Branching of {110) twin boundaries in five-layered Ni-Mn-Ga bent single crystals

0520945 - FZÚ 2020 RIV GB eng J - Journal Article
Chulist, R. - Straka, Ladislav - Seiner, Hanuš - Sozinov, A. - Schell, N. - Tokarski, T.
Branching of {110) twin boundaries in five-layered Ni-Mn-Ga bent single crystals.
Materials and Design. Roč. 171, Jun (2019), s. 1-8, č. článku 107703. ISSN 0264-1275. E-ISSN 1873-4197
R&D Projects: GA ČR(CZ) GA17-00062S
EU Projects: European Commission(XE) 701867 - FUNMAH
Institutional support: RVO:68378271 ; RVO:61388998
Keywords : NiMnGa * bending * twinning * interfacial misfit * continuum mechanics
OECD category: Condensed matter physics (including formerly solid state physics, supercond.); Condensed matter physics (including formerly solid state physics, supercond.) (UT-L)
Impact factor: 6.289, year: 2019
Method of publishing: Open access

Two bending tests around two perpendicular axes were applied to 10M Ni-Mn-Ga single crystals with five-layered modulated structure. The crystal structure and microstructure evolution were examined using synchrotron radiation and electron backscatter diffraction, respectively. The bend stress results in pseudoelasto-plastic strain due to {101) twins tapering. A close examination of the microstructure reveals an additional pattern indicating microstructural changes in the form of {110) twins. The paper underlines the differences in mechanism for bending around two perpendicular axes explaining the amount of strain observed under pseudoelastic deformation. Additionally, the results are discussed with respect to minimization of elastic energyduetotwin refinement and branchingaswell as mobility of the {101) and {110) twin boundaries
Permanent Link: http://hdl.handle.net/11104/0305619