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Twinning-like lattice reorientation without a crystallographic twinning plane

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms4297· OSTI ID:1623934
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [4];  [6];  [6]
  1. 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
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Mississippi State Univ., Mississippi State, MS (United States). Center for Advanced Vehicular Systems
  4. Xi'an Jiaotong Univ., Shaanxi (China). International Center of Dielectric Research
  5. Chongqing Univ. (China). School of Materials Science and Engineering
  6. 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)
  7. 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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Cited By (19)

Characterizing the boundary lateral to the shear direction of deformation twins in magnesium journal June 2016
Three-dimensional character of the deformation twin in magnesium journal July 2019
Deformation twinning mechanism in hexagonal-close-packed crystals journal January 2019
The influence of lamellar twins on deformation mechanism in nanocrystalline magnesium under uniaxial compression journal July 2019
Interface Facilitated Reorientation of Mg Nanolayers in Mg-Nb Nanolaminates journal February 2019
Molecular Dynamics Simulations of the Orientation Effect on the Initial Plastic Deformation of Magnesium Single Crystals journal January 2016
Atomic and electronic basis for the serrations of refractory high-entropy alloys journal June 2017
Atomic simulation of mechanical behavior of Mg in a super-lattice of nanocrystalline Mg and amorphous Mg-Al alloy journal December 2014
Size-dependent plastic deformation of twinned nanopillars in body-centered cubic tungsten journal May 2017
The surface nucleation of tension twin via pure-shuffle mechanism: The energy landscape sampling and dynamic simulations journal May 2018
Study of basal < a > and pyramidal < c + a > slips in Mg-Y alloys using micro-pillar compression journal February 2020
‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending journal October 2017
Magnesium interatomic potential for simulating plasticity and fracture phenomena journal December 2014
Size-Dependent Grain-Boundary Structure with Improved Conductive and Mechanical Stabilities in Sub-10-nm Gold Crystals journal May 2018
Evidence of new twinning modes in magnesium questioning the shear paradigm journal May 2018
Large plasticity in magnesium mediated by pyramidal dislocations journal July 2019
In situ TEM nanomechanics journal January 2015
‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending text January 2017
‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending text January 2017

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