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This content will become publicly available on October 15, 2018

Title: Determining the strengths of HCP slip systems using harmonic analyses of lattice strain distributions

A robust methodology is presented to extract slip system strengths from lattice strain distributions for polycrystalline samples obtained from high-energy x-ray diffraction (HEXD) experiments with in situ loading. The methodology consists of matching the evolution of coefficients of a harmonic expansion of the distributions from simulation to the coefficients derived from measurements. Simulation results are generated via finite element simulations of virtual polycrystals that are subjected to the loading history applied in the HEXD experiments. Advantages of the methodology include: (1) its ability to utilize extensive data sets generated by HEXD experiments; (2) its ability to capture trends in distributions that may be noisy (both measured and simulated); and (3) its sensitivity to the ratios of the family strengths. The approach is used to evaluate the slip system strengths of Ti-6Al-4V using samples having relatively equiaxed grains. These strength estimates are compared to values in the literature.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [1]
  1. Cornell Univ., Ithaca, NY (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Univ. of Glasgow, Scotland (United Kingdom)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 144; Journal Issue: C; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
Cornell High Energy Synchrotron Source (CHESS); US Department of the Navy, Office of Naval Research (ONR); National Science Foundation (NSF); National Institutes of Health (NIH) - National Institute of General Medical Sciences
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING
OSTI Identifier:
1426773