Microstructures and mechanical properties of multiprincipal component CoCrFeNiTix alloys
Microstructures and mechanical properties of multiprincipal component CoCrFeNiTix alloys
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DOI：
10.1016/j.msea.2012.06.075
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发表时间：
2012-10-30
期刊：
影响因子：
6.4
通讯作者：
Shiu, Ming-Hua
中科院分区：
文献类型：
--
作者：
Shun, Tao-Tsung;Chang, Liang-Yi;Shiu, Ming-Hua
研究了Ti对多主成分CoCrFeNiTix（x值为摩尔比，x = 0，0.3和0.5）合金显微组织和力学性能的影响。CoCrFeNi四元合金显示出由简单的面心立方固溶体构造的晶体结构，而在CoCrFeNiTi0.3合金的面心立方基体内观察到由富含（Ni，Ti）的R相和富含（Cr，Fe）的σ相的混合物组成的板状结构。在CoCrFeNiTi0.5合金中，发现了面心立方基体、富含（Ti，Co）的Laves相和R+ σ混合相。加入Ti后，合金的抗压强度提高了约75%。具有高水平的Ti含量的合金具有高屈服应力值和低延展性值。面心立方基体的固溶强化和第二相强化是合金强化的两个主要因素。CoCrFeNiTi0.3合金的抗压强度为1529 MPa，断裂应变为0.60;这表明该材料具有开发韧性高强度合金的潜力。(c)2012爱思唯尔有限公司版权所有。
The purpose of this study is to investigate the effects of Ti addition on the microstructures and mechanical properties of multiprincipal component CoCrFeNiTix (x values in molar ratio, x = 0, 0.3, and 0.5) alloys. The CoCrFeNi quaternary alloy displayed a crystalline structure constructed by a simple face-centered cubic solid solution, whereas a plate-like structure consisting of a mixture of (Ni, Ti)-rich R phase and (Cr, Fe)-rich sigma phase was observed within the face-centered cubic matrix of a CoCrFeNiTi0.3 alloy. In a CoCrFeNiTi0.5 alloy, an face-centered cubic matrix, a (Ti, Co)-rich Laves phase, and R+sigma mixed phases were discovered. The compressive strength of the alloys rose by approximately 75% after the addition of Ti. Alloys with high levels of Ti content had high yield stress values and low ductility values. The solid-solution strengthening of the face-centered cubic matrix and the secondary-phase hardening were the two main factors that strengthened the alloy. The CoCrFeNiTi0.3 alloy exhibited a compressive strength of 1529 MPa and a fracture strain of 0.60; this indicates that this material shows potential for the development of a ductile, high-strength alloy. (c) 2012 Elsevier B.V. All rights reserved.