A robust model for creep-fatigue life assessment

Stefan Holmström (Corresponding Author), Pertti Auerkari

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)

Abstract

High temperature components subjected to long term cyclic operation will acquire life-limiting damage from both creep and fatigue. A new robust model for creep-fatigue life assessment is proposed with a minimal set of fitting constants, and without the need to separate creep and fatigue damage or life fractions. The model is based on the creep rupture behaviour of the material with a fatigue correction described by hold time (in tension) and total strain range at temperature. The model is shown to predict the observed creep-fatigue life of ferritic steel P91, austenitic steel 316FR, and Ni alloy A230 with a scatter band close to a factor of 2.
Original languageEnglish
Pages (from-to)333-335
Number of pages3
JournalMaterials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume559
Issue number1
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Fingerprint

fatigue life
Creep
Fatigue of materials
steels
damage
Austenitic steel
Ferritic steel
Fatigue damage
Temperature
temperature

Keywords

  • Creep
  • creep-fatigue
  • life
  • Ni alloy
  • steel

Cite this

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title = "A robust model for creep-fatigue life assessment",
abstract = "High temperature components subjected to long term cyclic operation will acquire life-limiting damage from both creep and fatigue. A new robust model for creep-fatigue life assessment is proposed with a minimal set of fitting constants, and without the need to separate creep and fatigue damage or life fractions. The model is based on the creep rupture behaviour of the material with a fatigue correction described by hold time (in tension) and total strain range at temperature. The model is shown to predict the observed creep-fatigue life of ferritic steel P91, austenitic steel 316FR, and Ni alloy A230 with a scatter band close to a factor of 2.",
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A robust model for creep-fatigue life assessment. / Holmström, Stefan (Corresponding Author); Auerkari, Pertti.

In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 559, No. 1, 2013, p. 333-335.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - A robust model for creep-fatigue life assessment

AU - Holmström, Stefan

AU - Auerkari, Pertti

PY - 2013

Y1 - 2013

N2 - High temperature components subjected to long term cyclic operation will acquire life-limiting damage from both creep and fatigue. A new robust model for creep-fatigue life assessment is proposed with a minimal set of fitting constants, and without the need to separate creep and fatigue damage or life fractions. The model is based on the creep rupture behaviour of the material with a fatigue correction described by hold time (in tension) and total strain range at temperature. The model is shown to predict the observed creep-fatigue life of ferritic steel P91, austenitic steel 316FR, and Ni alloy A230 with a scatter band close to a factor of 2.

AB - High temperature components subjected to long term cyclic operation will acquire life-limiting damage from both creep and fatigue. A new robust model for creep-fatigue life assessment is proposed with a minimal set of fitting constants, and without the need to separate creep and fatigue damage or life fractions. The model is based on the creep rupture behaviour of the material with a fatigue correction described by hold time (in tension) and total strain range at temperature. The model is shown to predict the observed creep-fatigue life of ferritic steel P91, austenitic steel 316FR, and Ni alloy A230 with a scatter band close to a factor of 2.

KW - Creep

KW - creep-fatigue

KW - life

KW - Ni alloy

KW - steel

U2 - 10.1016/j.msea.2012.08.107

DO - 10.1016/j.msea.2012.08.107

M3 - Article

VL - 559

SP - 333

EP - 335

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

IS - 1

ER -