摘要
在不同的热处理温度和变形条件下,研究了二代单晶DD5合金的再结晶组织随温度的变化规律以及对力学性能的影响。结果表明,经过吹砂处理后的试样,在高于1050℃热处理后就出现了再结晶,初始再结晶以胞状组织呈现,随着热处理温度的提高,再结晶逐渐转变为再结晶晶粒层;干吹砂后的再结晶层明显比水吹砂的厚。研究发现,含有再结晶层试样的拉伸和持久性能较标准试样有不同程度的下降,其下降程度随着试验温度升高而增加。
The evolution of recrystallized microstructure and the change of mechanical properties with different heat-treatment temperature and deformation were studied for the second generation single crystal superalloy DD5.The results showed that the recrystallization occurred in the grit blasted sample at heat-treatment temperatures higher than 1050°C.At the initial stage the recrystallization texture was characterized by cellular morphology of recrystallization,and then,with the increase of heat-treatment temperature,it was transformed into recrystallized layer.The recrystallization depth for grit blasted samples was thicker than water-grit blasted ones.It was found that the tensile property and stress-rupture property of the superalloy DD5 was decreased with the recrystallized layer,and the higher the heat-treatment temperature,the stronger the decreasing extent.
出处
《航空材料学报》
EI
CAS
CSCD
北大核心
2011年第5期1-5,共5页
Journal of Aeronautical Materials
关键词
单晶高温合金
DD5
再结晶组织
力学性能
single-crystal superalloy
DD5
recrystallization（RX） microstructure
mechanical properties
