Journal Article

Characterization of microstructure, chemical composition, and toughness of a multipass welded joint of austenitic stainless steel AISI316L

Tümer, Mustafa, Yılmaz, Ramazan

2016

Overview

In this study, AISI 316 types of austenitic stainless steels were welded by FCAW (flux-cored arc welding) using E316LT1-1/4 flux-cored wire under various shielding gas mixtures containing CO 2 at different ratios. Effects of mixed ratio of Ar and CO 2 in the in the shielding gas on the microstructure, impact toughness, and microhardness of welded materials were studied. Stereo optical microscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscope (TEM), and TEM/mapping analysis techniques were used for microstructural characterizations. The impact toughness values of the weldments were decreased as a result of the formation and growth of inclusions in the microstructure due to the increases amount of CO 2 in the shielding gas. The hardness values and δ-ferrite amount in the weld metal were affected by depending on of the shielding gas mixtures.

• Publisher: Springer London,Springer Nature B.V
• Subject: Arc welding / Austenitic stainless steels / CAE) and Design / Carbon dioxide / Chemical composition / Computer-Aided Engineering (CAD / Delta ferrite / Energy transmission / Engineering / Flux core wire welding / Flux cored wires / Gas mixtures / Impact strength / Inclusions / Industrial and Production Engineering / Mapping / Mechanical Engineering / Media Management / Microhardness / Microscopy / Microstructure / Optical microscopy / Organic chemistry / Original Article / Scanning electron microscopy / Shielding / Toughness / Transmission electron microscopy / Weld metal / Welded joints / Welding fluxes / Weldments