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Microstructural and Mechanical Properties of 308 and 409 Stainless Steel Welded by GTAW Process

Published online by Cambridge University Press:  26 February 2014

R. Saldaña-Garcés ,
A. F. Miranda-Pérez ,
G. Y. Pérez-Medina ,
Y. N. Barrón-Vargas  and
F. A. Reyes-Valdés
R. Saldaña-Garcés
Affiliation:
Corporación Mexicana de Investigación en Materiales. Saltillo, Coahuila. Mé[email protected]
A. F. Miranda-Pérez
Affiliation:
Corporación Mexicana de Investigación en Materiales. Saltillo, Coahuila. Mé[email protected]
G. Y. Pérez-Medina
Affiliation:
Corporación Mexicana de Investigación en Materiales. Saltillo, Coahuila. Mé[email protected]
Y. N. Barrón-Vargas
Affiliation:
Corporación Mexicana de Investigación en Materiales. Saltillo, Coahuila. Mé[email protected]
F. A. Reyes-Valdés
Affiliation:
Corporación Mexicana de Investigación en Materiales. Saltillo, Coahuila. Mé[email protected]
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Abstract

Today, stainless steel is widely used in automotive industry due to its high impact resistance, corrosion resistance and light weight. This paper present the research carried out to study the differences between microstructure and mechanical properties of 409 and 308 stainless steel sheets, each joints by gas tungsten arc welding (GTAW). For each of weldments, detailed analysis was conducted on the chemical composition, microstructure characteristics and mechanical properties of base metal (BM), heat affected zone (HAZ) and fusion zone (FZ). Scanning electron microscopy (SEM) and optical microscopy were used to analyze microstructural changes and mechanical properties, including microhardness and tensile test. This study can be a practical guide in the selection of other materials in order to determine the important to use in structural automotive industry.

Keywords

stainless steelGTAWmicrostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1616: Symposium S5C – Structural and Chemical Characterization of Metals, Alloys, and Compounds - 2013 , 2014 , imrc2013-s5c-o033
Copyright
Copyright © Materials Research Society 2014 

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