Abstract
A novel α+β dual-phase Ti-9 V-1Fe alloy with twinning induced plasticity effect is developed in this work. {332}<113> twinning plays a momentous role in the plastic deformation, and effectively enhances the uniform elongation. The alloy displays a considerable mechanical performance including yield strength of 890 MPa and uniform elongation strain of 19 %. {332}<113> twin traversing α precipitate leads to a shear in the precipitate, and Burgers orientation relationship is achieved between {332}<113> twins and some specific α variants. Moreover, the shear releases the stress concentration induced by twinning shear stress field acting on α precipitate, which makes {332}<113> twinning be a compatible deformation between α precipitate and β matrix. The strategy of introducing TWIP effect into α+β dual-phase Ti alloys demonstrated in this work may serve as a new method for the development of high performance Ti alloys.
Published Version
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