Correlation analysis between time-dependent creep crack-tip stress and constraint effect on creep crack initiation time

Seung Ho Lee, Hyun Woo Jung, Yun Jae Kim, Kamran Nikbin, Robert A. Ainsworth

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, to qualify the constraint effect on creep crack initiation, the correlation analysis between proposed constraint parameter Q' using time-dependent creep crack-tip stress and creep crack initiation time variable Ai was performed. Ai implies the influence of constraint effect on creep crack initiation. The procedure to calculate the Ai and the Q'-parameter was presented. To evaluate various status of constraint effect, creep crack growth tests for twenty-one compact tension specimens of Type 316H stainless steel at 550oC were investigated. The results of correlation analysis explain the reason for the different initiation time at the same C* level in respect of constraint effect.

Original languageEnglish
Title of host publicationMaterials and Fabrication
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791883860
DOIs
Publication statusPublished - 2020
EventASME 2020 Pressure Vessels and Piping Conference, PVP 2020 - Virtual, Online
Duration: 2020 Aug 3 → …

Publication series

NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Volume6
ISSN (Print)0277-027X

Conference

ConferenceASME 2020 Pressure Vessels and Piping Conference, PVP 2020
CityVirtual, Online
Period20/8/3 → …

Keywords

  • Constraint effect
  • Creep crack initiation
  • Creep crack initiation time variable
  • Time-dependent creep crack-tip stress

ASJC Scopus subject areas

  • Mechanical Engineering

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