Effect of multi-axial stress state on creep behavior and stress rupture life of a Ni-based DS superalloy

Jia Huang; Duoqi Shi; Xiaoguang Yang; Xiaoan Hu

doi:10.1016/j.commatsci.2013.12.026

Effect of multi-axial stress state on creep behavior and stress rupture life of a Ni-based DS superalloy

Jia Huang
, Duoqi Shi^*
, Xiaoguang Yang
, Xiaoan Hu

^*Corresponding author for this work

School of Energy and Power Engineering

Beihang University

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Effect of multi-axial stress state on creep behavior and stress rupture life of a Ni-based directionally solidified (DS) superalloy has been systematically investigated. Emphasis is placed on the roles of the applied net section stress level, initial theoretical stress concentration factor (K _t), notch shape, plate thickness and sample shape. The results show that creep behavior is obviously affected by all the mentioned factors, which are concretely embodied in the redistribution of stresses, accumulation of creep strains and evolution of creep damage. The indicators for describing the constraint degree are further quantitatively discussed and the tri-axiality factor I₁/σ_Mises is exhibited as a good indicator. Based on the Monkman-Grant relationship, the stress rupture lives of notched specimens are predicted, which are related to the constraint degree and agree well with the existing experimental laws.

Original language	English
Pages (from-to)	20-31
Number of pages	12
Journal	Computational Materials Science
Volume	85
DOIs	https://doi.org/10.1016/j.commatsci.2013.12.026
State	Published - 1 Apr 2014

Keywords

Constraint degree
Creep
Multi-axial stress state
Ni-base DS superalloy
Notch
Stress rupture life

Access to Document

10.1016/j.commatsci.2013.12.026

Cite this

@article{361155f0e794492e99c4f07e4f687c86,

title = "Effect of multi-axial stress state on creep behavior and stress rupture life of a Ni-based DS superalloy",

abstract = "Effect of multi-axial stress state on creep behavior and stress rupture life of a Ni-based directionally solidified (DS) superalloy has been systematically investigated. Emphasis is placed on the roles of the applied net section stress level, initial theoretical stress concentration factor (K t), notch shape, plate thickness and sample shape. The results show that creep behavior is obviously affected by all the mentioned factors, which are concretely embodied in the redistribution of stresses, accumulation of creep strains and evolution of creep damage. The indicators for describing the constraint degree are further quantitatively discussed and the tri-axiality factor I1/σMises is exhibited as a good indicator. Based on the Monkman-Grant relationship, the stress rupture lives of notched specimens are predicted, which are related to the constraint degree and agree well with the existing experimental laws.",

keywords = "Constraint degree, Creep, Multi-axial stress state, Ni-base DS superalloy, Notch, Stress rupture life",

author = "Jia Huang and Duoqi Shi and Xiaoguang Yang and Xiaoan Hu",

year = "2014",

month = apr,

day = "1",

doi = "10.1016/j.commatsci.2013.12.026",

language = "英语",

volume = "85",

pages = "20--31",

journal = "Computational Materials Science",

issn = "0927-0256",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Effect of multi-axial stress state on creep behavior and stress rupture life of a Ni-based DS superalloy

AU - Huang, Jia

AU - Shi, Duoqi

AU - Yang, Xiaoguang

AU - Hu, Xiaoan

PY - 2014/4/1

Y1 - 2014/4/1

N2 - Effect of multi-axial stress state on creep behavior and stress rupture life of a Ni-based directionally solidified (DS) superalloy has been systematically investigated. Emphasis is placed on the roles of the applied net section stress level, initial theoretical stress concentration factor (K t), notch shape, plate thickness and sample shape. The results show that creep behavior is obviously affected by all the mentioned factors, which are concretely embodied in the redistribution of stresses, accumulation of creep strains and evolution of creep damage. The indicators for describing the constraint degree are further quantitatively discussed and the tri-axiality factor I1/σMises is exhibited as a good indicator. Based on the Monkman-Grant relationship, the stress rupture lives of notched specimens are predicted, which are related to the constraint degree and agree well with the existing experimental laws.

AB - Effect of multi-axial stress state on creep behavior and stress rupture life of a Ni-based directionally solidified (DS) superalloy has been systematically investigated. Emphasis is placed on the roles of the applied net section stress level, initial theoretical stress concentration factor (K t), notch shape, plate thickness and sample shape. The results show that creep behavior is obviously affected by all the mentioned factors, which are concretely embodied in the redistribution of stresses, accumulation of creep strains and evolution of creep damage. The indicators for describing the constraint degree are further quantitatively discussed and the tri-axiality factor I1/σMises is exhibited as a good indicator. Based on the Monkman-Grant relationship, the stress rupture lives of notched specimens are predicted, which are related to the constraint degree and agree well with the existing experimental laws.

KW - Constraint degree

KW - Creep

KW - Multi-axial stress state

KW - Ni-base DS superalloy

KW - Notch

KW - Stress rupture life

UR - https://www.scopus.com/pages/publications/84892703063

U2 - 10.1016/j.commatsci.2013.12.026

DO - 10.1016/j.commatsci.2013.12.026

M3 - 文章

AN - SCOPUS:84892703063

SN - 0927-0256

VL - 85

SP - 20

EP - 31

JO - Computational Materials Science

JF - Computational Materials Science

ER -

Effect of multi-axial stress state on creep behavior and stress rupture life of a Ni-based DS superalloy

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this