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Open AccessArticle

Shape Change and Crystal Orientation of B19 Martensite in Equiatomic TiPd Alloy by Isobaric Test

1
Department of Materials Science and Engineering, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan
2
Division of Materials Science and Chemistry, Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan
3
National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0047, Japan
*
Author to whom correspondence should be addressed.
Metals 2020, 10(3), 375; https://doi.org/10.3390/met10030375
Received: 13 February 2020 / Revised: 9 March 2020 / Accepted: 12 March 2020 / Published: 14 March 2020
We investigated the texture and the shape change in the equiatomic TiPd alloy, and discussed the relationship between the shape change and the atomic movements associated with martensitic transformation. Thermomechanical analyzer tests indicate that the direction of the shape change was different between the 0° and 90° samples, cutting out parallel and perpendicular to the hearth side of button ingot, respectively. In the 0° sample, shrinking and expansion were observed during the reverse and forward martensitic transformations, respectively, whereas the opposite tendency was confirmed in the 90° sample compared to the 0° sample. During the isobaric test, the martensitic variants were oriented to a (010) plane with compressive loading, and the B2 parent phase crystals also became coarse. There is a close relationship between the shape change due to the crystal orientation by the isobaric test and the shear-shuffling direction due to martensitic transformation. View Full-Text
Keywords: shape memory ally; microstructure; electron back scattered diffraction pattern; EBSD shape memory ally; microstructure; electron back scattered diffraction pattern; EBSD
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MDPI and ACS Style

Hisada, S.; Matsuda, M.; Yamabe-Mitarai, Y. Shape Change and Crystal Orientation of B19 Martensite in Equiatomic TiPd Alloy by Isobaric Test. Metals 2020, 10, 375.

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