材料工程Issue(7)：24-28,5.
FGH96合金热挤压棒材超塑性研究
Study on Superplasticity of Extruded FGH96 Alloy
王淑云 1张敏聪 1东赟鹏 1刘趁意 1陈由红 1孙兴1
作者信息
摘要
Abstract
The superplasticity of extruded FGH96 alloy was studied. The results show that the extruded FGH96 alloy exhibits excellent superplasticity at temperatures of 1050℃ and 1100℃. Superplastic elongation rate reaches 405% and flow stress is decreased to 32MPa at temperature of 1100℃ with the initial strain rate of 3. 33 × ℃-4s-1. The metallographic analysis indicates that the relatively large size of γ' phase and the large distance between different γ' phases in FGH96 alloy can promote dynamic re-crystallization, and the grain growth can be restrained in the subsequent deformation. Evident dynamic recrystallization in FGH96 alloy has been occurred during the extrusion deformation. But due to the insufficient dynamic recrystallization in extrusion deformation, a large quantity of substructures still exists in the interior of the grain. The unstable substructures would cause finer, stable and uniform grains, the mean size of which is about 10μm, through dynamic recovery and dynamic recrystallization in superplastic deformation, thus resulting in excellent superplasticity of FGH96 alloy.
关键词
FGH96合金/挤压/超塑性Key words
FGH96 alloy/ extrusion/ superplasticity分类
矿业与冶金引用本文复制引用
王淑云,张敏聪,东赟鹏,刘趁意,陈由红,孙兴..FGH96合金热挤压棒材超塑性研究[J].材料工程,2012,(7):24-28,5.
