The effects of tensile and compressive dwells on creep-fatigue behavior and fracture mechanism in welded joint of P92 steel

Yuxuan Song, Yi Ma, Haofeng Chen, Zhibo He, Hu Chen, Taihua Zhang, Zengliang Gao

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The creep-fatigue interactions on the long-term service damage of P92 welded joint were investigated on the tensile and compressive holdings with a series of applied strains, respectively. The local mechanical properties including hardness, elastic modulus and creep resistance of welded joint were uncovered using nanoindentation. The features of fracture morphology and internal defects after CF tests were studied by scanning electron mi- croscope. Based on the characteristic of microstructural evolution and the variation in local mechanical prop- erties, holding type effects of creep-fatigue interaction on the local creep behavior and fracture mechanism of the welds were systematically investigated.
Original languageEnglish
Article number141129
Number of pages30
JournalMaterials Science and Engineering: A
Volume813
Early online date27 Mar 2021
DOIs
Publication statusPublished - 5 May 2021

Keywords

  • P92 steel welded joint
  • creep-fatigue interaction
  • nanoindentation
  • creep
  • fracture

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