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Laser powder bed fusion of metastable β titanium alloys: Enhanced strength and plasticity through simultaneous activation of multiple deformation mechanisms

文献类型：期刊论文

作者Zhang, Wenjing2; Qi, Xiaonan2; Zhong, Shuyan2; Wang, Kai3; Zhang, Shubo2; Jiao, Ye2; Li, Ang4; Xu, Huaqi1; Chen, Junyu5; Fang, Gang5
刊名ADDITIVE MANUFACTURING
出版日期2024-08-05
卷号93
关键词Laser powder bed fusion Metastable beta titanium alloy Deformation mechanism omega phase beta phase stability
ISSN号2214-8604
DOI10.1016/j.addma.2024.104437
通讯作者Qi, Xiaonan(XiaonanQi_Tsinghua@163.com) ; Liu, Wei(liuw@tsinghua.edu.cn)
英文摘要The excellent mechanical properties of metastable beta titanium alloys make them suitable for use in aerospace and biomedical fields. However, the deformation mechanisms of these alloys are currently limited to slip/twinning or twinning/transformation-induced plasticity (TRIP) based on beta phase stability, hindering high strength and plasticity. In this study, we regulated the laser powder bed fusion (LPBF) parameters to control omega phase density and beta phase stability, thereby simultaneously triggering slip/twinning/TRIP deformation mechanisms and resulting in a high strength-plastic metastable beta titanium alloy. The results demonstrated that reducing laser energy density decreased the omega phase fraction, leading to a decrease in beta phase stability. The formation of the omega phase in specimens with low energy density increased the strain requirements for TRIP to occur, promoting dislocation slip and twinning initiation under low strain conditions. Due to TRIP effect activation at high strains, the alpha ' phase rather than the alpha '' phase became the transformation product, subsequently promoting twin formation within the alpha ' phase during further deformation. Generation of dislocation/twinning/TRIP and twins in the alpha' phase resulted in an LPBF-ed metastable beta Ti-1023 alloy with excellent strength and plasticity, which surpassed previous research findings for LPBF metastable beta titanium alloys and overcame the strength-plasticity trade-off observed in traditional metal materials.
WOS关键词TI-NB ALLOYS ; OMEGA-PHASE ; BCC PHASE ; MICROSTRUCTURE ; TRANSFORMATION ; BEHAVIOR ; MARTENSITE ; MODULUS ; EXAMPLE ; DESIGN
资助项目Program of China[2019YFE03130003] ; Program of China[2022YEF03130003] ; China Postdoctoral Science Foundation[2022M711753] ; Postdoctoral Fellowship Program of CPSF[GZC20231201]
WOS研究方向Engineering ; Materials Science
语种英语
WOS记录号WOS:001320607300001
出版者ELSEVIER
资助机构Program of China ; China Postdoctoral Science Foundation ; Postdoctoral Fellowship Program of CPSF
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/135634]  
专题中国科学院合肥物质科学研究院
通讯作者Qi, Xiaonan; Liu, Wei
作者单位1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
2.Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China
3.Beihang Univ, Sch Mat Sci & Engn, Xueyuan Rd 37, Beijing 100191, Peoples R China
4.China United Gas Turbine Technol Co Ltd, Beijing 100016, Peoples R China
5.Tsinghua Univ, Dept Mech Engn, State Key Lab Tribol, Beijing 100084, Peoples R China
6.Suzhou Lab, SIP, 388 Ruoshui St, Suzhou 215123, Jiangsu, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Wenjing,Qi, Xiaonan,Zhong, Shuyan,et al. Laser powder bed fusion of metastable β titanium alloys: Enhanced strength and plasticity through simultaneous activation of multiple deformation mechanisms[J]. ADDITIVE MANUFACTURING,2024,93.
APA Zhang, Wenjing.,Qi, Xiaonan.,Zhong, Shuyan.,Wang, Kai.,Zhang, Shubo.,...&Liu, Wei.(2024).Laser powder bed fusion of metastable β titanium alloys: Enhanced strength and plasticity through simultaneous activation of multiple deformation mechanisms.ADDITIVE MANUFACTURING,93.
MLA Zhang, Wenjing,et al."Laser powder bed fusion of metastable β titanium alloys: Enhanced strength and plasticity through simultaneous activation of multiple deformation mechanisms".ADDITIVE MANUFACTURING 93(2024).

入库方式： OAI收割

来源：合肥物质科学研究院

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