TY - JOUR
T1 - On the elastic accommodation between the structural units in the LPSO structures
AU - Gu, Xinfu
AU - Furuhara, Tadashi
N1 - Publisher Copyright:
© 2014 The Japan Institute of Metals and Materials.
PY - 2014
Y1 - 2014
N2 - Long range periodic stacking ordered (LPSO) structures in magnesium alloy consist of regular arrangements of four layer height fcc structural units separated by several Mg layers paralleling to the base plane. The shear transformation of the structural units from hcp structure involves large transformation strain. This strain can be significantly accommodated by the combination of the structure units with different shears. In addition, the possible lowest elastic energy configuration in both R and H type of LPSO structure is obtained. For H type LPSO structure, the opposite shear directions (or Burgers vectors of the partial dislocations) are operated in nearest structural units, while all three types of shear directions are operated successively in the nearest structural units for R type LPSO structure. This study also intends to discuss the inter spacing between the structural units in terms of the elastic interaction. It is found the elastic interaction alone cannot rationalize the spacing between the structural units.
AB - Long range periodic stacking ordered (LPSO) structures in magnesium alloy consist of regular arrangements of four layer height fcc structural units separated by several Mg layers paralleling to the base plane. The shear transformation of the structural units from hcp structure involves large transformation strain. This strain can be significantly accommodated by the combination of the structure units with different shears. In addition, the possible lowest elastic energy configuration in both R and H type of LPSO structure is obtained. For H type LPSO structure, the opposite shear directions (or Burgers vectors of the partial dislocations) are operated in nearest structural units, while all three types of shear directions are operated successively in the nearest structural units for R type LPSO structure. This study also intends to discuss the inter spacing between the structural units in terms of the elastic interaction. It is found the elastic interaction alone cannot rationalize the spacing between the structural units.
KW - Elastic accommodation
KW - Elastic interaction
KW - Long range periodic stacking ordered structure
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U2 - 10.2320/matertrans.MAW201420
DO - 10.2320/matertrans.MAW201420
M3 - Article
AN - SCOPUS:84908232213
SN - 1345-9678
VL - 55
SP - 1662
EP - 1667
JO - Materials Transactions
JF - Materials Transactions
IS - 11
ER -