Distribution of rhenium in a single crystal nickel-based superalloy
Received 10 May 2010; received in revised form 15 July 2010; accepted 19 July 2010. published online 26 July 2010.
Scanning transmission electron microscopy and energy dispersive X-ray spectroscopy have been utilized to investigate the distribution of Re in a single crystal nickel-based superalloy. Two types of distributions of element Re have been found near interfaces after creep tests, one in the γ phases, the other near dislocation cores. Re enrichment near dislocation cores is considered to strengthen the high-temperature performance of superalloys by hindering dislocation movement.
aBeijing National Center for Electron Microscopy, Laboratory of Advanced Materials, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
bNational Key Laboratory of Science and Technology on Advanced High Temperature Structural Materials, Beijing Institute of Aeronautical Materials, Beijing 100095, People’s Republic of China
ABSTRACT