Acta Materialia

, volume 91 , pages 318-329

Austenite grain refinement during load-biased thermal cycling of a Ni49.9Ti50.1 shape memory alloy

M. L. Bowers ¹

Yipeng Gao ¹

L. Yang ¹

D J Gaydosh ²

Marc De Graef ³

R. D. Noebe ²

YUNZHI WANG ¹

Michael Mills ¹

Hide authors affiliations Show authors affiliations: 3 affiliations

Dept. of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, United States |

NASA Glenn Research Center, Materials and Structures Division, Cleveland, OH 44135, United States |

Department of Materials Science and Engineering, Carnegie Mellon University, Pittsburgh, PA 152213, United States |

Publication type: Journal Article

Publication date: 2015-06-01

Elsevier

Acta Materialia

scimago Q1

wos Q1

SJR: 2.972

CiteScore: 15.4

Impact factor: 9.3

ISSN: 13596454, 18732453

DOI: 10.1016/j.actamat.2015.03.017

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Metals and Alloys

Ceramics and Composites

Electronic, Optical and Magnetic Materials

Polymers and Plastics

Abstract

A near-equiatomic NiTi shape memory alloy was subjected to a variety of thermomechanical treatments including pure thermal cycling and load-biased thermal cycling to investigate microstructural evolution of the material under actuating conditions. In situ and post mortem scanning transmission electron microscopy (STEM) was used to study the effects of stress on the development of defect substructures during cycling through the martensitic transformation. High temperature observations of the austenite phase show rapid accumulation of dislocations and moderate deformation twinning upon thermomechanical cycling. Additionally, TEM-based orientation mapping suggests the emergence of fine crystallites from the original coarse austenite grain structure. A possible mechanism is proposed for the observed grain refinement based on the crystallographic theory of martensite transformation.

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Bowers M. et al. Austenite grain refinement during load-biased thermal cycling of a Ni49.9Ti50.1 shape memory alloy // Acta Materialia. 2015. Vol. 91. pp. 318-329.

GOST all authors (up to 50) Copy

Bowers M., Gao Y., Yang L., Gaydosh D. J., De Graef M., Noebe R. D., WANG Y., Mills M. Austenite grain refinement during load-biased thermal cycling of a Ni49.9Ti50.1 shape memory alloy // Acta Materialia. 2015. Vol. 91. pp. 318-329.

RIS |

Cite this

RIS Copy

TY - JOUR

DO - 10.1016/j.actamat.2015.03.017

UR - https://doi.org/10.1016/j.actamat.2015.03.017

TI - Austenite grain refinement during load-biased thermal cycling of a Ni49.9Ti50.1 shape memory alloy

T2 - Acta Materialia

AU - Bowers, M. L.

AU - Gao, Yipeng

AU - Yang, L.

AU - Gaydosh, D J

AU - De Graef, Marc

AU - Noebe, R. D.

AU - WANG, YUNZHI

AU - Mills, Michael

PY - 2015

DA - 2015/06/01

PB - Elsevier

SP - 318-329

VL - 91

SN - 1359-6454

SN - 1873-2453

ER -

BibTex

Cite this

BibTex (up to 50 authors) Copy

@article{2015_Bowers,

author = {M. L. Bowers and Yipeng Gao and L. Yang and D J Gaydosh and Marc De Graef and R. D. Noebe and YUNZHI WANG and Michael Mills},

title = {Austenite grain refinement during load-biased thermal cycling of a Ni49.9Ti50.1 shape memory alloy},

journal = {Acta Materialia},

year = {2015},

volume = {91},

publisher = {Elsevier},

month = {jun},

url = {https://doi.org/10.1016/j.actamat.2015.03.017},

pages = {318--329},

doi = {10.1016/j.actamat.2015.03.017}

}

Publisher

Elsevier

Journal

Acta Materialia

scimago Q1

wos Q1

SJR

2.972

CiteScore

15.4

Impact factor

9.3

ISSN

13596454 (Print)

18732453