Research Progress in Formation and Control of Defects in High-strength Aluminum Alloys by Selective Laser Melting

Lu Qiang; Li Kai; Yang Mingjun; Li Liya; Li Ruidi; Du Yong; Zhang Ying; Wang Jicheng; Li Gu′nan

doi:10.15980/j.tzzz.2021.06.009

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Research Progress in Formation and Control of Defects in High-strength Aluminum Alloys by Selective Laser Melting
Vol. 41, Issue 6, Pages: 703-712(2021)
Published： 2021 ，
DOI： 10.15980/j.tzzz.2021.06.009

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[1]鲁强,李凯,杨明军,李丽娅,李瑞迪,杜勇,张莹,王继成,李谷南.选区激光熔化高强铝合金缺陷的形成及控制研究进展[J].特种铸造及有色合金,2021,41(06):703-712.

Lu Qiang, Li Kai, Yang Mingjun, et al. Research Progress in Formation and Control of Defects in High-strength Aluminum Alloys by Selective Laser Melting. [J]. Special Casting & Nonferrous Alloys 41(6):703-712(2021)
[1]鲁强,李凯,杨明军,李丽娅,李瑞迪,杜勇,张莹,王继成,李谷南.选区激光熔化高强铝合金缺陷的形成及控制研究进展[J].特种铸造及有色合金,2021,41(06):703-712. DOI： 10.15980/j.tzzz.2021.06.009.

Lu Qiang, Li Kai, Yang Mingjun, et al. Research Progress in Formation and Control of Defects in High-strength Aluminum Alloys by Selective Laser Melting. [J]. Special Casting & Nonferrous Alloys 41(6):703-712(2021) DOI： 10.15980/j.tzzz.2021.06.009.

摘要

介绍了高强铝合金在选区激光熔化成形过程中的气孔、热裂纹等缺陷类型

总结了最新研究成果中控制缺陷形成的措施

如合理控制工艺参数、添加异质形核剂等。介绍了相图热力学计算中希尔凝固与相平衡模块在选区激光熔化成形高强铝合金设计与制备中的应用

提出了利用相图热力学计算优化合金成分、促进α-AlFeMnSi快速形核等来获得新型无裂纹的选区激光熔化成形高强铝合金材料的新途径

可以实现选区熔化成形高强铝合金的快速设计。

Abstract

The defects such as pores and hot cracks forming in high-strength aluminum alloys during the selective laser melting process were described. The methods to control the formation of defects in the latest researches were summarized

such as reasonable control of process parameters and addition of heterogeneous nucleating agents. The application of the Scheil and phase equilibrium modules

belonging to the phase diagram thermodynamic calculation

in the design and preparation of high-strength aluminum alloy by selected laser melting was introduced. A new method using phase diagram thermodynamic calculation to optimize the alloy composition and promote the rapid nucleation of α-AlFeMnSi was presented

which can realize the quick design of high-strength aluminum alloy without cracks by selected laser melting.