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| 单晶合金蠕变性能影响因素分析 | |
| 引用本文： | 赵萍,杨治国,何清华.单晶合金蠕变性能影响因素分析[J].航空发动机,2009,35(6):32-35. |
| 作者姓名： | 赵萍 杨治国 何清华 |
| 作者单位： | 1. 中南大学,机电工程学院,长沙,410083;中国航空动力机械研究所,湖南株洲,412002 2. 中国航空动力机械研究所,湖南株洲,412002 3. 中南大学,机电工程学院,长沙,410083 |
| 摘 要： | 通过分析热处理工艺、元素含量、晶体取向性以及温度和应力对蠕变性能的影响,得出任何1种影响合金蠕变性能的因素其实质都是改变了合金的微观组织,并最终反映到γ′筏形的完善程度S、终端密度TD和线性密度LD上。S值越接近1,γ′筏形的完善程度越好,蠕变寿命就越长;而TD和LD值越大,微观组织图内筏形交叉和中断的数目就越多,蠕变寿命就越短。 |
| 关 键 词： | 单晶合金 蠕变性能 热处理 元素含量 晶体取向 筏形程度 |
Analysis of Influence Factors on Creep Behavior of Single Crystal Alloy |
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| Authors: | ZHAO Ping YANG Zhi-guo HE Qing-hua |
| Institution: | ZHAO Ping , YANG Zhi-guo, HE Qing-hua (1. Central South University, Changsha410083; Aviation Powerplant Research Institute, Zhuzhou 412002, Hunan, China) |
| Abstract: | The effects of heat treatment technology, element content, crystal orientaition, temperature and stress on the creep behavior were analysed. The influence factors on creep behaveior are considered to be theT＇rofiing integnity S, terminal density TD and linear density LD result from the variation of alloy microscopic structure. With S close to 1, the better γ＇ rafting integnity is, the longer the creep life is. The higher the value of TD and LD is, the more the number of the rafting cross and interruption in the microscopic structure is, the shorter the creep life is. Finally, the recommendations and development trend of EHM system design were presented. |
| Keywords: | single crystal alloy creep behavior heat treatment element content crystal orientation rafting level |
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