选区激光熔化打印Al0.5CoCrFeNiTi0.5/316L复合材料的微纳力学及耐蚀性能

doi:10.13251/j.issn.0254-6051.2023.05.010

金属热处理 ›› 2023, Vol. 48 ›› Issue (5): 60-65.DOI: 10.13251/j.issn.0254-6051.2023.05.010

选区激光熔化打印Al_0.5CoCrFeNiTi_0.5/316L复合材料的微纳力学及耐蚀性能

孙颖¹, 郑留伟², 张慧云^1,2

1.山西工程职业学院冶金工程系, 山西太原 030009;
2.太原理工大学分析测试中心, 山西太原 030024

收稿日期:2022-10-20 修回日期:2023-03-15 出版日期:2023-05-25 发布日期:2023-06-21
通讯作者: 郑留伟,副教授,E-mail:zlwsmco@163.com
作者简介:孙颖(1984—),女,副教授,硕士,主要研究方向为金属的组织性能,E-mail: 261238675@qq.com。
基金资助:
山西省自然科学基金面上基金(20210302123163);山西省高等学校科技创新项目(2022L703);山西工程职业学院重点课题(KYF201902)

Micro and nano mechanical properties and corrosion resistance of SLM-printed Al_0.5CoCrFeNiTi_0.5/316L composites

Sun Ying¹, Zheng Liuwei², Zhang Huiyun^1,2

1. Metallurgical Engineering Department, Shanxi Engineering Vocational College, Taiyuan Shanxi 030009, China;
2. Instrumental Analysis Center, Taiyuan University of Technology, Taiyuan Shanxi 030024, China

Received:2022-10-20 Revised:2023-03-15 Online:2023-05-25 Published:2023-06-21

摘要/Abstract

摘要： 选用316L不锈钢为基体材料,Al_0.5CoCrFeNiTi_0.5高熵合金(HEA)粉末为颗粒增强体,通过选区激光熔化(SLM)制备了不同HEA含量的316L不锈钢基复合材料,对复合材料的微观组织、微纳力学和耐蚀性进行了研究。结果表明,SLM打印的316L不锈钢及其复合材料内部未出现孔洞、裂纹等缺陷,重熔区主要由细小的胞状晶组成,非重熔区由胞状晶和等轴晶组成,这是由凝固过程中熔池温度梯度所导致的;随着复合材料中HEA含量的增加,材料的硬度和弹性模量呈现升高的趋势,强化机制主要是固溶强化和细晶强化;复合材料的自腐蚀电位先向负后向正方向移动,自腐蚀倾向先变大后变小。

关键词: 选区激光熔化, 高熵合金, HEA/316L复合材料, 力学性能, 耐蚀性

Abstract: 316L stainless steel was selected as the matrix material and Al_0.5CoCrFeNiTi_0.5 high-entropy alloy (HEA) powder was used as the particle reinforcement. The 316L stainless steel matrix composites with different HEA contents were prepared by selective laser melting (SLM). The microstructure, micro and nano mechanical properties and corrosion resistance of the prepared composites were studied. The results show that there is no hole, crack and other defects in the 316L stainless steel and its composites printed by SLM. The remelted zone is mainly composed of fine cellular grains, while the non-remelted zone is composed of cellular grains and equiaxed grains, which is caused by the temperature gradient of the molten pool during solidification. With the increase of HEA content in the composite, both the hardness and the elastic modulus of the composite show an increasing trend, and the strengthening mechanisms are mainly solid solution strengthening and fine grain strengthening. With the addition of HEA alloy, the self-corrosion potential of the composites moves first to negative and then to positive direction, and the self-corrosion tendency increases first and then decreases.

Key words: selective laser melting, high-entropy alloy, HEA/316L composite, mechanical properties, corrosion resistance

中图分类号:

TB331

孙颖, 郑留伟, 张慧云. 选区激光熔化打印Al_0.5CoCrFeNiTi_0.5/316L复合材料的微纳力学及耐蚀性能[J]. 金属热处理, 2023, 48(5): 60-65.

Sun Ying, Zheng Liuwei, Zhang Huiyun. Micro and nano mechanical properties and corrosion resistance of SLM-printed Al_0.5CoCrFeNiTi_0.5/316L composites[J]. Heat Treatment of Metals, 2023, 48(5): 60-65.

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选区激光熔化打印Al_0.5CoCrFeNiTi_0.5/316L复合材料的微纳力学及耐蚀性能

Micro and nano mechanical properties and corrosion resistance of SLM-printed Al_0.5CoCrFeNiTi_0.5/316L composites

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选区激光熔化打印Al0.5CoCrFeNiTi0.5/316L复合材料的微纳力学及耐蚀性能

Micro and nano mechanical properties and corrosion resistance of SLM-printed Al0.5CoCrFeNiTi0.5/316L composites

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选区激光熔化打印Al_0.5CoCrFeNiTi_0.5/316L复合材料的微纳力学及耐蚀性能

Micro and nano mechanical properties and corrosion resistance of SLM-printed Al_0.5CoCrFeNiTi_0.5/316L composites