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Microstructure and hardness of W-25Re alloy processed by high-pressure torsion 被引量:4
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作者 Chen-hao QIAN zi-yang he +1 位作者 Cheng LIANG Wei-xi JI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第12期2622-2629,共8页
The evolution of microstructure and microhardness was studied in a commercial tungsten-25%rhenium(mass fraction)(W-25Re)alloy processed by the high pressure torsion(HPT)procedure under a pressure of7.7GPa up to10revol... The evolution of microstructure and microhardness was studied in a commercial tungsten-25%rhenium(mass fraction)(W-25Re)alloy processed by the high pressure torsion(HPT)procedure under a pressure of7.7GPa up to10revolutions at different temperatures.The results show that the samples processed by10revolutions at room temperature could have the smallest grain size at around0.209μm.High saturation hardness(HV^1200)could be achieved after the rapid strengthening stage for samples processed by10revolutions both at room temperature and at573K.Microstructural observation and analysis from Hall-Patch relationship could reveal that grain refinement and grain boundaries strengthening are the main factors of hardening mechanism in W-25Re alloy.It is also demonstrated that sintered W-25Re sample may have brittle phase separation phenomenon after HPT processing. 展开更多
关键词 high-pressure torsion (HPT) W-25Re alloy MICROSTRUCTURE Hall-Patch relationship microhardness evolution
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