Harmonic Structure Design and Mechanical Properties of High Entropy Alloys
Harmonic Structure Design and Mechanical Properties of High Entropy Alloys
复制标题
高熵合金的谐波结构设计与力学性能
DOI：
10.11330/jtss.59.99
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
飴山 惠
中科院分区：
文献类型：
--
作者：
藤原 弘;川畑 美絵;飴山 惠
高熵合金作为一种全新概念的金属材料，因其优异的力学性能而备受关注。通过控制显微组织来改善合金的力学性能是非常重要的，即使对高熵合金也是如此。调和结构具有以三维网络排列的细晶粒区域和在它们之间排列的粗晶粒区域。谐波结构材料具有优异的力学性能，具有高强度和高延展性。康托尔合金粉末是一种典型的高熵合金，采用机械铣削和火花等离子烧结的方法制备了具有谐波结构的康托尔合金。谐波组织康托合金具有较均匀晶粒材料更高的强度和延展性。此外，它在低温环境中表现出更好的力学性能。阐明了控制变形孪晶对改善谐波结构康托合金力学性能的重要意义。
High-entropy alloys which is a brand-new concept metallic material, have excellent mechanical properties and have attracted a lot of attention. An improvement of the mechanical properties by microstructure control is important even for high-entropy alloys. A harmonic structure has fine grain regions which are arranged in a three-dimensional network, and coarse grain regions which are arranged between them. The harmonic structure materials exhibit excellent mechanical properties with high strength and high ductility. Cantor alloy powder, which is a typical high-entropy alloy, is produced into a harmonic structure Cantor alloy by applying the mechanical milling and spark plasma sintering methods. The harmonic structure Cantor alloy showed superior mechanical properties with higher strength and higher ductility than the homogeneous grain material. In addition, it showed even better mechanical properties in a low temperature environment. It is clarified that the control of deformation twins is important for improving the mechanical properties of the harmonic structure Cantor alloy.