Journal
SCRIPTA MATERIALIA
Volume 92, Issue -, Pages 35-38Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2014.08.008
Keywords
High-energy X-ray diffraction microscopy; Titanium; In situ mechanical testing; Twinning; Detwinning
Categories
Funding
- NSF at Michigan State University [DMR-1108211, DMR-0710570]
- U.S. Department of Energy [DESC0002001]
- [DE-AC02-06CH11357]
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Far-field high-energy X-ray diffraction microscopy (HEDM) was used to study {10 (1) over bar2} ((1) over bar 011) twinning in Ti. Twin nucleation within a bulk parent grain is observed at a resolved shear stress (RSS) of 225 MPa. During unloading, the RSS on the twin plane reversed sign, providing a driving force for detwinning. Formation of the twin, however, prevented the parent grain from returning to its original stress state even after complete unloading. The twin morphology and surrounding environment were examined using near-field HEDM. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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