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Volume 2017, Article ID 4630156, 5 pages
https://doi.org/10.1155/2017/4630156
Research Article

Nanoscale Mechanical Properties of Nanoindented Ni48.8Mn27.2Ga24 Ferromagnetic Shape Memory Thin Film

1The State Key Laboratory Base of Unconventional Oil and Gas Accumulation and Exploitation, College of Earth Science, Northeast Petroleum University, Daqing 163318, China
2School of Electronics Science, Northeast Petroleum University, Daqing 163318, China
3Institute of Materials Processing and Intelligent Manufacturing & Center for Biomedical Materials and Engineering, Harbin Engineering University, Harbin 150001, China

Correspondence should be addressed to Chao Liu; moc.621@uil-msm and Xili Lu; moc.621@5791issisul

Received 31 March 2017; Accepted 10 May 2017; Published 28 May 2017

Academic Editor: Nicolas Delorme

Copyright © 2017 Xiaofei Fu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The structure and nanoscale mechanical properties of Ni48.8Mn27.2Ga24 thin film fabricated by DC magnetron sputtering are investigated systematically. The thin film has the austenite state at room temperature with the L21 Hesuler structure. During nanoindentation, stress-induced martensitic transformation occurs on the nanoscale for the film annealed at 823 K for 1 hour and the shape recovery ratio is up to 85.3%. The associated mechanism is discussed.