摘要
基于最大降低相界面能密度原理,本文推导了一般应力状态下镍基单晶合金的强化相γ'筏化准则,给出了筏化图,并得到试验结果的验证,进而定量分析了核化过程;利用该准则即最大相界面能密度降低,可以很好地描述蠕变性能的晶体取向相关性,并初步得到试验结果的验证.
Based on the relief of interfacial energy density by dislocation generation at the r-r'interfaces, a rafting prediction criterion has been developed for nickel-base single crystals under multiaxialstresses. The diagrams of rafting have been presented, and confirmed by experimental results. The raftingprocess has been analyzed quantitively by the relief of interfacial energy. The criterion has been appliedto study the creep behavior. The example of creep life analysis shows that the criterion can be correlatedsatisfactorily to the crystallographic orientation dependence of creep behavior.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第6期585-588,共4页
Acta Metallurgica Sinica
基金
国家自然科学基金!59501009
航空科学基础研究基金
关键词
筏化准则
蠕变
晶体取向相关性
镍基单晶合金
rafting prediction criterion, multiaxial stress state, crystallographic orientation dependence, creep behavior, nickel-base single crystal superalloy