期刊
INTERMETALLICS
卷 29, 期 -, 页码 110-115出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2012.05.007
关键词
Nickel aluminides; based on NiAl; Alloy design; Creep; Brittleness and ductility; Phase diagram; prediction
资金
- Department of Energy (DOE), Office of Fossil Energy Program [91039S09-I]
- Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy
Two critical issues restricting the applications of NiAl precipitate-strengthened ferritic steels are their poor room temperature ductility and insufficient creep resistance at temperatures higher than 600 degrees C. In this study, a thermodynamic modeling approach is integrated with experiments focused on investigating the ductility and creep resistance of steel alloys based on the Fe-Ni-Al-Cr-Mo multi-component system. The mechanical property studies showed that the creep resistance increases with increasing the volume fraction of B2-ordered precipitates, while the opposite trend was observed for the ductility. Low solubility of Al in the alpha-Fe matrix was found to favor a ductility increase. Thermodynamic calculations were used to predict the volume fraction of B2-ordered precipitate and the elemental partitioning to guide the selection of alloy compositions that might exhibit the balanced creep resistance and ductility. Key experiments were then conducted to validate the prediction. This integrated approach was found to be very effective in the alloy development. (C) 2012 Elsevier Ltd. All rights reserved.
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