Evolution of Internal Stress Field in Ni-Base Superalloy through Creep Deformation

Katsushi Tanaka; T. Kajikawa; T. Ichitsubo; M. Osawa; Tadaharu Yokokawa; Hiroshi Harada

doi:10.4028/www.scientific.net/MSF.475-479.619

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HomeMaterials Science ForumMaterials Science Forum Vols. 475-479Evolution of Internal Stress Field in Ni-Base...

Evolution of Internal Stress Field in Ni-Base Superalloy through Creep Deformation

Abstract:

Internal elastic strain, and its change accompanied with the raft formation during creep deformation in the Ni-based single crystal superalloy (TMS-26) have been investigated by X-ray diffractometry. The elastic strain caused by the lattice misfit between g and g' phases has markedly been changed by creep deformation especially in the directions perpendicular to the [001] tensile axis. The change in the elastic strain can be explained by the effect of creep dislocations stacked at g/g' interfaces. The evolution of the elastic stress field estimated from the elastic strain has explained well the transition from primary creep stage to the second one.

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Materials Science Forum (Volumes 475-479)

Pages:

619-622

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.475-479.619

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Online since:

January 2005

Authors:

Katsushi Tanaka, T. Kajikawa, T. Ichitsubo, M. Osawa, Tadaharu Yokokawa, Hiroshi Harada

Keywords:

Creep, Interfacial Dislocations, Lattice Misfit, Raft Structure

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