arXiv Open Access 2018

Two-phase model of the polycrystalline aggregate with account for grain-boundary states under quasi-static deformation

Alexander A. Reshetnyak Yurii P. Sharkeev

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Abstrak

The statistical theory of flow stress, including yield strength, for polycrystalline materials under quasi-static plastic deformation suggested in [arxiv:1803.08247[cond-mat.mtr-sci], arxiv:1805.08623[cond-mat.mtr-sci]] is developed in the framework of a two-phase model. Analytic and graphic forms of the generalized Hall-Petch relations are obtained for samples with BCC (α-phase Fe), FCC (Cu, Al, Ni) and HCP (α-Ti, Zr) crystalline lattices at T=300K with different values of grain-boundary (second) phase. The maximum of yield strength and respective extremal grain size of the samples are shifted by changing of the second phase. Temperature dependence in the range 100-350K for yield strength (using the example of Al) revealed its increase for closely packed nano-crystalline samples with the growth of temperature. An enlargement of the second phase in a sample neutralizes this property.

Topik & Kata Kunci

cond-mat.mes-hall cond-mat.soft cond-mat.stat-mech

Penulis (2)

Alexander A. Reshetnyak

Yurii P. Sharkeev

Format Sitasi

APA MLA BibTeX

Reshetnyak, A.A., Sharkeev, Y.P. (2018). Two-phase model of the polycrystalline aggregate with account for grain-boundary states under quasi-static deformation. https://arxiv.org/abs/1809.03628

Akses Cepat

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Informasi Jurnal

Tahun Terbit: 2018
Bahasa: en
Sumber Database: arXiv
Akses: Open Access ✓