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陈金汉,耿遥祥,侯裕,唐浩,罗金杰,喻利花,许俊华,鞠洪博.选区激光熔化Al-Mg-Sc-Zr合金成形性及力学性能研究[J].稀有金属材料与工程(英文),2020,49(11):3882~3889.[Chen Jinhan,Geng Yaoxiang,Hou Yu,Tang Hao,Luo Jinjie,Yu Lihua,Xu Junhua and Ju Hongbo.Formation and Mechanical Properties of Al-Mg-Sc-Zr Alloy Prepared by Selective Laser Melting[J].Rare Metal Materials and Engineering,2020,49(11):3882~3889.]
Formation and Mechanical Properties of Al-Mg-Sc-Zr Alloy Prepared by Selective Laser Melting
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Received:November 20, 2019  Revised:January 02, 2020
DOI:
Key words: Selective laser melting  Al-Mg-Sc-Zr alloy  aging treatment  microstructure  mechanical properties
Foundation item:国家重点研发计划项目(No. 2016YFB1100103)、江苏省自然科学基金青年(No. BK20180985)和江苏省高等学校自然科学研究面上项目(No. 18KJB430011)资助
Author NameAffiliation
Chen Jinhan,Geng Yaoxiang,Hou Yu,Tang Hao,Luo Jinjie,Yu Lihua,Xu Junhua and Ju Hongbo  
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Abstract:
      In this study, Al-Mg-Sc-Zr aluminum alloy was prepared by selective laser melting (SLM). The effects of different processing parameters on the formation and different aging conditions on mechanical properties of SLM-formed samples were investigated. The results show that the high density samples can be obtained at a high laser power and a low laser scanning speed. The layer by layer stacking of the molten pool can be observed along the deposition direction of the sample. The nanoparticles are observed at both the inside and boundary of molten pool. After aging treatment at different temperatures, the hardness and compressive yield strength of the sample first increase and then decrease. The maximum yield strength ~469 ± 4 MPa is achieved after aged the sample at 400 ° C for 3 h.