Image-based mechanism explanation of creep-fatigue fracture of alloy 617 at high temperature

F. Tahir, Y. Liu

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

Abstract

Creep-fatigue damage in Alloy 617 was investigated through novel hybrid-control tests at 950C with force-controlled dwell periods at intermediate stress levels. An image-based analysis of cracks and voids in failed specimens was performed to distinguish between creep-dominated and fatigue-dominated failure. It was demonstrated that traditional creep-fatigue tests with strain-controlled dwell periods are not capable of producing creep-dominated failure. Moreover, it is shown that the classical time fraction rule for calculating creep damage that is suggested in ASME draft code case for Alloy 617 is not a valid indicator of creep damage.

Original languageEnglish (US)
Title of host publicationICF 2017 - 14th International Conference on Fracture
EditorsEmmanuel E. Gdoutos
PublisherInternational Conference on Fracture
Pages451-452
Number of pages2
ISBN (Electronic)9780000000002
StatePublished - 2017
Event14th International Conference on Fracture, ICF 2017 - Rhodes, Greece
Duration: Jun 18 2017Jun 20 2017

Publication series

NameICF 2017 - 14th International Conference on Fracture
Volume1

Conference

Conference14th International Conference on Fracture, ICF 2017
CountryGreece
CityRhodes
Period6/18/176/20/17

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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