选区激光熔化制备AlCoCrFeNi高熵合金的成形性能

doi:10.13251/j.issn.0254-6051.2022.12.005

金属热处理 ›› 2022, Vol. 47 ›› Issue (12): 28-35.DOI: 10.13251/j.issn.0254-6051.2022.12.005

选区激光熔化制备AlCoCrFeNi高熵合金的成形性能

魏水淼¹, 马盼^1,2, 张志宇¹, 方亚成¹, 杨植禄¹, 张楠¹

1.上海工程技术大学材料工程学院, 上海 201620;
2.哈尔滨工业大学先进焊接与连接国家重点实验室, 黑龙江哈尔滨 150001

收稿日期:2022-07-14 修回日期:2022-09-27 出版日期:2022-12-25 发布日期:2023-01-05
通讯作者: 马盼,副教授,博士,E-mail:mapan@sues.edu.cn
作者简介:魏水淼(1997—),男,硕士研究生,主要研究方向为高熵合金增材制造,E-mail:weishm1412@163.com。
基金资助:
哈尔滨工业大学先进焊接与连接国家重点实验室开放课题(AWJ-22M05)

Processability of AlCoCrFeNi high entropy alloy fabricated by selective laser melting

Wei Shuimiao¹, Ma Pan^1,2, Zhang Zhiyu¹, Fang Yacheng¹, Yang Zhilu¹, Zhang Nan¹

1. School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China;
2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin Heilongjiang 150001, China

Received:2022-07-14 Revised:2022-09-27 Online:2022-12-25 Published:2023-01-05

摘要/Abstract

摘要： 采用选区激光熔化(SLM)技术制备了AlCoCrFeNi高熵合金,研究了激光工艺参数对成形性、致密度、微观组织以及力学性能的影响。结果表明,随体能量密度的增加,致密度逐渐增加,最佳的SLM参数为激光功率50 W,扫描速度300 mm/s,扫描间距70 μm,层厚30 μm。铸态和SLM态合金是由无序BCC相(A2)和有序BCC相(B2)组成的双相体心立方结构,由于细晶强化作用,选区激光熔化试样具有比铸态试样更高的显微硬度,但是压缩屈服强度降低,原因是选区激光熔化合金中存在裂纹、孔洞等缺陷。

关键词: 选区激光熔化, AlCoCrFeNi高熵合金, 力学性能

Abstract: AlCoCrFeNi high entropy alloy was fabricated by selective laser melting (SLM) technology. The effect of laser process parameters on processability, densification, microstructure and mechanical properties was studied. The results show that the relative density gradually increases with the increase of volumetric energy density. The best process parameters is the laser power of 50 W, the scanning speed of 300 mm/s, the scanning spacing of 70 μm and the layer thickness of 30 μm. The as-cast and SLMed alloy has a dual-phase body-centered cubic structure composed of disordered BCC phase (A2) and ordered BCC phase (B2). Due to the fine grain strengthening effect, the SLMed specimen has higher microhardness than that of the as-cast one, but the compressive yield strength decreases. The reason is due to the defects such as cracks and holes in the SLMed specimen.

Key words: selective laser melting, AlCoCrFeNi high entropy alloy, mechanical properties

中图分类号:

TG456.7

魏水淼, 马盼, 张志宇, 方亚成, 杨植禄, 张楠. 选区激光熔化制备AlCoCrFeNi高熵合金的成形性能[J]. 金属热处理, 2022, 47(12): 28-35.

Wei Shuimiao, Ma Pan, Zhang Zhiyu, Fang Yacheng, Yang Zhilu, Zhang Nan. Processability of AlCoCrFeNi high entropy alloy fabricated by selective laser melting[J]. Heat Treatment of Metals, 2022, 47(12): 28-35.

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选区激光熔化制备AlCoCrFeNi高熵合金的成形性能

Processability of AlCoCrFeNi high entropy alloy fabricated by selective laser melting

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