Determination of the orientation relationship between austenite and incommensurate 7M modulated martensite in Ni–Mn–Ga alloys

Li, Z.B.; Zhang, Y.D.; Esling, Claude; Zhao, Xiang; Zuo, Liang

doi:10.1016/j.actamat.2011.01.015

Cited by 63 publications

(44 citation statements)

References 29 publications

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“…For the austenite to 7M martensite transformation, the Pitsch orientation relationship revealed in bulk Ni-MnGa [17], i.e. (1 0 1) A [1 0 1] A //(1 2 1) Mono [ 1 1 1] Mono , has been confirmed in the present work, as illustrated in Fig.…”

Section: Discussionsupporting

confidence: 80%

“…For the three types of twins, the complete twinning elements -K 1 , K 2 , g 1 , g 2 , P and s -were derived from the misorientation data using a general method [29,30], as shown in Table 1. It is found that the twinning modes are exactly the same as those in bulk NiMn-Ga alloys [17,30]. Here, we try to correlate the present twin relationships (identified by EBSD) under the monoclinic crystal system with the published ones (deduced from XRD) under the pseudo-orthorhombic crystal system.…”

Section: Crystallographic Orientations and Orientation Relationshipsmentioning

confidence: 74%

“…Generally speaking, the epitaxial growth of Ni-Mn-Ga thin films on monocrystal substrate may produce quite different microstructures, compared to those of polycrystalline bulk ingots [16][17][18][19]. Efforts have been constantly directed to reveal the microstructural features and crystallographic correlations of martensite variants in epitaxial Ni-Mn-Ga films [4,7,8,[20][21][22].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Insight into variant selection of seven-layer modulated martensite in Ni–Mn–Ga thin films grown on MgO(0 0 1) substrate

Yang

Zhang

et al. 2015

Acta Materialia

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Section: Discussionsupporting

confidence: 80%

Section: Crystallographic Orientations and Orientation Relationshipsmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Insight into variant selection of seven-layer modulated martensite in Ni–Mn–Ga thin films grown on MgO(0 0 1) substrate

Yang

Zhang

et al. 2015

Acta Materialia

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“…There exists a large amount of stacking faults inside the martensite plates, which is similar to the modulated martensite in NiMn-based alloys [23][24][25]. Locally, four types of martensite variants (represented as A, B, C and D in Figure 4a) are distributed alternately, which is in agreement with the 7M marteniste with monoclinic structure in Ni-Mn-Ga alloys [25,26].…”

Section: Crystal Structuresupporting

confidence: 66%

Microstructural Feature and Magnetocaloric Effect of Mn50Ni40.5In9.5 Melt-Spun Ribbons

Yang

et al. 2017

Crystals

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Abstract:The microstructure and magnetocaloric properties of the melt-spun and annealed Mn 50 Ni 40.5 In 9.5 ribbons were studied. It is shown that the post-annealing results in a considerable increase of the grain size for the initial austenite, where the columnar-shaped austenite grains almost run through the whole ribbon. Both the melt-spun and annealed ribbons consist of the mixture of austenite and martensite at room temperature, where a 8-layered modulated (8M) martensite structure was identified through selected area electron diffraction (SAED). Further High-angle Annular Dark-field (HAADF) characterizations reveal that the modulation period of 8M martensite is not homogeneous in one martensite plate. Due to strong magneto-structural coupling, the inverse martensitic transformation from a weak magnetic martensite to a strong magnetic austenite can be induced by the magnetic field, resulting in the inverse magnetocaloric effect around room temperature. For a field change of 5 T, the magnetic entropy change ∆S M of 3.7 J·kg −1 ·K −1 and 6.1 J·kg −1 ·K −1 , and the effective refrigerant capacity RC eff of 52.91 J·kg −1 and 99.08 J·kg −1 were obtained for melt-spun and annealed ribbons, respectively. The improvement of the magnetocaloric properties after annealing should be attributed to the enhanced atomic ordering and magnetization difference between two phases, as well as the reduced hysteresis loss. In addition, both the melt-spun and annealed ribbons can work at a relatively wide temperature range, i.e., δT FWHM = 34 K for melt-spun ribbons and δT FWHM = 28 K for annealed ribbons.

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“…The crystallographic relationship of magnetite lamellae and host ilmenite can be determined if we can find a plane and an in-plane direction parallelism between the lattices of the two phases (Li et al 2011). Eight ilmenite grains with magnetite lamellae of different size exhibit identical crystallographic relationships ( Supplementary Fig.…”

Section: Crystallographic Relationshipsmentioning

confidence: 99%

Magnetite exsolution in ilmenite from the Fe-Ti oxide gabbro in the Xinjie intrusion (SW China) and sources of unusually strong remnant magnetization

Tan

Wang

et al. 2016

American Mineralogist

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show abstract

Determination of the orientation relationship between austenite and incommensurate 7M modulated martensite in Ni–Mn–Ga alloys

Cited by 63 publications

References 29 publications

Insight into variant selection of seven-layer modulated martensite in Ni–Mn–Ga thin films grown on MgO(0 0 1) substrate

Insight into variant selection of seven-layer modulated martensite in Ni–Mn–Ga thin films grown on MgO(0 0 1) substrate

Microstructural Feature and Magnetocaloric Effect of Mn50Ni40.5In9.5 Melt-Spun Ribbons

Magnetite exsolution in ilmenite from the Fe-Ti oxide gabbro in the Xinjie intrusion (SW China) and sources of unusually strong remnant magnetization

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