Ductility by shear band delocalization in the nano-layer of gradient structure
By Fuh-Gwo Yuan, Dingshun Yan, Jiangda Sun, LingLin Zhou, Yuntian Zhu, Xiaolei Wu. Heterostructured Materials, 2018
138 citations recorded by the source corpus.
ABSTRACT Nanostructured (NS) metals typically fail soon after yielding, starting with the formation of narrow shear bands. Here we report the observation of shear band delocalization in gradient metals. Shear bands were nucleated and delocalized in the NS layers by propagating along the gage length soon after yielding, converting the shear band into a localized strain zone (LSZ). Synergistic work hardening was developed in the LSZ by regaining dislocation hardening capability, and by back-stress hardening from the strain gradients in the axial and depth directions, which helped with enhancing global ductility. GRAPHICAL ABSTRACT
Subfields: Materials Chemistry, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/04914a0005a9a8568650c1dc621e77ac3a865b44
How researchers see this paper
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In Materials Chemistry
- Yuntian Zhu
- Xiaolei Wu
- Yonghao Zhao
- R. Valiev
- Enrique J. Lavernia
- Irene J. Beyerlein
- Hyoung-Seop Kim
- Chong-xiang Huang
In Mechanics of Materials
- Yuntian Zhu
- Xiaolei Wu
- Enrique J. Lavernia
- Irene J. Beyerlein
- Yonghao Zhao
- Chong-xiang Huang
- Yang Cao
- Hyoung-Seop Kim
Citations in the corpus
- Perspective on hetero-deformation induced (HDI) hardening and back stress (2019, methodology): “More recently, back stress has been used to explain the hardening behavior and Bauschinger effect in TRIP steels [47], the transient plastic flow during creep [48], the Bauschinger effect in thin films [38], the hysteresis loop under cyclic loading [49], the extra strain hardening of HS materials [1”
- Dense dispersed shear bands in gradient-structured Ni (2020, background): “The W̄ remains largely constant during the whole plastic straining process, indicating constant SB widths, which contrasts the width growth in gradient IF steel (Yuan et al., 2019).”
- Critical microstructures and defects in heterostructured materials and their effects on mechanical properties (2020, background): “This hypothesis is consistent with the concept of shear band delocalization in HS materials [15,22,43].”
- Heterostructured materials: superior properties from hetero-zone interaction (2020, background): “However, grain growth generally leads to softening, although work hardening may be recovered to some extent after grain growth [22].”