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Thermal stability of nanocrystalline al-10Fe-5Cr bulk alloy

Transactions of Nonferrous Metals Society of China 2019年第2期29卷 242-252页

作者： Muneer BAIG Hany R.AMMAR Asiful H.SEIKH Jabair A.MOHAMMED fahad al-mufadi Abdulaziz alABOODI Engineering Management Department College of Engineering Prince Sultan University Mechanical Engineering Department College of Engineering Qassim University Metallurgical and Materials Engineering Department Faculty of Petroleum and Mining Engineering Suez University Center of Excellence for Research in Engineering Material King Saud University

Thermal stability of nanocrystalline al-10wt.%Fe-5wt.%Cr bulk alloy was *** initial micro-grained mixture of powders was processed for 100 h using mechanical alloying(MA)to produce nano-grained *** processed powders were sintered using high frequency induction heat sintering(HFIHS).The microstructures of the processed alloy in the form of powders and bulk samples were investigated using XRD,FESEM and *** and compression tests were conducted on the bulk samples for evaluating their mechanical *** evaluate the thermal stability of the bulk samples,they were experimented at 573,623,673 and 723 K under compression load at strain rates of 1×10^-1 and 1×10^-2 s^-*** annealed samples exhibited a significant increase in their microhardness value of 2.65 GPa when being annealed at 723 K,as compared to 2.25 GPa of the as-sintered *** bulk alloy revealed compressive strengths of 520 MPa and 450 MPa at 300 K and 723 K,respectively,when applying a strain rate of 1×10^-1 s^-*** microstructural stability of the bulk alloy was ascribed to the formation of iron and chromium containing phases with al such as al6Fe,al13Fe4 and al13Cr2,in addition to the supersaturated solid solution(SSSS)of Cr and Fe in al matrix.

关键词： nanocrystalline al-Fe-Cr alloy mechanical alloying consolidation thermal stability

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