期刊
INTERMETALLICS
卷 136, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2021.107265
关键词
High-entropy alloys; Mechanical properties; Transformation-induced plasticity
资金
- National Key R&D Program of China [2018YFC0310400]
- National Natural Science Foundation of China [U1704159, 51701183]
- China Postdoctoral Science Foundation [2018M630834]
The study focuses on designing a cost-effective Fe65Co10Ni10Cr15 medium-entropy alloy with excellent cryogenic strength of 1.6 GPa and a strain of 56%, demonstrating the highest strength-price ratio among reported MEAs. The alloy's significant strengthening is attributed to hetero-deformation and accelerated deformation-induced phase transformation.
The design of medium-entropy alloys (MEAs) with low-cost and high-performance is a hot topic in the field of metal materials. Here, low amount of Co and Ni element is employed to prepare Fe-Co-Ni-Cr MEA, resulting in a reduced material cost of MEA, which also lead to low stacking fault energy and subsequently promote phase transformation in the alloy system. The achieved cost-effective Fe65Co10Ni10Cr15 MEA has excellent cryogenic strength of 1.6 GPa and strain of 56%, which has the highest strength-price ratio among the reported MEAs so far. The significant strengthening of the alloy is attributed to the hetero-deformation and the accelerated deformation-induced phase transformation.
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