Achieving high strength and ductility in selective laser melting Ti-6Al-4V alloy by laser shock peening

被引:82
作者
Lv, Jiming [1 ]
Luo, Kaiyu [1 ]
Lu, Haifei [1 ]
Wang, Zhao [1 ]
Liu, Jiajun [1 ]
Lu, Jinzhong [1 ]
机构
[1] Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
Laser shock peening; Selective laser melting; Residual stress; Ti-6Al-4V titanium alloy; Microstructure; Tensile property; RESIDUAL-STRESS; MECHANICAL-PROPERTIES; GRAIN-REFINEMENT; MICROSTRUCTURE EVOLUTION; PLASTIC-DEFORMATION; HEAT-TREATMENT; TITANIUM; PREDICTION; BEHAVIOR; STRAIN;
D O I
10.1016/j.jallcom.2021.163335
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this work, the influences of laser shock peening (LSP) on the residual stress state, microstructures and mechanical properties of Ti-6Al-4V alloy fabricated by selective laser melting (SLM) were researched. Particularly, the microstructural evolution before and after LSP was clarified using electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) observations. The results showed that the residual stress was adjusted from tensile to compressive state. Furthermore, high-density dislocations and a great number of parallel nano mechanical twins (nano-MTs) were promoted in the coarse lamellar alpha' structures, contributing to the grain refinement. The ultimate tensile strength and elongation of the SLM-manufactured (SLMed) Ti-6Al-4V alloy increased by approximately 14.3% and 18.3% after LSP treatment, respectively. Finally, the dominant mechanism of tensile property enhancement by LSP was revealed. High levels of compressive residual stress and grain refinement of the alpha' structures induced by LSP realized the excellent combination of strength and ductility. (c) 2021 Elsevier B.V. All rights reserved.
引用
收藏
页数:10
相关论文
共 48 条
[1]   Influence of stacking-fault energy on the accommodation of severe shear strain in Cu-Al alloys during equal-channel angular pressing [J].
An, Xianghai ;
Lin, Qingyun ;
Qu, Shen ;
Yang, Gang ;
Wu, Shiding ;
Zhang, Zhe-Feng .
JOURNAL OF MATERIALS RESEARCH, 2009, 24 (12) :3636-3646
[2]   Numerical prediction of plastic deformation and residual stresses induced by laser shock processing [J].
Arif, AFM .
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2003, 136 (1-3) :120-138
[3]   Experimental realisation of build orientation effects on the mechanical properties of truly as-built Ti-6Al-4V SLM parts [J].
Baghi, Alireza Dareh ;
Nafisi, Shahrooz ;
Hashemi, Reza ;
Ebendorff-Heidepriem, Heike ;
Ghomashchi, Reza .
JOURNAL OF MANUFACTURING PROCESSES, 2021, 64 :140-152
[4]   RESIDUAL-STRESSES INDUCED BY LASER-SHOCKS [J].
BALLARD, P ;
FOURNIER, J ;
FABBRO, R ;
FRELAT, J .
JOURNAL DE PHYSIQUE III, 1991, 1 (C3) :487-494
[5]   An overview of residual stresses in metal powder bed fusion [J].
Bartlett, Jamison L. ;
Li, Xiaodong .
ADDITIVE MANUFACTURING, 2019, 27 :131-149
[6]   Nature-Inspired Hierarchical Steels [J].
Cao, Shan Cecilia ;
Liu, Jiabin ;
Zhu, Linli ;
Li, Ling ;
Dao, Ming ;
Lu, Jian ;
Ritchie, Robert O. .
SCIENTIFIC REPORTS, 2018, 8
[7]   Plastic-deformation-driven SiC nanoparticle implantation in an Al surface by laser shock wave: Mechanical properties, microstructure characteristics, and synergistic strengthening mechanisms [J].
Cui, Chengyun ;
Cui, Xigui ;
Li, Xiaodong ;
Luo, Kaiyu ;
Lu, Jinzhong ;
Ren, Xudong ;
Zhou, Jianzhong ;
Fang, Cui ;
Farkouh, Raif ;
Lu, Yongfeng .
INTERNATIONAL JOURNAL OF PLASTICITY, 2018, 102 :83-100
[8]   PHYSICAL STUDY OF LASER-PRODUCED PLASMA IN CONFINED GEOMETRY [J].
FABBRO, R ;
FOURNIER, J ;
BALLARD, P ;
DEVAUX, D ;
VIRMONT, J .
JOURNAL OF APPLIED PHYSICS, 1990, 68 (02) :775-784
[9]   Strengthening characteristics in TC17 titanium alloy treated during LSP [J].
Fang, Yingwu .
OPTIK, 2021, 226
[10]   Effects of ultrasonic peening treatment in three directions on grain refinement and anisotropy of cold metal transfer additive manufactured Ti-6Al-4V thin wall structure [J].
Gou, Jian ;
Wang, Zhijiang ;
Hu, Shengsun ;
Shen, Junqi ;
Tian, Yinbao ;
Zhao, Guancheng ;
Chen, Youquan .
JOURNAL OF MANUFACTURING PROCESSES, 2020, 54 :148-157