesis procedure of high-entropy alloy compound material. The raw material powder obtained by ball milling is compacted into cylindrical compacts, and the self-propagating reaction comes from the ignition caused by the laser on the surface of compacts, the high-entropy alloy composite of chrome iron powder synthesized by laser sintering, is obtained as well. The raw material is prepared from Al, Cr, Fe, Ni and Si elements with similar effective components of natural chromite powder. The selected chromite powder is energy-saving and environment-friendly, so the preparation of high-entropy alloy by the low-cost short-process can be made for processing for pre-theoretical reserve and process design. The effect of Si content on microstructure and properties of AlCrFeNiSi high-entropy alloy is investigated.
Highlights
High entropy alloys [1] consist of at least five elements, according to the atomic fraction, is greater than 5% and not more than 35% of composition [2]
The high-entropy alloy material used in this paper mainly selects Cr, Fe, Ni and Al elements that are similar to the composition of natural chromite to prepare AlCrFeNiSix series high-entropy alloy by simulating natural chromite powder
The purpose of this study is to explore the effect of Si content on micro structure, phase structure and mechanical properties of AlCrFeNiSix porous high-entropy alloy materials, and to carry out preliminary theoretical reserve and process design for the preparation of high-entropy alloy by short process processing of natural chromium iron powder
Summary
High entropy alloys [1] consist of at least five elements, according to the atomic fraction, is greater than 5% and not more than 35% of composition [2]. Mn. The high-entropy alloy material used in this paper mainly selects Cr, Fe, Ni and Al elements that are similar to the composition of natural chromite to prepare AlCrFeNiSix series high-entropy alloy by simulating natural chromite powder. Besides the energy needed for ignition reaction, it does not need external heat, saves energy, reduces manufacturing cost, shortens the reaction time of self-propagating high-temperature synthesis, and has high production efficiency After reaction, it can obtain high activity metastable production, which is difficult to obtain by conventional technology. The purpose of this study is to explore the effect of Si content on micro structure, phase structure and mechanical properties of AlCrFeNiSix porous high-entropy alloy materials, and to carry out preliminary theoretical reserve and process design for the preparation of high-entropy alloy by short process processing of natural chromium iron powder. It is expected to be applied to the oil storage components, shell, skeleton and other structures in the self-lubricating system of aerospace spacecraft development
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