摘要
镍基单晶高温合金涡轮叶片缘板杂晶的出现严重影响叶片的力学性能,导致叶片报废。综述了关于缘板杂晶的形成本质的研究,总结了不同影响因素对缘板杂晶形成的影响及原因并概况了几种不同杂晶的控制方法,指出了以往研究中存在的问题,展望了未来研究的方向。
Stray grains (SGs) in the platform region of the Ni-base single crystal turbine blades are deleterious to the mechanical properties in service, therefore the formation of SG may directly cause the rejection of the castings. This paper reviews the researches on the origin, mechanism and influencing factors of stray grain formation in the platform region. Several controlling techniques and their mechanism on SG control are also summarized. The current existing problem and future research aspects are stated and discussed as well.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2017年第9期118-122,共5页
Materials Reports
基金
国家973项目(2011CB610406)
国家863项目(2012AA03A511)
国家自然科学基金(51171151
51331005
51501151)
陕西省自然科学基金(2014JM6227)
关键词
镍基单晶高温合金
涡轮叶片
杂晶
机理
影响因素
控制方法
Ni-base single crystal superalloy, turbine blade, stray grain, mechanism, influencing factor, controlling technique