Twinning-like lattice reorientation without a crystallographic twinning plane
- Xi'an Jiaotong Univ., Shaanxi (China). State Key Lab. for Mechanical Behavior of Materials. Hysitron Applied Research Center in China (HARCC). Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano); DOE/OSTI
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Mississippi State Univ., Mississippi State, MS (United States). Center for Advanced Vehicular Systems
- Xi'an Jiaotong Univ., Shaanxi (China). International Center of Dielectric Research
- Chongqing Univ. (China). School of Materials Science and Engineering
- Xi'an Jiaotong Univ., Shaanxi (China). State Key Lab. for Mechanical Behavior of Materials. Hysitron Applied Research Center in China (HARCC). Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano)
- Xi'an Jiaotong Univ., Shaanxi (China). State Key Lab. for Mechanical Behavior of Materials. Hysitron Applied Research Center in China (HARCC). Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Materials Science and Engineering. Dept. of Nuclear Science and Engineering
Twinning on the {$$10\bar{1}2$$} plane is a common mode of plastic deformation for hexagonal-close-packed metals. Here we report, by monitoring the deformation of submicron-sized single-crystal magnesium compressed normal to its prismatic plane with transmission electron microscopy, the reorientation of the parent lattice to a ‘twin’ lattice, producing an orientational relationship akin to that of the conventional {$$10\bar{1}2$$} twinning, but without a crystallographic mirror plane, and giving plastic strain that is not simple shear. Aberration corrected transmission electron microscopy observations reveal that the boundary between the parent lattice and the ‘twin’ lattice is composed predominantly of semi-coherent basal/ prismatic interfaces instead of the {$$10\bar{1}2$$} twinning plane. The migration of this boundary is dominated by the movement of these interfaces undergoing basal/prismatic transformation via local rearrangements of atoms. This newly discovered deformation mode by boundary motion mimics conventional deformation twinning but is distinct from the latter and, as such, broadens the known mechanisms of plasticity.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Science Foundation (NSF); National Natural Science Foundation of China (NSFC); 973 Program of China; 111 Project of China
- Grant/Contract Number:
- AC52-06NA25396; W-7405-ENG-36
- OSTI ID:
- 1623934
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 5; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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