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Characterization of Clad Joints of High Strength Low Alloy Steel with Stainless Steel and Titanium
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In the present investigation, a study has been carried out to understand the structure-property correlations in explosive clad joints of high strength low alloy steel (Yield Strength >600 MPa) in as-clad, hot rolled and heat treated conditions. The cladding materials employed were austenitic stainless steel of AISI 347 grade and commercial pure (CP) titanium. An attempt has also been made to realise the structure-property correlations in the clad joint of the HSLA steel with AISI 347 grade austenitic stainless steel produced by weld overlay cladding technique. In explosive cladding, the interface was found to be wavy type and in weld overlay cladding, the interface was flat. Explosive clad joints of HSLA steel + austenitic stainless steel exhibited a bond strength of 491 MPa in as-clad condition and 408 MPa after hot rolling and heat treatment. Explosive clad joint of HSLA steel + CP titanium exhibited a bond strength of 356 MPa in as-clad condition as CP titanium possesses lower strength (337 MPa) compared to that of AISI 347 grade austenitic stainless steel (515 MPa). The weld overlay clad joint exhibited a bond strength of 488 MPa which is almost equal to that of explosive clad joint in as-clad condition. The clad joints of austenitic stainless steel and CP titanium, with the base plate in heat treated condition, exhibited good formability when three point bend tests were conducted upto 114º and 139º respectively.
Keywords
Explosive Cladding, Weld Overlay Cladding, Hsla Steel, Stainless Steel, Microstructure, Shear Bond Strength.
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