Dynamic and Static Spherical Mechanisms of α Phase in Near α Titanium Alloy with Erbium
WANG Tongbo1,2,*, LI Bolong2, QI Peng1,2, WANG Yunpeng1, MO Yongda1, LOU Huafen1
1 Chinalco Research Institute of Science and Technology Co., Ltd., Beijing 102209, China 2 School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China
Abstract: The scientific issue was investigated for the spherical mechanisms of α phase in near α titanium alloy with erbium, aimed to preparate the α phase with random crystal orientation. A novel high temperature titanium alloy with erbium was studied to clarify the micro-structural evolution on the thermal mechanical conditions. Meanwhile, the micro-structure model was established to clarify the dynamic and static spherical mechanisms of α phase. During the thermal-mechanical deformation, the spherical mechanism of lamellar α colony was the continuous dynamic recrystallization, controlled by the mechanical rotation of the sub-grain followed by dislocation climbing and annihilation by diffusion. During the thermal process, the static spheroidization was developed on basics of the β inserted model. During the thermal-mechanical deformation, the sub-structure was induced by the interaction between the slipping dislocation with b of 1/3[2112]. And then, the mis-orientation was increased to develop to the dynamic recrystallization. During the thermal process, the static spherical process, the equiaxial αp grains and retained β transformed microstructures were prepared. Furthermore, retained β transformed microstructures consisted of β phase and secondary αs lamellar with the thickness of 30 nm.
王同波, 李伯龙, 亓鹏, 王云鹏, 莫永达, 娄花芬. 含铒近α型高温钛合金中α相的动/静态球化机制[J]. 材料导报, 2024, 38(17): 23100083-6.
WANG Tongbo, LI Bolong, QI Peng, WANG Yunpeng, MO Yongda, LOU Huafen. Dynamic and Static Spherical Mechanisms of α Phase in Near α Titanium Alloy with Erbium. Materials Reports, 2024, 38(17): 23100083-6.
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2024, Vol. 38 
