Creep rupture behavior of welded Grade 91 steel

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:669

Article

Shrestha, Triratna¹  Basirat, Mehdi²  Alsagabi, Sultan¹  Sittiho, Anumat¹  Charit, Indrajit¹  Potirniche, Gabriel P.² 

[1] Univ Idaho, Dept Chem & Mat Engn, Moscow, ID 83844 USA

[2] Univ Idaho, Dept Mech Engn, Moscow, ID 83844 USA

关键词: Grade 91 steel;    Ferritic-martensitic steel;    Welding;    Creep rupture;    Fractography;   

DOI  :  10.1016/j.msea.2016.05.065

来源: Elsevier

【 摘 要 】

Creep rupture behavior of fusion welded Grade 91 steel was studied in the temperature range of 600 - 700 degrees C and at stresses of 50-200 MPa. The creep data were analyzed in terms of the Monkman-Grant relation and Larson-Miller parameter. The creep damage tolerance factor was used to identify the origin of creep damage. The creep damage was identified as the void growth in combination with micro structural degradation. The fracture surface morphology of the ruptured specimens was studied by scanning electron microscopy and deformed microstructure examined by transmission electron microscopy, to further elucidate the rupture mechanisms. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

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