Anomalous plasticity of body-centered-cubic crystals with non-Schmid effect

Cho, Hansohl; Bronkhorst, Curt A.; Mourad, Hashem M.; Mayeur, Jason R.; Luscher, D. J.

doi:10.1016/j.ijsolstr.2018.01.029

Title: Anomalous plasticity of body-centered-cubic crystals with non-Schmid effect

Journal Article · Tue May 01 00:00:00 EDT 2018 · International Journal of Solids and Structures

DOI:https://doi.org/10.1016/j.ijsolstr.2018.01.029· OSTI ID:1619326

Cho, Hansohl;

; Mourad, Hashem M.; Mayeur, Jason R.; Luscher, D. J.

Plastic deformations in body-centered-cubic (bcc) crystals have been of critical importance in diverse engineering and manufacturing contexts across length scales. Numerous experiments and atomistic simulations on bcc crystals reveal that classical crystal plasticity models with the Schmid law are not adequate to account for abnormal plastic deformations often found in these crystals. Here in this paper, we address a continuum mechanical treatment of anomalous plasticity in bcc crystals exhibiting non-Schmid effects, inspired from atomistic simulations recently reported. Here, specifically, anomalous features of plastic flows are addressed in conjunction with a crystal plasticity model involving two non-Schmid projection tensors widely accepted for representing non-glide components of an applied stress tensor. Further, modeling results on a representative bcc tantalum are presented and compared to experimental data at a range of low temperatures to provide physical insight into deformation mechanisms in these crystals with non-Schmid effects.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC52-06NA25396; LDRD-DR-20170033

OSTI ID:: 1619326

Alternate ID(s):: OSTI ID: 1460646; OSTI ID: 1548732

Report Number(s):: LA-UR-17-21701; S0020768318300313; PII: S0020768318300313

Journal Information:: International Journal of Solids and Structures, Journal Name: International Journal of Solids and Structures Vol. 139-140 Journal Issue: C; ISSN 0020-7683

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 29 works

Citation information provided by
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