Open AccessMicrostructural investigation of Ni based cladding developed on austenitic SS-304 through microwave irradiation
Author(s) -
Ajit M. Hebbale,
M. S. Srinath
Publication year - 2016
Publication title -
journal of materials research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.832
H-Index - 44
eISSN - 2214-0697
pISSN - 2238-7854
DOI - 10.1016/j.jmrt.2016.01.002
Subject(s) - materials science , scanning electron microscope , microstructure , metallurgy , carbide , indentation hardness , microwave , cladding (metalworking) , energy dispersive x ray spectroscopy , porosity , austenite , intermetallic , optical microscope , composite material , alloy , physics , quantum mechanics
The stainless steel SS-304 is used to produce turbine blades in some of the hydraulic power plants. It has excellent corrosion resistance and forming characteristics. In the present investigation, the nickel based clads were developed through microwave energy using domestic microwave oven equipped with 900W power at 2.45GHz frequency. The developed clads were characterized through optical metallography, scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and porosity. Microstructure study revealed that microwave clads are free from visible interfacial cracks and porosity is significantly less at approximately 0.87%. The various complex metal carbides and intermetallics were found through XRD analysis. The distribution of metal carbides and intermetallics are the clearest indication for the improvement of hardness. The average microhardness of the developed clad surface is 364±70HV
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