东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (6): 76-85.DOI: 10.12068/j.issn.1005-3026.2025.20230333

• 机械工程 • 上一篇    下一篇

选区激光熔化FeCoNiCr系高熵合金机械性能实验研究

温雪龙, 赵正豪, 宋林原, 王承宝   

  1. 东北大学 机械工程与自动化学院,辽宁 沈阳 110819
  • 收稿日期:2023-12-15 出版日期:2025-06-15 发布日期:2025-09-01
  • 作者简介:温雪龙(1985—),男,辽宁沈阳人,东北大学副教授.
  • 基金资助:
    国家自然科学基金资助项目(52275412)

Experimental Study on Mechanical Properties of FeCoNiCr High-Entropy Alloy by Selective Laser Melting

Xue-long WEN, Zheng-hao ZHAO, Lin-yuan SONG, Cheng-bao WANG   

  1. School of Mechanical Engineering & Automation,Northeastern University,Shenyang 110819,China. Corresponding author: WEN Xue-long,E-mail: wenxl@me. neu. edu. cn
  • Received:2023-12-15 Online:2025-06-15 Published:2025-09-01

摘要:

通过对选区激光熔化法制备的FeCoNiCrAl0.5,FeCoNiCrTi0.5高熵合金成形试件进行机械性能影响因素实验研究,探寻高熵合金致密度与硬度随激光功率、扫描速度、扫描间距的变化规律以及粉末种类和元素类型对拉伸性能的影响,并对高熵合金试件拉伸断口形貌进行分析.实验结果表明:随着激光功率、扫描速度、扫描间距的增大,试件的致密度与硬度先升高后下降.采用合金化粉末制备的FeCoNiCrAl0.5试件相较于混合粉末拉伸性能更优越,FeCoNiCrTi0.5高熵合金与FeCoNiCrAl0.5高熵合金相比抗拉强度更大,韧性更强.采用混合粉末与合金化粉末制备的FeCoNiCrAl0.5成形试件的拉伸断裂方式以脆性与韧性断裂为主,而采用混合粉末制备的FeCoNiCrTi0.5成形试件则以塑性断裂为主.

关键词: 高熵合金, 选区激光熔化, 致密度, 硬度, 拉伸性能

Abstract:

Through experimental research on the influencing factors of mechanical properties of FeCoNiCrAl0.5 and FeCoNiCrTi0.5 high-entropy alloy formed specimens prepared by the selective laser melting method, the changes of density and hardness of the high-entropy alloy with laser power, scanning speed and scanning spacing, as well as the effects of powder type and element type on the tensile properties were investigated, and the tensile fracture morphology of the high-entropy alloy specimens was analyzed. The experimental results showed that the density and hardness of the specimens increase at first and then decrease with the increase of laser power, scanning speed and scanning spacing. Compared with the mixed powder, the tensile properties of FeCoNiCrAl0.5 specimen prepared by alloyed powder are better, FeCoNiCrTi0.5 high-entropy alloy has higher tensile strength and stronger toughness than FeCoNiCrAl0.5 high-entropy alloy. The tensile fracture of FeCoNiCrAl0.5 formed specimen prepared by mixed powder and alloyed powder is mostly brittle and ductile fracture, while the FeCoNiCrTi0.5 formed specimen prepared by mixed powder are mainly plastic fracture.

Key words: high-entropy alloy, selective laser melting, density, hardness, tensile property

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