scholarly journals Origin of phase stability in Fe with long-period stacking order as an intermediate phase in cyclic γ−ε martensitic transformation

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Takao Tsumuraya ◽  
Ikumu Watanabe ◽  
Takahiro Sawaguchi
Keyword(s):  
Martensitic Transformation ◽  
Phase Stability ◽  
Intermediate Phase ◽  
Long Period ◽  
Stacking Order

scholarly journals Ab initioinvestigation of monoclinic phase stability and martensitic transformation in crystalline polyethylene

2018 ◽  
Vol 2 (7) ◽  
Author(s):  
Pär A. T. Olsson ◽  
Per Hyldgaard ◽  
Elsebeth Schröder ◽  
Elin Persson Jutemar ◽  
Eskil Andreasson ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Phase Stability ◽  
Monoclinic Phase ◽  
Crystalline Polyethylene

DIRECT OBSERVATION OF THE PERIOD OF ALLOYS WITH LONG‐PERIOD STACKING ORDER

1966 ◽  
Vol 9 (3) ◽  
pp. 101-103 ◽  
Author(s):  
Robert S. Toth ◽  
Hiroshi Sato
Keyword(s):  
Direct Observation ◽  
Long Period ◽  
Stacking Order

Effect of Long-Period Stacking Order Phase and α-Mg Phase on Strength and Ductility of Mg-Zn-Y Alloy

2012 ◽  
Vol 706-709 ◽  
pp. 1237-1242 ◽  
Author(s):  
Masafumi Noda ◽  
Yoshihito Kawamura
Keyword(s):  
Mechanical Properties ◽  
Yield Strength ◽  
High Temperatures ◽  
Mg Alloys ◽  
Tensile Yield Strength ◽  
Block Type ◽  
Lpso Phase ◽  
Long Period ◽  
Stacking Order ◽  
Type Phase

Mg alloys are lightweight structural alloys that normally have a good castability and machinability as well as an excellent specific strength and rigidity. However, the mechanical properties of Mg alloys are inferior to those of Al alloys, and their range of industrial applications is limited. Recently, Mg–Zn–Y alloy has been found to show a high tensile yield strength with a good elongation. The alloy has a long-period stacking order (LPSO) phase as the secondary phase in an α-Mg phase. In general, the tensile yield strengths of LPSO-type Mg alloy are known to be markedly enhanced by the formation of kink bands in the LPSO phase and by microstructural refinement of the α-Mg phase during plastic deformation. The separate roles of the LPSO phase and the α-Mg phase in relation to the mechanical properties of high-strength LPSO-type Mg alloy were investigated at ambient and high temperatures. For high strengths at ambient and high temperatures, it was important that the α-Mg phase consisted of a fine-grain region and a nonrecrystallized region, and that the LPSO phase remained as a block-type phase. On the other hands, it was necessary to change the LPSO phase from a block-type phase into a plate-type phase by heat treatment before tensile testing to improve the ductility of the alloy while maintaining its tensile yield strength. Microstructural control of the LPSO phase and the α-Mg phase is necessary to obtained Mg–Zn–Y alloy with superior mechanical properties at ambient-to-high temperatures.

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