Crystal structure and macrotwin interface of five-layered martensite in Ni-Mn-Ga magnetic shape memory alloy

Y. Ge; Hua Jiang; A. Sozinov; O. Söderberg; N. Lanska; J. Keränen; Esko I. Kauppinen; V.K. Lindroos; Simo-Pekka Hannula

doi:10.1016/j.msea.2005.12.057

Crystal structure and macrotwin interface of five-layered martensite in Ni-Mn-Ga magnetic shape memory alloy

Y. Ge (Corresponding Author), Hua Jiang, A. Sozinov, O. Söderberg, N. Lanska, J. Keränen, Esko I. Kauppinen, V.K. Lindroos, Simo-Pekka Hannula

VTT Technical Research Centre of Finland

Helsinki University of Technology

Research output: Contribution to journal › Article › Scientific › peer-review

41 Citations (Scopus)

Abstract

The crystal structure of the five-layered (5M) martensite and the martensite to martensite interface in the alloys Ni_48.9Mn_30.8Ga_20.3 and Ni_49.5Mn_28.6Ga_21.9 (numbers indicate at.%) were investigated by the X-ray diffraction as well as by the conventional and by the high resolution transmission electron microscopy (HRTEM). The martensite to martensite interface arises from meeting of growth fronts of two microtwin sequences with the twin planes (1 1 0) and (1 1 0), respectively. The interface was found to consist of two different configurations, the crossing and the step type. The HRTEM images reveal that the martensitic structure is not a perfect five-layered structure, but there are also other periodic structures (seven-layered and ten-layered), together with aperiodic structure and the irregular plane faults.

Original language	English
Pages (from-to)	961-964
Journal	Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	438-440
Issue number	3
DOIs	https://doi.org/10.1016/j.msea.2005.12.057
Publication status	Published - 2006
MoE publication type	A1 Journal article-refereed

Keywords

Ni-Mn-Ga alloys
twinning
gallium
manganese
nickel
martensite
Ni-based alloys
nickel-based alloys
microtwin
HRTEM
X-ray diffraction

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10.1016/j.msea.2005.12.057

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Ge, Y., Jiang, H., Sozinov, A., Söderberg, O., Lanska, N., Keränen, J., Kauppinen, E. I., Lindroos, V. K., & Hannula, S.-P. (2006). Crystal structure and macrotwin interface of five-layered martensite in Ni-Mn-Ga magnetic shape memory alloy. Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 438-440(3), 961-964. https://doi.org/10.1016/j.msea.2005.12.057

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title = "Crystal structure and macrotwin interface of five-layered martensite in Ni-Mn-Ga magnetic shape memory alloy",

abstract = "The crystal structure of the five-layered (5M) martensite and the martensite to martensite interface in the alloys Ni48.9Mn30.8Ga20.3 and Ni49.5Mn28.6Ga21.9 (numbers indicate at.%) were investigated by the X-ray diffraction as well as by the conventional and by the high resolution transmission electron microscopy (HRTEM). The martensite to martensite interface arises from meeting of growth fronts of two microtwin sequences with the twin planes (1 1 0) and (1 1 0), respectively. The interface was found to consist of two different configurations, the crossing and the step type. The HRTEM images reveal that the martensitic structure is not a perfect five-layered structure, but there are also other periodic structures (seven-layered and ten-layered), together with aperiodic structure and the irregular plane faults.",

keywords = "Ni-Mn-Ga alloys, twinning, gallium, manganese, nickel, martensite, Ni-based alloys, nickel-based alloys, microtwin, HRTEM, X-ray diffraction",

author = "Y. Ge and Hua Jiang and A. Sozinov and O. S{\"o}derberg and N. Lanska and J. Ker{\"a}nen and Kauppinen, {Esko I.} and V.K. Lindroos and Simo-Pekka Hannula",

year = "2006",

doi = "10.1016/j.msea.2005.12.057",

language = "English",

volume = "438-440",

pages = "961--964",

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Ge, Y, Jiang, H, Sozinov, A, Söderberg, O, Lanska, N, Keränen, J, Kauppinen, EI, Lindroos, VK & Hannula, S-P 2006, 'Crystal structure and macrotwin interface of five-layered martensite in Ni-Mn-Ga magnetic shape memory alloy', Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, vol. 438-440, no. 3, pp. 961-964. https://doi.org/10.1016/j.msea.2005.12.057

Crystal structure and macrotwin interface of five-layered martensite in Ni-Mn-Ga magnetic shape memory alloy. / Ge, Y. (Corresponding Author); Jiang, Hua; Sozinov, A. et al.
In: Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 438-440, No. 3, 2006, p. 961-964.

Research output: Contribution to journal › Article › Scientific › peer-review

TY - JOUR

T1 - Crystal structure and macrotwin interface of five-layered martensite in Ni-Mn-Ga magnetic shape memory alloy

AU - Ge, Y.

AU - Jiang, Hua

AU - Sozinov, A.

AU - Söderberg, O.

AU - Lanska, N.

AU - Keränen, J.

AU - Kauppinen, Esko I.

AU - Lindroos, V.K.

AU - Hannula, Simo-Pekka

PY - 2006

Y1 - 2006

N2 - The crystal structure of the five-layered (5M) martensite and the martensite to martensite interface in the alloys Ni48.9Mn30.8Ga20.3 and Ni49.5Mn28.6Ga21.9 (numbers indicate at.%) were investigated by the X-ray diffraction as well as by the conventional and by the high resolution transmission electron microscopy (HRTEM). The martensite to martensite interface arises from meeting of growth fronts of two microtwin sequences with the twin planes (1 1 0) and (1 1 0), respectively. The interface was found to consist of two different configurations, the crossing and the step type. The HRTEM images reveal that the martensitic structure is not a perfect five-layered structure, but there are also other periodic structures (seven-layered and ten-layered), together with aperiodic structure and the irregular plane faults.

AB - The crystal structure of the five-layered (5M) martensite and the martensite to martensite interface in the alloys Ni48.9Mn30.8Ga20.3 and Ni49.5Mn28.6Ga21.9 (numbers indicate at.%) were investigated by the X-ray diffraction as well as by the conventional and by the high resolution transmission electron microscopy (HRTEM). The martensite to martensite interface arises from meeting of growth fronts of two microtwin sequences with the twin planes (1 1 0) and (1 1 0), respectively. The interface was found to consist of two different configurations, the crossing and the step type. The HRTEM images reveal that the martensitic structure is not a perfect five-layered structure, but there are also other periodic structures (seven-layered and ten-layered), together with aperiodic structure and the irregular plane faults.

KW - Ni-Mn-Ga alloys

KW - twinning

KW - gallium

KW - manganese

KW - nickel

KW - martensite

KW - Ni-based alloys

KW - nickel-based alloys

KW - microtwin

KW - HRTEM

KW - X-ray diffraction

U2 - 10.1016/j.msea.2005.12.057

DO - 10.1016/j.msea.2005.12.057

M3 - Article

SN - 0921-5093

VL - 438-440

SP - 961

EP - 964

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

IS - 3

ER -

Crystal structure and macrotwin interface of five-layered martensite in Ni-Mn-Ga magnetic shape memory alloy

Abstract

Keywords

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