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Title: Determining heterogeneous slip activity on multiple slip systems from single crystal orientation pole figures

A new experimental method to determine heterogeneity of shear strains associated with crystallographic slip in the bulk of ductile, crystalline materials is outlined. The method quantifies the time resolved evolution of misorientation within plastically deforming crystals using single crystal orientation pole figures (SCPFs) measured in-situ with X-ray diffraction. A multiplicative decomposition of the crystal kinematics is used to interpret the distributions of lattice plane orientation observed on the SCPFs in terms of heterogeneous slip activity (shear strains) on multiple slip systems. Here, to show the method’s utility, the evolution of heterogeneous slip is quantified in a silicon single crystal plastically deformed at high temperature at multiple load steps, with slip activity in sub-volumes of the crystal analyzed simultaneously.
Authors:
 [1] ;  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Cornell Univ., Ithaca, NY (United States). Sibley School of Mechanical and Aerospace Engineering; Cornell Univ., Ithaca, NY (United States). Cornell High Energy Synchrotron Source (CHESS)
Publication Date:
Report Number(s):
LLNL-JRNL-679683
Journal ID: ISSN 1359-6454
Grant/Contract Number:
AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 116; Journal Issue: C; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE; National Science Foundation (NSF); National Institutes of Health (NIH)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1438797
Alternate Identifier(s):
OSTI ID: 1351011