Twinning-induced dislocation and coordinated deformation behavior of a high-Nb TiAl alloy during high-cycle fatigue

• Main Authors: Xu, Xuesong, Ding, Hongsheng, Huang, Haitao, Liang, He, Ramanujan, Raju V., Chen, Ruirun, Guo, Jingjie, Fu, Hengzhi
• Other Authors: School of Materials Science and Engineering
• Format: Article
• Language: English
• Published: 2023
• Subjects: Engineering::Materials; Fatigue; Twinning
• Online Access: https://hdl.handle.net/10356/172153
• Institution: Nanyang Technological University

The deformation mechanism responsible for the high-cycle rotating bending fatigue of a high-Nb TiAl alloy was investigated. Fatigue deformation in the γ phase was dominated by superlattice dislocations [0 1 1¯] and twinning. Dislocations 〈1 1 0〉 in the B2 phase can be induced by twins in the adjacen...