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

Song, Yuxuan and Ma, Yi and Chen, Haofeng and He, Zhibo and Chen, Hu and Zhang, Taihua and Gao, Zengliang (2021) The effects of tensile and compressive dwells on creep-fatigue behavior and fracture mechanism in welded joint of P92 steel. Materials Science and Engineering: A, 813. 141129. ISSN 0921-5093

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    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.

    ORCID iDs

    Song, Yuxuan, Ma, Yi, Chen, Haofeng ORCID logoORCID: https://orcid.org/0000-0001-6864-4927, He, Zhibo, Chen, Hu, Zhang, Taihua and Gao, Zengliang;