| 微量Hf对变形TiAl合金组织和力学性能的影响 |
| |
| 引用本文： | 昌霞,韩鹏彪,司家勇,张继. 微量Hf对变形TiAl合金组织和力学性能的影响[J]. 沈阳黄金学院学报, 2009, 0(1): 60-63 |
| |
| 作者姓名： | 昌霞 韩鹏彪 司家勇 张继 |
| |
| 作者单位： | 北京钢铁研究总院,北京100081 |
| |
| 基金项目： | 国家高技术研究发展计划（863计划） |
| |
| 摘 要： | 对比观察含Hf和不含Hf的TiAl合金的变形组织和热处理组织，发现在1310℃／1h／AC热处理后均获得近全层片组织，平均晶粒尺寸为50～70μm，γ相的体积分数为12％左右；退火温度升高至1320℃，则均获得了全层片组织，平均层片团尺寸为200～300μm．在同为近全层片组织下进行力学性能试验发现：添加合金元素Hf，使TiAl合金800℃高温拉伸强度提高60MPa和800℃，150MPa应力持久寿命由84h提高到128h．
|
| 关 键 词： | 微量Hf 近层片组织 高温性能 钛铝合金 |
Effects of minor Hafnium addition on microstructures and mechanical properties of forgingγ- TiAl |
| |
| CHANG Xia,HAN Peng-biao,SI Jia-yong,ZHANG Ji. Effects of minor Hafnium addition on microstructures and mechanical properties of forgingγ- TiAl[J]. , 2009, 0(1): 60-63 |
| |
| Authors: | CHANG Xia HAN Peng-biao SI Jia-yong ZHANG Ji |
| |
| Affiliation: | (Central Iron and Steel Research Institute, Beijing 100081, China) |
| |
| Abstract: | Forging and subsequent heat treatment microstructures of y - TiM were investigated to assess the effect of minor hafnium. It was found that near full lamellar microstructures with cluster size in 50 - 70μm were obtained by annealing at 1 310 ℃, and the volume fraction ofy phase was 12% . Full lamellar microstructures cluster size is 200 300 μm when the annealing temperature increased to 1 320℃. The mechanical properties were tested in the material with near full lamellar. The results showed that ultimate tensile strength increased by 60 MPa at 800 ℃ , and the life of stress endurance encreased from 84 h to 128 h at endurance 150 MPa condition due to the hafnium addition in the studied TiAl alloy. |
| |
| Keywords: | minor Hf near full lamellar high temperature properties TiAl alloy |
| 本文献已被 维普 等数据库收录！ |
