| Effect of Alumina Addition on the Microstructure
and Mechanical Properties of Metal Inert
Gas Welded Low Carbon Steel |
S. Sathish1, * and M. Geetha2
Pages : 176-182
DOI : 10.1080/0371750X.2016.1296785 |
| Abstract |
| In this study, influence of alumina addition on weld appearance, microstructure and
mechanical properties of metal inert gas (MIG) welded low carbon mild steel were
emphatically investigated. Experimental results show that all the joints were smooth with
free of cracks. Microstructures of MIG and laser remelted joints show the presence of
columnar and equiaxed dendrites. Furthermore, superior microhardness of MIG welded
joint over alumina added and laser remelted joints is ascribed to the presence of columnar
dendrites. Fractography of the tensile tested alumina added joint exhibited a mixed mode
of ductile and brittle characteristics and this is attributed to the presence of acicular
ferrites and bainite in the microstructure.
[Keywords: Alumina, Laser remelting, Microstructure, Hardness, Fractography] |
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