Effect of pre-strain on microstructure and stamping ability of TA2 titanium alloy and H260 low-alloy steel

Abstract Applying pre-strain can not only change the microstructure and mechanical property of metal material but also affect sheet stamping ability. In this paper, taking H260 low-alloy steel TA2 titanium alloy as experimental materials, ranging from 0 to 0.16 was applied using one-step multi-step method respectively. Microstructure observation, tensile test, bending cup bulging test were conducted on pre-strained samples. Results show that in loading stage, slipping twinning deformation occurs sample while dislocation sliding mainly happens low-alloy. With increasing, product ultimate strength elongation rate gradually decreases, true stress accumulating rarely. The “product yielding rate” be enhanced by applying a 0.04 condition plasticity is still at high level. range - 0.16, with 30.8 °-opening angle completed steel. springback changes negative positive an increase pre-strain. ability very poor, for crack easily occur even original sample. cupping value decreases higher than low constant A quite large difference exists between two materials. Pre-strain pass has no significant effect evolution, properties, properties.