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。
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.
出处
《航空发动机》
2009年第6期32-35,共4页
Aeroengine
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
single crystal alloy
creep behavior
heat treatment
element content
crystal orientation
rafting level
