期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2015.11.005
关键词
Ti-Nb alloys; Microstructure; Mechanical properties; Martensite transformation
类别
资金
- Promotive Research Fund for Excellent Young and Middle-aged Scientists of Shandong Province [BS2013CL034]
- National Natural Science Foundation of China [51401115]
- Independent Innovation Foundation of Shandong University [GN2013001]
- National Basic Research Program of China (973 Program) [2012CB619405]
- Fundamental Research Funds for the Central Universities [06111020]
- fundamental research fund by State Key Laboratory for Advanced Metals and Materials [2014Z-01]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
Microstructure evolution, mechanical behaviors of cold rolled Ti-Nb alloys with different Nb contents subjected to different heat treatments were investigated. Optical microstructure and phase compositions of Ti-Nb alloys were characterized using optical microscopy and X-ray diffractometre, while mechanical behaviors of Ti-Nb alloys were examined by using tension tests. Stress-induced martensitic transformation in a Ti-30 at%Nb binary alloy was in-situ explored by synchrotron-based high-energy X-ray diffraction (HE-XRD). The results obtained suggested that mechanical behavior of Ti-Nb alloys, especially Young's modulus was directly dependent on chemical compositions and heat treatment process. According to the results of HE-XRD, alpha ''-V1 martensite generated prior to the formation of alpha ''-V2 during loading and a partial reversible transformation from alpha ''-V1 to beta phase was detected while alpha ''-V2 tranformed to beta completely during unloading. (C) 2015 Elsevier B.V. All rights reserved.
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