Microstructure Evolution and Analysis of A Single Crystal Nickel-Based Superalloy During Tensile Creep

摘要：

By means of the finite element method (FEM) for calculating the von Mises stress and strain energy density in the cubic γ/γ′ phases, the regularity of γ′ phase directional growth is investigated. Results show that the change of the strain energy density in the different planes of the cubical γ′ phase occurs during tensile creep of alloy, the cubical γ′ phase is directionally grown, along the crystal plane with bigger strain energy, to transform into the mesh-like rafted structure along the direction perpendicular to the applied stress axis. The change of the atomic potential energy, interfacial energy and lattice misfit stress is thought to be the driving force for promoting the elements diffusion and directional growth of γ′ phase.

关键词： Single crystal superalloy microstructure evolution creep FEM analysis

作者: Shu Zhang Sugui Tian Yong Su Benjiang Qian

作者单位: Shenyang University of Technology, Shenyang 110870, China Shenyang University of Chemical Technology Shenyang University of Technology, Shenyang 110870, China

会议类型: 国际会议

会议名称: 11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)

会议地点: 青岛

会议语种:英文

页码: 154-158

在线出版日期: 2010-09-25（万方平台首次上网日期，不代表论文的发表时间）