Mechanical twinning and detwinning in pure Ti during loading and unloading – An in situ high-energy X-ray diffraction microscopy study

Journal Article · Mon Dec 01 00:00:00 EST 2014 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2014.08.008· OSTI ID:1392049

Wang, L.; Lind, J.; Phukan, H.; Kenesei, P.; Park, J. -S.; Suter, R. M.; Beaudoin, A. J.; Bieler, T. R.

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.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: National Science Foundation (NSF); USDOE Office of Science (SC)
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1392049
• Journal Information: Scripta Materialia, Vol. 92, Issue C; ISSN 1359-6462
• Publisher: Elsevier
• Country of Publication: United States
• Language: English