Abstract
The effect of rolling temperatures on the interface microstructure and mechanical properties is investigated using 2-mm-thick TA1/Q235B composite sheets, which were prepared after nine passes of hot rolling of explosive welded plates. The results show that the vortex region and the transition layer exist in the interface at the explosive welded plate, while only the transition layer exists in the interface after hot rolling. The transition layer is composed of α-Ti, TiC, Fe, and FeTi, and the thickness increases with the increasing rolling temperature. The microhardness of the explosive welded plate is higher than that of the hot-rolling sheet, and the microhardness of interface are higher than that of matrix metals. The interface shear strength and tensile elongation of the hot-rolled sheet increase with the increasing hot rolling temperature, while the ultimate tensile strength (UTS), yield strength (YS) and Young modulus decrease with the increase of hot rolling temperature. The shear strength of sheets is related to the interfacial compounds, and the tensile strength is mainly affected by the grain morphology of the matrix.
Highlights
As an important metal-based material, bimetallic composite sheets have been widely used in petroleum, chemical, metallurgy, light industry, electric power, seawater desalination, shipbuilding, marine engineering, and other industries due to their unique physical chemical and mechanical properties [1,2,3,4,5,6,7].As an efficient welding method, explosive welding has been widely used in preparing heterogeneous metal composite plates [8,9,10]
High pressure can reduce the residual stress of the structure, reducing the deformation during explosive welding [11,12,13]
Explosive welding is not limited by the shape and area of materials
Summary
As an efficient welding method, explosive welding has been widely used in preparing heterogeneous metal composite plates [8,9,10]. The high pressure forces the different metals to achieve close contact at atomic level, promoting an excellent metallurgical combination. At the bonding interface of the two metal plates, the high pressure caused by the explosion provides energy for the joint process, and causes the flyer plate to impact with the base. Explosive welding is not limited by the shape and area of materials. This method can combine the excellent properties of different materials to obtain high bonding strength and good machining performance
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