GH33A合金热机械循环塑性性能

基金项目:

本课题由冶金部资助

详细信息

Thermal Mechanical Cyclic Plastic Bebavior of GH33A Supperalloy

摘要: 针对GH33A高温合金材料在温度与机械应变同时交变条件下的热机械循环塑性性能,就相位差对该材料在热机械循环状态下的循环硬化、循环软化和疲劳寿命的影响进行分析和讨论.结果表明:相位差影响材料的循环硬化与软化;在570~825℃的温度交变条件下,同相热机械疲劳寿命比反相热机械疲劳寿命短。
- 塑性 /
- 相位差 /
- 热机械疲劳 /
- 循环硬化 /
- 循环软化
Abstract: The cyclic plastical bebavior of GH33A supperalloy is investigated under the condition of simultaneous cycle of temperature and mechanical strain. Influance of phase difference of alternating temperature and mechanical strain(in-phase and out-of-phase) on cyclic softening or cyclic hardening and thermal mechanical fatigue life is studied. The experimental results show that the damage in in-phase thermal machanical fatigue is more serious than that in out-of-phase at 570~825℃.And, the material is serious cyclic softening at high temperature side and first cyclic hardening, then cyclic softening at low temperature side for both in-phase and out-of-phase in thermal mechanical fatigue.
- plasticity /
- phase shift /
- themal mechanical fatigue /
- cyclic hardening /
- cyclic softening