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Title: Tension/compression asymmetry in creep behavior of a Ni-based superalloy

Abstract

Orientation and temperature dependence of yield stress or CRSS (Critical Resolved Shear Stress) and tension/compression anisotropy of the yield stress of CRSS have been shown by Shah and Duhl, Heredia and Pope, and Miner et al. Tension/compression asymmetry in the yield strength of Ni-based superalloys has been explained in terms of the core width effect. Shah and Duhl observed the tension/compression asymmetry in creep deformation, which is similar to that observed in the yield strength, and indicated that it can be attributed to cross slip and dislocation core-constriction mechanisms associated with octahedral slip. However, little is known about the mechanism of tension/compression asymmetry in creep. In the present study, single crystals of a Ni-base superalloy were subjected to tensile and compressive creep tests. Tension/compression asymmetry in creep behavior was examined in detail for each orientation.

Authors:
 [1]
  1. Tokyo Metropolitan Univ., Hachioji, Tokyo (Japan). Dept. of Mechanical Engineering
Publication Date:
OSTI Identifier:
691329
Resource Type:
Journal Article
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 41; Journal Issue: 5; Other Information: PBD: 6 Aug 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CREEP; NICKEL BASE ALLOYS; MONOCRYSTALS; ASYMMETRY; STRESSES; SLIP; DISLOCATIONS; ORIENTATION

Citation Formats

Kakehi, K. Tension/compression asymmetry in creep behavior of a Ni-based superalloy. United States: N. p., 1999. Web. doi:10.1016/S1359-6462(99)00191-8.
Kakehi, K. Tension/compression asymmetry in creep behavior of a Ni-based superalloy. United States. doi:10.1016/S1359-6462(99)00191-8.
Kakehi, K. Fri . "Tension/compression asymmetry in creep behavior of a Ni-based superalloy". United States. doi:10.1016/S1359-6462(99)00191-8.
@article{osti_691329,
title = {Tension/compression asymmetry in creep behavior of a Ni-based superalloy},
author = {Kakehi, K.},
abstractNote = {Orientation and temperature dependence of yield stress or CRSS (Critical Resolved Shear Stress) and tension/compression anisotropy of the yield stress of CRSS have been shown by Shah and Duhl, Heredia and Pope, and Miner et al. Tension/compression asymmetry in the yield strength of Ni-based superalloys has been explained in terms of the core width effect. Shah and Duhl observed the tension/compression asymmetry in creep deformation, which is similar to that observed in the yield strength, and indicated that it can be attributed to cross slip and dislocation core-constriction mechanisms associated with octahedral slip. However, little is known about the mechanism of tension/compression asymmetry in creep. In the present study, single crystals of a Ni-base superalloy were subjected to tensile and compressive creep tests. Tension/compression asymmetry in creep behavior was examined in detail for each orientation.},
doi = {10.1016/S1359-6462(99)00191-8},
journal = {Scripta Materialia},
number = 5,
volume = 41,
place = {United States},
year = {1999},
month = {8}
}