| 大晶粒TiAl基合金的超塑性变形行为 |
| |
| 引用本文： | 孙锋,林栋樑.大晶粒TiAl基合金的超塑性变形行为[J].上海交通大学学报,2001,35(3):380-384. |
| |
| 作者姓名： | 孙锋 林栋樑 |
| |
| 作者单位： | 上海交通大学材料科学与工程学院, |
| |
| 基金项目： | 国家自然科学基金资助项目(59895150) |
| |
| 摘 要： | 研究了大晶粒Ti-47％Al-2％Mn-2％Nb-1％B合金的高温变形行为.该合金具有近等轴γ组织，其间均匀分布着少量极细的α2相.测试在空气中进行，试样用釉涂覆加以保护，温度为1025～1100℃，初始应变速率范围为(0.04～1.28)×10
|
| 关 键 词： | 超塑性变形 连续回复 再结晶 钛铝合金 高温变形 应变速率 晶粒细化 |
| 文章编号： | 1006-2467(2001)03-0380-05 |
| 修稿时间： | 2000年5月17日 |
Superplastic Deformation
in a Large-Grained TiAl Based Alloy |
| |
| SUN Feng,LIN Dong-liang.Superplastic Deformation
in a Large-Grained TiAl Based Alloy[J].Journal of Shanghai Jiaotong University,2001,35(3):380-384. |
| |
| Authors: | SUN Feng LIN Dong-liang |
| |
| Abstract: | High temperature deformation behavior was investigated systematically in a large-grained Ti47％Al-2％Mn-2％Nb-1％B alloy having nearly equiaxed γ phase, in which fine particles of a2 distribute uniformly. Specimens coated with enamel are tested in air at 1 025℃～1 100℃ and the initial strain rates of 4×10-5～1.28×10-3s-1. The TiAl alloy exhibits all deformation characteristics of conventionally finegrained superplastic materials, without the prerequisites of fine grain size and grain boundary sliding. In most cases, an elongation of more than 200% can be obtained. A maximum elongation of 287.5％ with an m value of 0.39 is obtained at 1 100℃ and initial strain rate of 4×10-5s-1 under the condition of uniform deformation. Significant refining of the original grain size is observed during and after superplastic deformation. |
| |
| Keywords: | TiAl alloy superplastic deformation continuous recovery and recrystallization |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
