Tailoring high-temperature mechanical properties of laser powder bed fusion Ti-6.5Al-2Zr-1Mo-1 V alloy via microstructure design

doi:10.1016/j.matdes.2023.112488

IMR OpenIR

	Tailoring high-temperature mechanical properties of laser powder bed fusion Ti-6.5Al-2Zr-1Mo-1 V alloy via microstructure design
	Zhang, Yu 1,2; Zhai, Zirong 1; Wu, Zhaoxuan 1; Lin, Wenhu 1; Yang, Rui 1,3; Zhang, Zhenbo 1
通讯作者	Zhang, Zhenbo(zhangzhb1@shanghaitech.edu.cn)
	2023-12-01
发表期刊	MATERIALS & DESIGN
ISSN	0264-1275
卷号	236 页码:18
摘要	The microstructure of Ti-6.5Al-2Zr-1Mo-1 V (TA15) alloy fabricated by laser powder bed fusion (LPBF) is characterized by the ultrafine alpha ' martensite with a high density of dislocations and twins, which is distinct to that of conventionally forged TA15 alloy. The alpha ' martensite in the as-built alloy transforms to stable alpha phase when annealing below the beta transus, and meanwhile the dislocation density decreases and the alpha lamellae coarsen with increasing of annealing temperature. An excellent synergy of strength and ductility was achieved in the sample after designated heat treatments, which is better than that of the forged counterpart at both room temperature and 500 degrees C. In-situ tensile test at 500 degrees C demonstrated that the plasticity of as-built TA15 alloy was dominated by the formation of microscale shear bands (MSBs) between the alpha ' lamellae, which results in pronounced strain localization and limited tensile ductility. In the sample with coarsened alpha lamellae, it was found that the acti-vation of pyramidal < c + a > slip system at 500 degrees C effectively alleviated the strain localization and cracking tendency during mechanical loading, which is essential to achieve a desired balance of strength and ductility. These findings are helpful to promote the practical applications of LPBF near-alpha titanium alloys.
关键词	Ti-6.5Al-2Zr-1Mo-1V alloy Laser powder bed fusion In situ tensile test Microstructure characterization Mechanical property Dislocation
资助者	National Key R & D Program of China ; National Natural Science Foundation of China ; Shanghai Science and Technology Development Funds ; ShanghaiTech University Startup Fund
DOI	10.1016/j.matdes.2023.112488
收录类别	SCI
语种	英语
资助项目	National Key R & D Program of China[2021YFC2801802] ; National Natural Science Foundation of China[52001212] ; Shanghai Science and Technology Development Funds[23ZR1442600] ; ShanghaiTech University Startup Fund
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:001124361200001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：15[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/321006/182969
专题	中国科学院金属研究所
通讯作者	Zhang, Zhenbo
作者单位	1.ShanghaiTech Univ, Ctr Adapt Syst Engn, Sch Creat & Art, Shanghai 201210, Peoples R China 2.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yu,Zhai, Zirong,Wu, Zhaoxuan,et al. Tailoring high-temperature mechanical properties of laser powder bed fusion Ti-6.5Al-2Zr-1Mo-1 V alloy via microstructure design[J]. MATERIALS & DESIGN,2023,236:18.
APA	Zhang, Yu,Zhai, Zirong,Wu, Zhaoxuan,Lin, Wenhu,Yang, Rui,&Zhang, Zhenbo.(2023).Tailoring high-temperature mechanical properties of laser powder bed fusion Ti-6.5Al-2Zr-1Mo-1 V alloy via microstructure design.MATERIALS & DESIGN,236,18.
MLA	Zhang, Yu,et al."Tailoring high-temperature mechanical properties of laser powder bed fusion Ti-6.5Al-2Zr-1Mo-1 V alloy via microstructure design".MATERIALS & DESIGN 236(2023):18.