期刊
MATERIALS CHARACTERIZATION
卷 165, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2020.110378
关键词
Superalloy; Heat treatment; gamma ' precipitate; Eutectic phase; Creep behavior
类别
资金
- Power Generation & Electricity Delivery of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) [20181110100310]
- Ministry of Trade, Industry and Energy, Korea
- Fundamental Research Program of the Korea Institute of Materials Science (KIMS) [PNK6120]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20181110100310] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Council of Science & Technology (NST), Republic of Korea [PNK6120] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The evolution of microstructures caused by heat treatment on Ni-based superalloy CM 247 LC was examined, and the creep behaviors were analyzed at various temperature and stress conditions. Secondary gamma' hardly precipitated in aged specimens subjected to solution treatment, but secondary gamma' precipitated in specimen subjected to two-step aging at 1080 degrees C and 871 degrees C without solution treatment, because the size and volume fraction of precipitated gamma' particles and the width of the gamma' channel depend on the heat-treatment path. The creep properties of the specimen subjected to two-step aging without solution heat treatment under low temperature and high stress was the best, owing to the uniform deformation and damage-relieving effect of the fine secondary gamma' particles in the. channel and the eutectic gamma/gamma' phase. At and above 871 degrees C, the effect of gamma' rafting on the creep properties was very important, and the creep lifetimes of the solution-treated specimens with better rafting were longer than those of the aged specimens.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据