Multiscale modeling of crystal plastic deformation of polycrystalline titanium at high temperatures

Liu, Xia; Sun, Weihua; Liew, K.M.

doi:10.1016/j.cma.2018.06.026

Cited by 8 publications

(1 citation statement)

References 36 publications

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“…The initiation of crack at microscopic scale is a dynamic process, which results in difficulties on study of mechanism about deformation and cracking, these defects are known playing a fundamental role in the deformation of materials. Multiscale method has been applied to study deformation behavior of polycrystal with single aluminum [13] and titanium element respectively [14]. It is necessary to carefully examine the revolution of defects and its influence on the fracture process at atomic scale.…”

Section: Introductionmentioning

confidence: 99%

Micromechanism of Cold Deformation of Two-Phase Polycrystalline Ti–Al Alloy with Void

Feng

Wang

et al. 2019

Materials

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Cold deformation behavior of polycrystalline metallic material is affected by intrinsic defects such as dislocations, voids, inclusions etc. Existing studies on α2(Ti3Al) + γfalse(TiAlfalse) 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 Ti3Al is more deformable; (2) In plastic stage, γ 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 α2/γ phase have significant detraction to strength.

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Section: Introductionmentioning

confidence: 99%