镍基单晶高温合金γ基体相通道研究
Study on γ Matrix Phase Channels in Nickel-based Single Crystal Superalloy
陈忠 1田庚方 1李天富 1王子军 1陈东风1
作者信息
- 1. 中国原子能科学研究院,北京 102413
- 折叠
摘要
镍基单晶合金在高温下具备良好的力学性能,是航空航天及核能领域的关键材料.通过对铸态、力加载及热处理状态的变化研究了第三代镍基单晶高温合金DD10 的γ基体相通道演化,并对铸态样品利用四圆中子衍射做了单晶性检测.结果表明,DD10 在[200]、[020]、[002]晶面的单晶性能良好;经力加载和热处理后γ基体相通道有序性增加,通道宽度增加,且在力加载的γ基体相通道中析出二次沉淀强化相;900℃热处理后,γ基体相通道中的Co、Cr元素含量显著增加,在相同的竖直通道中Co元素含量一致;在相同的水平通道中Cr元素含量则保持一致;Mo、Re、W等微量元素经热处理后更多的从γ基体相通道中进入到沉淀强化相中.
Abstract
Nickel-based single crystal superalloys have excellent mechanical properties at high temperature and are key materials in the aerospace and nuclear fields.The γ channel evolution of the third-generation nickel-based single crystal superalloy DD10 was investigated by examining the changes in the as-cast,force loaded,and heat-treated states.The single crystal properties of the as-cast sample were also tested using four-circle neutron diffraction.The results show that DD10 has good single crystal properties on the[200],[020]and[002]crystal faces.The ordering of the γ matrix channels and the channel width increase after force loading and heat treatment,and secondary precipitates strengthen the γ matrix channels under loading.After heat treatment at 900℃,the Co and Cr element contents in the γ matrix channels significantly increase,and the Co element content is consistent in the same vertical channels.The Cr element content is consistent in the same horizontal channels.Trace elements such as Mo,Re,and W enter more into the precipitation-strengthened phase from the γ matrix channels after heat treatment.
关键词
镍基单晶高温合金/中子衍射/γ基体相通道/热处理Key words
nickel-based single crystal superalloy/neutron diffraction/γ-matrix channels/heat treatment引用本文复制引用
基金项目
国家自然科学基金(12075320)
中核集团领创项目(LC202309000301)
原子能院院长基金(YZ202312000720)
出版年
2024
NETL
NSTL
万方数据