Creep Behaviors of a Single Crystal Nickel-Based Superalloy Containing 4.2%Re
By the measurement of creep curves and microstructure observation, an investigation has been made into the creep behaviors and microstructure evolution of a single crystal nickel-based superalloy containing 4.2％Re. Results show that the superalloy displays an obvious sensibility on the applied temperatures and stresses in the range of the applied temperatures and stresses. During the initial creep, the cubical γ′ phase in the alloy is transformed into an N-type rafted structure along the direction vertical to the applied stress axis. After crept up to fracture, the rafted γ′ phase in the region near fracture is transformed into a twisted configuration. The dislocation climbing over the rafted γ′ phase is considered to be the main deformation mechanism of the alloy during the steady creep state, and dislocations shear into the rafted γ′ phase is the main deformation mechanism of the alloy in the later stage of creep.
Single crystal nickel-based superalloy rhenium microstructure evolution creep behavior deformation features
TIAN Sugui QIAN Benjiang LIANG Fushun LI Anan YU Xingfu
Shenyang University of Technology, Shenyang 110870, China
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
276-281
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）