Effect of laser power on microstructure and mechanical properties of high entropy alloy /316L stainless steel materials

Sun Ying; Zhang Huiyun; Zheng Liuwei

doi:10.7513/j.issn.1004-7638.2024.02.025

Volume 45 Issue 2

Feb. 2024

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Sun Ying, Zhang Huiyun, Zheng Liuwei. Effect of laser power on microstructure and mechanical properties of high entropy alloy /316L stainless steel materials[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(2): 176-181. doi: 10.7513/j.issn.1004-7638.2024.02.025

Citation:

Sun Ying, Zhang Huiyun, Zheng Liuwei. Effect of laser power on microstructure and mechanical properties of high entropy alloy /316L stainless steel materials[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(2): 176-181. doi: 10.7513/j.issn.1004-7638.2024.02.025

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Effect of laser power on microstructure and mechanical properties of high entropy alloy /316L stainless steel materials

doi: 10.7513/j.issn.1004-7638.2024.02.025

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

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Received Date: 2022-12-15
Available Online: 2024-04-30
Publish Date: 2024-04-30

Abstract

Abstract

Selective laser additive manufacturing (SLM) fabricated metal matrix composites have many advantages such as flexible structure and controllable composition. In this paper, 316L stainless steel was used as the matrix material and Al_0.5CoCrFeNiTi_0.5 high entropy alloy (HEA) powder was used as the particle reinforcement to study the effect of laser power on the microstructure, micro-nano mechanical and macro-mechanical properties of Al_0.5CoCrFeNiTi_0.5 /316L composites during SLM printing. The results show that with the increase of laser power, the forming quality of the composite decreases and the microcracks occur in the composite. The original spherical particles of high entropy alloy do not exist, the elements in the composite are evenly distributed, the fluidity of the adding pool of Al_0.5CoCrFeNiTi_0.5 particles decreases, and the remelted zone presents equiaxed crystal distribution. With the increase of laser power, the hardness of remelted zone and non-remelted zone increases, and the elastic recovery rate decreases as a whole. The tensile strength and elongation also decrease with the increase of laser power, and the tensile strength is up to 1136 MPa. The internal strengthening mechanism of Al_0.5CoCrFeNiTi_0.5 particles is mainly attributed to solid solution strengthening and the fracture form is ductile fracture.
- HEA/316L materials,
- SLM,
- laser power,
- microstructure,
- mechanical property,
- solid solution strengthening

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References(16)

References

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