材料科学技术(英文版)2024，Vol.191Issue(24) ：146-156.DOI:10.1016/j.jmst.2024.01.011

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

Yinghang Liu Zhe Song Yi Guo Gaoming Zhu Yunhao Fan Huamiao Wang Wentao Yan Xiaoqin Zeng Leyun Wang
材料科学技术(英文版)2024，Vol.191Issue(24) ：146-156.DOI:10.1016/j.jmst.2024.01.011
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Simultaneously enhancing strength and ductility of LPBF Ti alloy via trace Y2O3 nanoparticle addition

Yinghang Liu 1Zhe Song 1Yi Guo 1Gaoming Zhu 2Yunhao Fan 1Huamiao Wang 3Wentao Yan 4Xiaoqin Zeng 5Leyun Wang6
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作者信息

  • 1. National Engineering Research Center of Light Alloy Net Forming,Shanghai Jiao Tong University,Shanghai 200240,China
  • 2. National Engineering Research Center of Light Alloy Net Forming,Shanghai Jiao Tong University,Shanghai 200240,China;Deutsches Elektronen-Synchrotron(DESY),Hamburg 22607,Germany
  • 3. State Key Laboratory of Mechanical Systems and Vibration,Shanghai Jiao Tong University,Shanghai 200240,China
  • 4. College of Design and Engineering,National University of Singapore,117575,Singapore
  • 5. National Engineering Research Center of Light Alloy Net Forming,Shanghai Jiao Tong University,Shanghai 200240,China;State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University,Shanghai 200240,China
  • 6. National Engineering Research Center of Light Alloy Net Forming,Shanghai Jiao Tong University,Shanghai 200240,China;State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University,Shanghai 200240,China;Zhangjiang Institute for Advanced Study,Shanghai Jiao Tong University,Shanghai 201203,China
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Abstract

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 Y2O3 nanoparticles added to a pre-alloyed Ti-4Al-4V(Ti44)powder provides an excellent feedstock for LPBF.As-built Ti44-Y2O3 materials exhibited a strength-ductility combination that is slightly better than heat-treated LPBF Ti64.Some Y2O3 particles may have melted or decomposed during LPBF.From electron microscopy,the addition of Y2O3 refined α'martensite laths and weakened variant preference during β→α'transformation.Based on in situ synchrotron X-ray diffraction and elastic-viscoplastic self-consistent(EVPSC)modeling,<c+a>slip was more active in as-built Ti44-Y2O3 than in as-built Ti64 or Ti44.This work demonstrates that LPBF can be an excellent method to fabricate metal-nanoparticle composite materials.

Key words

Titanium alloys/Additive manufacturing/Nanoparticles/Ductility/Synchrotron diffraction

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基金项目

National Key Research and Development Program of China(2021YFB3702602)

National Natural Science Foundation of China(U2032124)

出版年

2024
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

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影响因子：0.657
ISSN：1005-0302
参考文献量57
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