庄晨雨,程靓,赵伟亮,宋欣钰,操振华

• 1:南京工业大学材料科学与工程学院

摘要(Abstract)：

采用真空感应悬浮熔炼技术制备了(FeNi)_(90-x)Cr_x(AlTi)_(10)(x=15、20、25和30 at%)中熵不锈钢合金，研究了不同Cr含量与均匀化处理对其微观结构与力学性能的影响。结果表明：随着Cr含量的增加，合金的相结构由单相FCC结构转变为FCC/L2_1双相结构；对于铸态合金，Cr含量越低，合金的强度和塑性越高；均匀化处理之后，合金的塑性显著提高；其中，当Cr含量为15 at%时，合金的抗拉强度和塑性分别达到了938 MPa和25.1%,相比铸态的伸长率提升了近150%,展现出强应变硬化行为，具有最佳的综合力学性能；均匀化处理使纳米L1_2沉淀相的体积分数增加，高密度FCC/L1_2共格界面有效阻碍位错运动，纳米共格沉淀强化是导致合金高强度和高塑性的主要原因。

关键词(KeyWords)： 中熵不锈钢;L1_2相;沉淀强化;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52071176);; 江苏高校优势学科建设工程；企业委托项目(LRG-2024-16)

作者(Author): 庄晨雨,程靓,赵伟亮,宋欣钰,操振华

DOI: 10.13289/j.issn.1009-6264.2025-zt12

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