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Journal of Materials Engineering and Performance

Erschienen in:

19.08.2016

Microstructure and Low-Temperature Mechanical Properties of 304 Stainless Steel Joints by PAW + GTAW Combined Welding

verfasst von: Kun Liu, Yajiang Li, Juan Wang

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 10/2016

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Abstract

The combined double-pass process of plasma arc welding (PAW) + gas tungsten arc welding (GTAW) was performed on 304 austenitic stainless steel with the thickness of 12 mm. Results indicated that two different morphologies of ferrite (e.g., lathy δ-ferrite and skeletal δ-ferrite) were formed within the austenite matrix in PAW weld metal (PAW-WM). GTAW weld metal (GTAW-WM) was mainly composed of fine austenite and skeletal δ-ferrite. In transition zone between PAW-WM and GTAW-WM, epitaxial growth contributed to cellular dendritic crystals transforming into columnar crystals. The tensile strength of joint is about 700 MPa. The impact toughness of WM varied from 281 J (20 °C) to 122 (−196 °C), while the impact toughness of heat-affected zone (HAZ) varied from 205 J (20 °C) to 112 J (−196 °C).

Vorheriger Artikel Dependence of Microstructure on Solution and Aging Treatment for Near-β Forged TA15 Ti-Alloy

Nächster Artikel Experimental Study on the Machining of Inclined Holes for Thermal Barrier-Coated Nickel Superalloys by EDM

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Titel: Microstructure and Low-Temperature Mechanical Properties of 304 Stainless Steel Joints by PAW + GTAW Combined Welding
verfasst von: Kun Liu
Yajiang Li
Juan Wang
Publikationsdatum: 19.08.2016
Verlag: Springer US
Erschienen in: Journal of Materials Engineering and Performance / Ausgabe 10/2016
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI: https://doi.org/10.1007/s11665-016-2288-9

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