Incommensurateness in nanotwinning models of modulated martensites

被引：11

作者：

Benesova, Barbora ^{[1
]}

Frost, Miroslav ^{[2
]}

Kampschulte, Malte ^{[3
]}

Melcher, Christof ^{[3
]}

Sedlak, Petr ^{[2
]}

Seiner, Hanus ^{[2
]}

机构：

[1] Univ Wurzburg, Dept Math, D-97074 Wurzburg, Germany

[2] Acad Sci Czech Republic, Inst Thermomech, Prague 18200 8, Czech Republic

[3] Rhein Westfal TH Aachen, Dept Math 1, D-52056 Aachen, Germany

来源：

PHYSICAL REVIEW B | 2015年 / 92卷 / 18期

关键词：

MN-GA ALLOYS; SHAPE-MEMORY ALLOYS; CRYSTAL-STRUCTURE; STOICHIOMETRIC NI2MNGA; ELECTRONIC-STRUCTURE; ADAPTIVE MARTENSITE; PHASE; TRANSFORMATION; SUPERSTRUCTURE; TRANSITIONS;

D O I：

10.1103/PhysRevB.92.180101

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the formation of modulated martensites in ferromagnetic shape memory alloys by a mathematical model originating from the nanotwinning concept. The results show that the incommensurateness, systematically observed in experiments for the modulated phases, may be understood as a precursor effect of the intermartensitic transitions, and its appearance does not contradict the nanotwinning concept itself. The model sufficiently explains the different levels of incommensurateness reported from different experimental observations for the 14-layered and 10-layered martensites of the Ni-Mn-Ga alloy and outlines the mechanism of formation of faults in the stacking sequences of these materials.

引用

页数：5

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