ISSN: 1546-962X
CODEN: JAIOAD
Published Online: 4 January 2012
Page Count: 9

Mechanical and Microstrutural Characterization of Weldments of Ferritic Stainless Steel AISI 444 Using Austenitic Stainless Steels Filler Metals

Antunes, Pedro Duarte
Institute of Mechanical Engineering, Federal Univ. of Itajubá, UNIFEI,

Corrêa, Edmilson Otoni
Institute of Mechanical Engineering, Federal Univ. of Itajubá, UNIFEI,

Barbedo, Nancy Delducca
Institute of Mechanical Engineering, Federal Univ. of Itajubá, UNIFEI,

Souza, Paola de Oliveira
Institute of Mechanical Engineering, Federal Univ. of Itajubá, UNIFEI,

Gonçalves, José Luiz
Institute of Mechanical Engineering, Federal Univ. of Itajubá, UNIFEI,

Diacenco, Adriana Amaro
Institute of Mechanical Engineering, Federal Univ. of Itajubá, UNIFEI,

(Received 16 October 2010; accepted 1 December 2011)

Abstract

The objective of this study was to investigate the influence of the filler metal on the microstructure and mechanical properties of ferritic stainless steel AISI 444 welded using two types of filler metal of austenitic stainless steel. Microstructure examinations showed that in both welded joints grain growth occurred in the heat affected zone (HAZ). The results also showed that the fusion zone of the weld joints using E309L filler metal presented a discontinuous network of delta ferrite unlike the fusion zone of the weld joint using E316L. Tensile tests showed that the failures of specimens always occurred in the HAZ and that the weldments using E316L filler metal presented tensile strength lower than that of the weldment using E309L filler metal. In the fusion zone of the weldments using E316L filler metal, values for hardness were found to be higher than those found in the fusion zone of the E309L filler metal.

Keywords:
welded joints, stainless steel AISI 444, microstructure

Paper ID: JAI103436
DOI: 10.1520/JAI103436
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