Determination of plasticity following deformation and welding of austenitic stainless steel

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

卷:701

Article

Acar, Murat O.^1,3  Fitzpatrick, Michael E.^2,3 

[1] Siemens Energy Inc, Hamilton, NJ 08638 USA

[2] Coventry Univ, Ctr Mfg & Mat Engn, Priory St, Coventry CV1 5FB, W Midlands, England

[3] Open Univ, Dept Engn & Innovat, Walton Hall, Milton Keynes MK7 6AA, Bucks, England

关键词: Stainless steel;    Welding;    Plastic strain;    Intergranular stress;   

DOI  :  10.1016/j.msea.2017.06.074

来源: Elsevier

【 摘 要 】

Intergranular strain has been associated with high-temperature cracking of welded pipework in 316H austenitic stainless steel material used in nuclear power plant heat exchangers. In this study, neutron diffraction has been used to study the development of intergranular strains in plastically-deformed and welded 316H stainless steel. Measurements have been made of the intergranular strain evolution with increasing plastic strain in base material, and correlated with further measurements made in samples extracted from welded pipes, where the pipes were welded following plastic deformation to different levels of plastic strain. Strong tensile strain evolution was seen on the compliant 200 grain family. The results were correlated with various proxy measures of plastic strain, including hardness and diffraction peak width, and excellent agreement was obtained.

【 授权许可】

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