ODS-MGH956合金再结晶处理后的晶粒组织与持久性能的关系

INFLUENCE OF POST RECRYSTALLIZATION PROCESS ON GRAIN STRUCTURE AND STRESS-RUPTURE PROPERTY OF ALLOY ODS-MGH956

本文介绍试验研究再结晶处理对ODS-MGH956合金组织及其对持久性能的影响。试验结果表明,再结晶温度超过1200 ℃时才能得到明显可见的定向排列晶粒组织,而且再结晶组织的晶粒纵横比(L/D)对合金的高温持久性能有明显的影响。对应于最好持久性能的最佳晶粒纵横比为4～6。

The influence of recrystallization process on the grain structure which in turn on the stress-rupture property of alloy ODS-MGH956 was investigated in the present work. The experimental results indicated that only when the recrystallization temperature was over 1200℃ did the arrays of crystalline orientation evidently display. The effect of Grain Aspect Ratio (GAR) of recrystallization structure on the high temperature stress-rupture property of the alloy was remarkable. The optimum GAR values 4-6 correspon...