Micromechanism of Cold Deformation of Two-Phase Polycrystalline Ti–Al Alloy with Void
School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
Authors to whom correspondence should be addressed.
Received: 27 November 2018 / Revised: 25 December 2018 / Accepted: 3 January 2019 / Published: 7 January 2019
Cold deformation behavior of polycrystalline metallic material is affected by intrinsic defects such as dislocations, voids, inclusions etc. Existing studies on
two-phase Ti–Al alloy cover about deformation behavior mainly on macro scale. This paper focuses on the cold deformation mechanism of two-phase Ti–Al alloy at micro scale, and the role of voids in deformation process. Molecular dynamics simulations were performed to study the evolution of micro structure of material under uniaxial tension. Interaction between spherical nano voids with different size and position was also examined in the simulation. The results show that (1) In elastic stage, deformation of the two-phase is coordinated, but
is more deformable; (2) In plastic stage,
phase is the major dislocation source in two-phase alloy; (3) voids detracts the strength of the two-phase alloy, while the position of void affect the degree of this subtraction, voids located at the boundary of
phase have significant detraction to strength.
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MDPI and ACS Style
Feng, R.; Wang, M.; Li, H.; Qi, Y.; Wang, Q.; Rui, Z. Micromechanism of Cold Deformation of Two-Phase Polycrystalline Ti–Al Alloy with Void. Materials 2019, 12, 184.
Feng R, Wang M, Li H, Qi Y, Wang Q, Rui Z. Micromechanism of Cold Deformation of Two-Phase Polycrystalline Ti–Al Alloy with Void. Materials. 2019; 12(1):184.
Feng, Ruicheng; Wang, Maomao; Li, Haiyan; Qi, Yongnian; Wang, Qi; Rui, Zhiyuan. 2019. "Micromechanism of Cold Deformation of Two-Phase Polycrystalline Ti–Al Alloy with Void." Materials 12, no. 1: 184.
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