【摘 要】
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Recently,high-and medium-entropy alloys (HEAs and MEAs) have been found to exhibit excellent cryo-genic mechanical properties,but most of them contain high-pric
【机 构】
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School of Materials Science and Engineering Zhengzhou University,Zhengzhou 450001,China;College of P
论文部分内容阅读
Recently,high-and medium-entropy alloys (HEAs and MEAs) have been found to exhibit excellent cryo-genic mechanical properties,but most of them contain high-priced Co element.Therefore,developing HEAs or MEAs with high strength and ductility and relatively low cost is urgent.In this work,novel Co-free FexMn75-xNi10Cr15 (x =50 and 55 at.％) MEAs were developed,which exhibit a good combination of low cost,high strength and ductility at cryogenic temperature.It was found that the Fe50Mn25Ni10Cr15 MEA exhibits a combination of cryogenic tensile strength of ～ 0.98 GPa and ductility of ～ 83 ％.The excel-lent cryogenic mechanical properties were attributed to joint of twinning-induced plasticity (TWIP) and transformation-induced plasticity (TRIP) effects.The present study sheds light on developing low cost MEAs with high performance for cryogenic-temperature applications.
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