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-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:813

Article

Song, Yuxuan^1,2  Ma, Yi¹  Chen, Haofeng³  He, Zhibo^1,2  Chen, Hu⁵  Zhang, Taihua⁶  Gao, Zengliang^1,2,4 

[1] Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Peoples R China

[2] Zhejiang Univ Technol, Coll Mech Engn, Inst Proc Equipment & Control Engn, Hangzhou 310014, Peoples R China

[3] Univ Strathclyde, Dept Mech & Aerosp Engn, Glasgow G1 1XJ, Lanark, Scotland

[4] Minist Educ, Engn Res Ctr Proc Equipment & Remfg, Hangzhou, Peoples R China

[5] Ningbo Special Equipment Inspect & Res Inst, Ningbo 315000, Peoples R China

[6] Beihang Univ, Inst Solid Mech, Beijing 100191, Peoples R China

关键词: P92 steel welded joint;    Creep-fatigue interaction;    Nanoindentation;    Creep;    Fracture;   

DOI  :  10.1016/j.msea.2021.141129

来源: Elsevier

【 摘 要 】

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 microscope. Based on the characteristic of microstructural evolution and the variation in local mechanical properties, holding type effects of creep-fatigue interaction on the local creep behavior and fracture mechanism of the welds were systematically investigated.

【 授权许可】

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