Exploring multicomponent eutectic alloys along an univariant eutectic line
Exploring multicomponent eutectic alloys along an univariant eutectic line
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沿着单变共晶线探索多元共晶合金
DOI：
10.1016/j.msea.2023.145136
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发表时间：
2023
期刊：
影响因子：
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通讯作者：
Liaw, Peter K.
中科院分区：
文献类型：
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作者：
Jin, Xi;Xue, Zan;Mao, Zhouzhu;Guo, Ruipeng;Wang, Xuejiao;Shi, Xiaohui;Yin, Shaochun;Zhang, Min;Lan, Aidong;Liaw, Peter K.
人们认为无序面心立方(FCC)/无序体心立方(BCC)结构多元共晶合金(MCEAs)具有很大的工程应用价值，但目前还没有出现。在这项工作中，我们提出了一种沿着单变量共晶线设计MCEA的路线。在此基础上，设计并成功制备了四种面心立方/体心立方结构的金属陶瓷材料(Cr39Ni37Co8Fe8V8、Cr41Ni39Co10V10、Cr37Ni43Fe10V10和Cr47Ni33Co10Fe10)。Cr41Ni39Co10V10合金的最高0.2%偏置屈服强度为591℃，极限抗拉强度为1076℃，延伸率为10%。纳米压痕试验表明，屈服-强度差异主要是由于面心立方复合材料的强度差异造成的，而体心立方/面心立方强度比R*解释了应变硬化能力的差异。本工作有助于探索具有优异性能的新型MCEA。
It is believed that the disordered face-centred cubic (FCC)/disordered body-centred cubic (BCC)-structured multicomponent eutectic alloys (MCEAs) is of great engineering applications but has been absent. In this work, we propose a route to design MCEAs along the univariant eutectic line. On the basis of this, four FCC/BCC-structured MCEAs (Cr39Ni37Co8Fe8V8, Cr41Ni39Co10V10, Cr37Ni43Fe10V10, and Cr47Ni33Co10Fe10) in Co-Cr-Fe-Ni-V systems with similar lamellar microstructures but different tensile properties have been designed and successfully prepared. The Cr41Ni39Co10V10alloy possesses the highest 0.2% offset yield strength of 591 MPa, ultimate tensile strength of 1076 MPa, as well as a considerable elongation of 10%. Nano-indentation tests prove that the yield-strength difference results mainly from the strength difference of the FCC matrix, while the BCC/FCC strength ratioR*accounts for the strain-hardening capability difference. The current work is helpful for exploring novel MCEAs with excellent properties.