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The Effects of Heat Treatment on Microstructure and Mechanical Properties of Selective Laser Melting 6061 Aluminum Alloy

文献类型：期刊论文

作者Liu, Wei2,3; Huang, Shan2,3; Du, Shuangsong1; Gao, Ting2,3; Zhang, Zhengbin3; Chen, Xuehui2,3; Huang, Lei2,3
刊名MICROMACHINES
出版日期2022-07-01
卷号13
关键词selective laser melting 6061 aluminum alloy heat treatment microstructure mechanical properties
DOI10.3390/mi13071059
通讯作者Chen, Xuehui(chenxuehui@ahjzu.edu.cn)
英文摘要Selective laser melting technology can be used for forming curved panels of 6061 aluminum alloy thermal shield devices for the International Thermonuclear Experimental Reactor (ITER), in order to make the formed parts with better performance. This study proposes different heat treatment processes, including annealed treatment at 300 degrees C for 2 h, solution treatment at 535 degrees C and then aging at 175 degrees C over 2 h, to control the mechanical behavior of the 6061 aluminum alloy samples prepared by selective laser melting (SLM). The mechanical properties such as ductility, tensile strength, and hardness of SLM 6061 aluminum alloy were investigated, and the microstructure of the samples was analyzed. The eutectic silicon skeleton shape disappeared after annealing treatment at 300 degrees C for 2 h. The tensile strength decreased by 22.86% (from 315 MPa to 243 MPa of the deposited state samples), and the elongation increased from 2.01% to 6.89%. Moreover, the hardness reduced from 120.07 HV0.2 to 89.6 HV0.2. After solution aging, the unique microstructure of SLM disappeared. Furthermore, the precipitation of massive Si particles on the alpha-Al matrix increased, and a trace amount of the Mg2Si(beta) phase was generated. Compared with the deposited samples, the tensile strength decreased by 12.06%, while the hardness of specimens was 118.8 HV0.2. However, the elongation showed a remarkable increase of 297% (from 2.01% to 7.97%). Therefore, solution aging can critically improve the plasticity without losing significant tensile stress in the SLM 6061 aluminum alloy. This study proposes the use of SLM 6061 aluminum alloy for the thermal shields on the ITER and provides a reference for choosing a reasonable heat-treatment method for the optimal performance of the SLM 6061 aluminum alloy.
WOS关键词ALSI10MG ALLOY ; PARTS
资助项目National Natural Science Foundation of Chin[51875152] ; Anhui Province College Excellent Young Talents Fund Project[gxyq2020034] ; Natural Science Foundation of Anhui Jianzhu University[2019QDZ20] ; Key research and development Program of Anhui Province-Surface attack key project[202104a05020049]
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Instruments & Instrumentation ; Physics
语种英语
出版者MDPI
WOS记录号WOS:000834413900001
资助机构National Natural Science Foundation of Chin ; Anhui Province College Excellent Young Talents Fund Project ; Natural Science Foundation of Anhui Jianzhu University ; Key research and development Program of Anhui Province-Surface attack key project
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/132141]  
专题中国科学院合肥物质科学研究院
通讯作者Chen, Xuehui
作者单位1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
2.Anhui Jianzhu Univ, Key Lab Intelligent Mfg Construct Machinery, Hefei 230601, Peoples R China
3.Anhui Jianzhu Univ, Sch Mech & Elect Engn, Hefei 230601, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Wei,Huang, Shan,Du, Shuangsong,et al. The Effects of Heat Treatment on Microstructure and Mechanical Properties of Selective Laser Melting 6061 Aluminum Alloy[J]. MICROMACHINES,2022,13.
APA Liu, Wei.,Huang, Shan.,Du, Shuangsong.,Gao, Ting.,Zhang, Zhengbin.,...&Huang, Lei.(2022).The Effects of Heat Treatment on Microstructure and Mechanical Properties of Selective Laser Melting 6061 Aluminum Alloy.MICROMACHINES,13.
MLA Liu, Wei,et al."The Effects of Heat Treatment on Microstructure and Mechanical Properties of Selective Laser Melting 6061 Aluminum Alloy".MICROMACHINES 13(2022).

入库方式： OAI收割

来源：合肥物质科学研究院

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