High Thermal Stability of a Colony and Basket-Weave Mixed Microstructure in Selective-Laser-Melted Ti-6Al-4V AlloyInduced by Electropulsing
Lai Wei,
Xiaofeng Xu,
Yang Zhao,
Xudong Yan,
Yachong Zhou,
Zhicheng Wu,
Yongqiang Yu
Affiliations
Lai Wei
Key Laboratory of Automobile Materials, Ministry of Education and Department of Materials Science and Engineering, Jilin University, Changchun 130022, China
Xiaofeng Xu
Key Laboratory of Automobile Materials, Ministry of Education and Department of Materials Science and Engineering, Jilin University, Changchun 130022, China
Yang Zhao
Weihai Institute for Bionics, Jilin University, Weihai 130022, China
Xudong Yan
Key Laboratory of Automobile Materials, Ministry of Education and Department of Materials Science and Engineering, Jilin University, Changchun 130022, China
Yachong Zhou
Key Laboratory of Automobile Materials, Ministry of Education and Department of Materials Science and Engineering, Jilin University, Changchun 130022, China
Zhicheng Wu
Key Laboratory of Automobile Materials, Ministry of Education and Department of Materials Science and Engineering, Jilin University, Changchun 130022, China
Yongqiang Yu
Key Laboratory of Automobile Materials, Ministry of Education and Department of Materials Science and Engineering, Jilin University, Changchun 130022, China
A colony and basket-weave mixed microstructure in the selective-laser-melted (SLM) Ti-6Al-4V alloy was introduced by electropulsing, which showed high thermal stability. The mechanism was investigated by electron backscatter diffraction (EBSD) and X-ray diffraction (XRD) analysis. It was found that the low content of the β-phase favored the inhibition of microstructure coarsening. The increasing β-phases during the stabilization annealing (700 °C/16 h) rendered the growth of α-lath and -colony. Moreover, the stabilization-annealed colony and basket-weave mixed microstructure still kept the high strength–ductility synergy.
