Multi-phase-field lattice Boltzmann modeling and simulations of semi-solid simple shear deformation

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia Pub Date : 2024-11-19 DOI:10.1016/j.mtla.2024.102295

Namito Yamanaka , Shinmei Hayase , Shinji Sakane , Tomohiro Takaki

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Abstract

Semi-solid deformation is a versatile phenomenon that occurs during the solidification of alloys. Semi-solid simple shear deformation is simulated using the multi-phase-field lattice Boltzmann (MPF-LB) method, which has been originally devised to capture polycrystalline solidification accompanied with melt flow and solid motion. MPF-LB simulations of semi-solid simple shear deformation, with variations in solid fractions, reveal the transition from a liquid-like behavior to a solid-like one. Especially, the shear band formed via dilatancy effects is thoroughly examined in the high solid fraction region. The relationship between grain rearrangement and mechanical behaviors during the formation process of the shear band is investigated in detail. In addition, the effect of domain size and initial grain arrangement on shear band formation is evaluated. Finally, the mechanism of shear band formation is clarified. The developed MPF-LB simulation method is promising for comprehensive evaluations of semi-solid deformation.

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半固态简单剪切变形的多相场晶格玻尔兹曼建模与模拟

半固态变形是合金凝固过程中出现的一种多变现象。半固态简单剪切变形采用多相场晶格玻尔兹曼（MPF-LB）方法进行模拟，该方法最初是用来捕捉伴随着熔体流动和固体运动的多晶凝固现象。MPF-LB 模拟了半固态简单剪切变形以及固体分数的变化，揭示了从液态行为到固态行为的转变。特别是在高固体分数区域，通过扩张效应形成的剪切带得到了深入研究。详细研究了剪切带形成过程中晶粒重排与力学行为之间的关系。此外，还评估了畴尺寸和初始晶粒排列对剪切带形成的影响。最后，阐明了剪切带形成的机理。所开发的 MPF-LB 模拟方法有望用于半固体变形的综合评估。

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来源期刊

Materialia MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.40

自引率

2.90%

发文量

345

审稿时长

36 days

期刊介绍： Materialia is a multidisciplinary journal of materials science and engineering that publishes original peer-reviewed research articles. Articles in Materialia advance the understanding of the relationship between processing, structure, property, and function of materials. Materialia publishes full-length research articles, review articles, and letters (short communications). In addition to receiving direct submissions, Materialia also accepts transfers from Acta Materialia, Inc. partner journals. Materialia offers authors the choice to publish on an open access model (with author fee), or on a subscription model (with no author fee).