Paper Title:
Microstructural and Textural Aspects of Shear Banding in Plane Strain Deformed Fcc Metals
  Abstract

Periodic crystal lattice rotations within compact clusters of shear bands, developed in copper, have been characterized over a range of scales by optical microscopy, high resolution FEG-SEM-EBSD and TEM orientation mapping, to examine the role of local lattice re-orientation on slip propagation across pre-existing barriers to dislocation motion. Two different cases were analysed in detail. The single crystal analysis addresses the relation between the crystallographic microtexture and microstructure development due to the crystal anisotropy after a strain path change. All the changes in strain path directly lead to crystallite subdivisions and strain localization in the form of macroscopically visible bands of different morphology at the micro scale. The elongated cell substructure formed during primary straining was the source of anisotropy after changing deformation path. It is thought that the presence of this structure (here subcells) as barriers to dislocation motion is crucial for the occurrence of shear banding. The analysis of pure polycrystalline copper has been focused on the influence of local lattice re-orientations within particular grains on slip propagation across grain boundaries. The crystal lattice rotated in such a way that one of the {111} slip planes became nearly parallel to the direction of maximum shear (due to the actual state of anisotropy). A natural consequence of this rotation was the formation of a specific microtexture which facilitated slip propagation across grain boundaries.

  Info
Periodical
Solid State Phenomena (Volume 160)
Edited by
H. Klein and R.A. Schwarzer
Pages
257-264
DOI
10.4028/www.scientific.net/SSP.160.257
Citation
H. Paul, "Microstructural and Textural Aspects of Shear Banding in Plane Strain Deformed Fcc Metals", Solid State Phenomena, Vol. 160, pp. 257-264, 2010
Online since
February 2010
Authors
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Dorothée Dorner, Ludger Lahn, Stefan Zaefferer
Abstract:A silicon steel single crystal with {110}<001> Goss orientation was cold rolled up to 89 % thickness reduction and subsequently annealed. The...
129
Authors: Leonardo Lagoeiro, Paola Ferreira, Cristiane Castro
Abstract:In this study we analysed microstructures and determined [c]-axis textures of quartz crystals in veins formed parallel to composition...
57
Authors: Minoru Furukawa, Yukihide Fukuda, Keiichiro Oh-ishi, Z. Horita, Terence G. Langdon
Abstract:This paper describes experiments in which high purity copper single crystals of two different orientations were processed for one pass by...
113
Authors: Minoru Furukawa, Z. Horita, Terence G. Langdon
Abstract:High purity aluminum (Al) and copper (Cu) single crystals of different crystallographic orientations were processed for one pass by...
1946
Authors: Ping Yang, Y.Y. Shao, W.M. Mao, Q.W. Jiang, W.X. Jin
Chapter 6: Materials
Abstract:The texture evolution in the surface and center layer of hot rolled electrical steel containing initial columnar grains with their...
754