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

Cited 18 time in webofscience Cited 0 time in scopus
  • Hit : 193
  • Download : 0
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. 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. 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. (C) 2018 Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2018-05
Language
English
Article Type
Article
Keywords

BCC TRANSITION-METALS; NON-GLIDE STRESSES; SINGLE-CRYSTALS; SCREW DISLOCATIONS; CRYSTALLOGRAPHIC TEXTURE; CORE STRUCTURE; FCC METALS; POLYCRYSTALLINE METALS; ORIENTATION DEPENDENCE; CONSTITUTIVE MODEL

Citation

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, v.139, pp.138 - 149

ISSN
0020-7683
DOI
10.1016/j.ijsolstr.2018.01.029
URI
http://hdl.handle.net/10203/246953
Appears in Collection
AE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 18 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0