High-cycle fatigue of 10M Ni-Mn-Ga magnetic shape memory alloy in reversed mechanical loading

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High-cycle fatigue of 10M Ni-Mn-Ga magnetic shape memory alloy in reversed mechanical loading. / Aaltio, I.; Soroka, A.; Ge, Y.; Söderberg, O.; Hannula, S. P.

julkaisussa: Smart Materials and Structures, Vuosikerta 19, Nro 7, 075014, 01.06.2010, s. 1-10.

Tutkimustuotos: Lehtiartikkeli

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Bibtex - Lataa

@article{707c21f9da03483eb720000b09521e46,
title = "High-cycle fatigue of 10M Ni-Mn-Ga magnetic shape memory alloy in reversed mechanical loading",
abstract = "Application of Ni-Mn-Ga magnetic shape memory alloys in magnetic-field-induced actuation relies on their performance in long-term high-cycle fatigue. In this paper the performance and changes in the microstructure of a Ni-Mn-Ga 10M martensite single crystal material are reported in a long-term mechanically induced shape change cycling. The longest test was run for 2 × 109 cycles at a frequency of 250Hz and a strain amplitude of 1{\%}. After the test a clear increase of the dynamic stiffness of the material was detected. Three specimens out of ten were cycled until fracture occurred and their fracture mechanism was studied. It was observed that the macroscopic crack growth took place roughly at a 45° angle with respect to the loading direction that was along the 〈100〉 crystallographic direction of the sample. The macroscopic fracture plane seemed to correspond roughly to the {111} crystal planes. On a microscopic scale the fracture propagated in a step-like manner at least partly along crystallographic planes. The steps at the fracture plane correspond to the {101} twin planes, with the height of steps along the 〈101〉 direction. The final fracture of the samples occurred in a brittle manner after the critical stress was exceeded.",
author = "I. Aaltio and A. Soroka and Y. Ge and O. S{\"o}derberg and Hannula, {S. P.}",
year = "2010",
month = "6",
day = "1",
doi = "10.1088/0964-1726/19/7/075014",
language = "English",
volume = "19",
pages = "1--10",
journal = "Smart Materials and Structures",
issn = "0964-1726",
publisher = "IOP Publishing",
number = "7",

}

RIS - Lataa

TY - JOUR

T1 - High-cycle fatigue of 10M Ni-Mn-Ga magnetic shape memory alloy in reversed mechanical loading

AU - Aaltio, I.

AU - Soroka, A.

AU - Ge, Y.

AU - Söderberg, O.

AU - Hannula, S. P.

PY - 2010/6/1

Y1 - 2010/6/1

N2 - Application of Ni-Mn-Ga magnetic shape memory alloys in magnetic-field-induced actuation relies on their performance in long-term high-cycle fatigue. In this paper the performance and changes in the microstructure of a Ni-Mn-Ga 10M martensite single crystal material are reported in a long-term mechanically induced shape change cycling. The longest test was run for 2 × 109 cycles at a frequency of 250Hz and a strain amplitude of 1%. After the test a clear increase of the dynamic stiffness of the material was detected. Three specimens out of ten were cycled until fracture occurred and their fracture mechanism was studied. It was observed that the macroscopic crack growth took place roughly at a 45° angle with respect to the loading direction that was along the 〈100〉 crystallographic direction of the sample. The macroscopic fracture plane seemed to correspond roughly to the {111} crystal planes. On a microscopic scale the fracture propagated in a step-like manner at least partly along crystallographic planes. The steps at the fracture plane correspond to the {101} twin planes, with the height of steps along the 〈101〉 direction. The final fracture of the samples occurred in a brittle manner after the critical stress was exceeded.

AB - Application of Ni-Mn-Ga magnetic shape memory alloys in magnetic-field-induced actuation relies on their performance in long-term high-cycle fatigue. In this paper the performance and changes in the microstructure of a Ni-Mn-Ga 10M martensite single crystal material are reported in a long-term mechanically induced shape change cycling. The longest test was run for 2 × 109 cycles at a frequency of 250Hz and a strain amplitude of 1%. After the test a clear increase of the dynamic stiffness of the material was detected. Three specimens out of ten were cycled until fracture occurred and their fracture mechanism was studied. It was observed that the macroscopic crack growth took place roughly at a 45° angle with respect to the loading direction that was along the 〈100〉 crystallographic direction of the sample. The macroscopic fracture plane seemed to correspond roughly to the {111} crystal planes. On a microscopic scale the fracture propagated in a step-like manner at least partly along crystallographic planes. The steps at the fracture plane correspond to the {101} twin planes, with the height of steps along the 〈101〉 direction. The final fracture of the samples occurred in a brittle manner after the critical stress was exceeded.

UR - http://www.scopus.com/inward/record.url?scp=77953739573&partnerID=8YFLogxK

U2 - 10.1088/0964-1726/19/7/075014

DO - 10.1088/0964-1726/19/7/075014

M3 - Article

VL - 19

SP - 1

EP - 10

JO - Smart Materials and Structures

JF - Smart Materials and Structures

SN - 0964-1726

IS - 7

M1 - 075014

ER -

ID: 4663710