Simultaneously enhancing strength and ductility of LPBF Ti alloy via trace Y2O3 addition

被引：10

作者：

Liu, Yinghang ^{[1
]}

Song, Zhe ^{[1
]}

Guo, Yi ^{[1
]}

Zhu, Gaoming ^{[1
,2
]}

Fan, Yunhao ^{[1
]}

Wang, Huamiao ^{[3
]}

Yan, Wentao ^{[4
]}

Zeng, Xiaoqin ^{[1
,5
]}

Wang, Leyun ^{[1
,5
,6
]}

机构：

[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China

[2] Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany

[3] Shanghai Jiao Tong Univ, State Key Lab Mech Syst & Vibrat, Shanghai 200240, Peoples R China

[4] Natl Univ Singapore, Coll Design & Engn, Singapore 117575, Singapore

[5] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[6] Shanghai Jiao Tong Univ, Zhangjiang Inst Adv Study, Shanghai 201203, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2024年 / 191卷

关键词：

Titanium alloys; Additive manufacturing; Nanoparticles; Ductility; Synchrotron diffraction; MANUFACTURED TI-6AL-4V; MECHANICAL-PROPERTIES; HEAT-TREATMENT; LASER; MICROSTRUCTURE; MARTENSITE; COMPONENTS; STRESS;

D O I：

10.1016/j.jmst.2024.01.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Laser powder bed fusion (LPBF) is a popular additive manufacturing (AM) technique to fabricate metal components. LPBF Ti alloys often exhibit high strength but poor ductility. In this study, we report that trace Y2 O3 nanoparticles added to a pre-alloyed Ti-4Al-4V (Ti44) powder provides an excellent feedstock for LPBF. As-built Ti44-Y2 O3 materials exhibited a strength-ductility combination that is slightly better than heat-treated LPBF Ti64. Some Y2 O3 particles may have melted or decomposed during LPBF. From electron microscopy, the addition of Y2 O3 refined alpha' martensite laths and weakened variant preference during ,B -> alpha' transformation. Based on in situ synchrotron X-ray diffraction and elastic-viscoplastic selfconsistent (EVPSC) modeling, ( c + a ) slip was more active in as-built Ti44-Y2 O3 than in as-built Ti64 or Ti44. This work demonstrates that LPBF can be an excellent method to fabricate metal-nanoparticle composite materials. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：146 / 156

页数：11

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