Acta Metallurgica Sinica (English Letters) ›› 2025, Vol. 38 ›› Issue (1): 102-106.DOI: 10.1007/s40195-024-01777-y

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Synergistic Improvement in Ductility and Hot Nitric Acid Corrosion Resistance of LPBF Ti-6Al-4V Alloy via Hot Isostatic Pressing

Zheng Liu1,2, De-Chun Ren3, Lian-Min Zhang1(), Ai-Li Ma1, Hai-Bin Ji3, Yu-Gui Zheng1()   

  1. 1CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
    2School of Materials Science and Engineering, University of Science and Technology of China, Shenyang, 110016, China
    3Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
  • Received:2024-07-01 Revised:2024-07-30 Accepted:2024-08-07 Online:2025-01-10 Published:2024-09-28
  • Contact: Lian-Min Zhang,lmzhang14s@imr.ac.cn; Yu-Gui Zheng,ygzheng@imr.ac.cn
  • About author:First author contact:

    Zheng Liu, De-Chun Ren have contributed equally to this work.

Abstract:

Laser powder bed fusion (LPBF) technology offers a promising solution to the fabricability challenges of titanium alloys; however, it introduces defects such as porosity and cracking. Here, we evaluated the effectiveness of hot isostatic pressing (HIP) in eliminating defects and enhancing the overall properties of LPBF Ti-6Al-4V alloy. Our findings indicated that LPBF Ti-6Al-4V alloy after HIP established better corrosion resistance and ductility. These improvements could be related to the decomposition of αʹ phase and the elimination of internal defects within alloy matrix. Furthermore, the application prospect of LPBF Ti-6Al-4V alloy in spent fuel reprocessing environment was expounded.

Key words: Laser powder bed fusion, Ti-6Al-4V, Hot isostatic pressing, Corrosion, Mechanical properties