Three-dimensional character of the deformation twin in magnesium
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Shanghai Jiao Tong Univ. (China)
- Shanghai Jiao Tong Univ. (China)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of Nebraska, Lincoln, NE (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of Nebraska, Lincoln, NE (United States)
Deformation twins are three-dimensional domains, traditionally viewed as ellipsoids because of their two-dimensional lenticular sections. In this work, we performed statistical analysis of twin shapes viewing along three orthogonal directions: the ‘dark side’ (DS) view along the twin shear direction (η1), the twinning plane normal (TPN) view (k1) and the ‘bright side’ (BS) view along the direction λ(=k1 × η1). Our electron back-scatter diffraction results show that twins in the DS and BS views normally exhibit a lenticular shape, whereas they show an irregular shape in the TPN view. Moreover, the findings in the TPN view revealed that twins grow faster along λ the lateral direction than along η1 the forward propagation direction at the initial stages of twin growth. These twin sections are irregular, indicating that growth is locally controlled and the overall shape is not perfectly ellipsoidal. We explain these findings using atomistic models, and ascribe them to differences in the mobility of the edge and screw components of the twinning dislocations.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1558214
- Report Number(s):
- LA-UR-18-31163
- Journal Information:
- Nature Communications, Vol. 10, Issue 1; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Twin hopping in nanolayered Zr-2.5Nb
|
text | January 2020 |
Twin hopping in nanolayered Zr-2.5Nb
|
journal | April 2020 |
Twin hopping in nanolayered Zr-2.5Nb
|
text | January 2020 |
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