The role of TiH2 on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy fabricated by laser powder bed fusion

doi:10.1016/j.msea.2023.144819

IMR OpenIR

	The role of TiH2 on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy fabricated by laser powder bed fusion
	Jiang, Fuqing 1,2; Tang, Lei 3; Ye, Hengqiang 2; Yang, Zhiqing 2
通讯作者	Yang, Zhiqing(yangzq34@yahoo.com)
	2023-03-24
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	869 页码:16
摘要	In this study, a crack-free 7075 aluminum alloy composed of fine, randomly-oriented and equiaxed grains similar to 1 mu m in size was successfully prepared by laser powder bed fusion (L-PBF). TiH2 particles were introduced to achieve significant grain refinement, serving as a critical method to relieve the high residual stress and prohibit inherent hot cracking during L-PBF manufacturing. Multiscale microstructural characterizations were applied to reveal the mechanisms of grain refinement and elimination of hot cracking. On the one hand, in-situ produced L1(2)-structured Al3Ti particles stimulated heterogeneous nucleation of alpha-Al. On the other hand, Ti solute atoms played an important role in restricting grain growth during solidification. A conventional T6 treatment was conducted to modify the microstructures and mechanical properties of the alloy. E-Al18Mg3(Ti,Cr)(2) dispersoids were precipitated, playing a role in strengthening through pinning grain boundaries. Thanks to grain boundary strengthening and Orowan dislocation strengthening arising from eta' precipitates, Al3Ti particles and E dispersoids, the yield strength, ultimate tensile strength and elongation of T6 treated 7075-Ti alloy are 496 +/- 10.8 MPa, 537 +/- 7.6 MPa and 7.2 +/- 0.3 %, respectively. These findings provide a broader insight into the use of TiH2 to improve the microstructure and mechanical properties of L-PBF-fabricated high-strength aluminum alloy.
关键词	Al-Zn-Mg-Cu alloy Laser powder bed fusion Grain refinement Microstructure Mechanical property
资助者	National Natural Science Foundation of China ; Basic and Applied Basic Research Program of Guangdong Province ; Institute of Metal Research, Chinese Academy of Sciences
DOI	10.1016/j.msea.2023.144819
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51971225] ; National Natural Science Foundation of China[51771202] ; Basic and Applied Basic Research Program of Guangdong Province[2021B0301030003] ; Basic and Applied Basic Research Program of Guangdong Province[X210141TL210] ; Institute of Metal Research, Chinese Academy of Sciences
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001018896400001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/178547
专题	中国科学院金属研究所
通讯作者	Yang, Zhiqing
作者单位	1.Univ Sci & Technol China, Inst Met Res, Chinese Acad Sci, Sch Mat Sci & Engn,Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Ji Hua Lab, Foshan 528200, Peoples R China 3.Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Fuqing,Tang, Lei,Ye, Hengqiang,et al. The role of TiH2 on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy fabricated by laser powder bed fusion[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,869:16.
APA	Jiang, Fuqing,Tang, Lei,Ye, Hengqiang,&Yang, Zhiqing.(2023).The role of TiH2 on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy fabricated by laser powder bed fusion.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,869,16.
MLA	Jiang, Fuqing,et al."The role of TiH2 on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy fabricated by laser powder bed fusion".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 869(2023):16.