Microstructure and texture heterogeneity of a hot-rolled near-alpha titanium alloy sheet

作者：Lin Peng^*; Sun Ying; Zhang Shuzhi; Zhang Changjiang; Wang Chengpeng; Chi Chengzhong

来源：Materials Characterization, 2015, 104: 10-15.

DOI：10.1016/j.matchar.2015.03.026

• Titanium alloy
• Microstructure
• Texture
• Heterogeneity
• Recrystallization

In order to realize microstructure and property control during thermo-mechanical processing of titanium alloys, the microstructure and texture of a hot-rolled near-alpha titanium alloy sheet were investigated. Results show that the sheet exhibits strong microstructure and texture heterogeneity. Supposing the Bunge Euler angle (0 degrees, 0 degrees, 0 degrees) orientation has [11 (2) over bar0] directions parallel to the rolling direction and the basal plane is parallel to the rolling plane: a) macrozones showing grain orientation of (0 degrees, 90 degrees, 30 degrees) are observed along the rolling direction in regions with few) beta phase particles; b) the recovery or recrystallization degree of grains with crystal orientations of (0 degrees, 90 degrees, 30 degrees), (30 degrees, 90 degrees, 30 degrees) and (70 degrees, 90 degrees, 0-30 degrees) in turn increased, showing the dependence of the recovery or recrystallization degree on grain orientation; and c) dislocation substructure ingrains with different recrystallization degrees exhibits various patterns, including dislocation tangles, polygonization, arrays, nets, and subgrain boundaries.

• 出版日期2015-6
• 单位太原理工大学