期刊
SCRIPTA MATERIALIA
卷 142, 期 -, 页码 96-100出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2017.08.029
关键词
Titanium; X-ray Diffraction; Slip System; Crystal Plasticity
类别
资金
- U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- Materials and Manufacturing Directorate of the U.S. Air Force Research Laboratory
- National Science Foundation
- National Institutes of Health/National Institute of General Medical Sciences under NSF award [DMR-1332208]
Full stress tensors of over four hundred individual grains in a titanium alloy specimen (Ti-7Al) are tracked during continuous uniaxial deformation through the elasto-plastic transition at 355 degrees C. The experiment is facilitated by a unique radiative heating furnace and load frame designed for in-situ high-energy X-ray diffraction measurements. Average strengths of multiple slip system families are calculated directly from the ensemble grain stress data. Results show that elevated temperature lowers the strength of basal slip systems relative to prismatic slip systems, reduces the degree of flow softening due to precipitate shearing, and decreases the first-order pyramidal slip system work-hardening rate. Published by Elsevier Ltd.
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