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

Xiaofei Fu; Chao Liu; Xili Lu; Xianli Li; Jingwei Lv; Famei Wang; Liying Wang

doi:10.1155/2017/4630156

Nanoscale Mechanical Properties of Nanoindented Ni_48.8Mn_27.2Ga₂₄ Ferromagnetic Shape Memory Thin Film

Scanning. 2017 May 28:2017:4630156. doi: 10.1155/2017/4630156. eCollection 2017.

Authors

Xiaofei Fu¹, Chao Liu^{1

2}, Xili Lu³, Xianli Li², Jingwei Lv², Famei Wang², Liying Wang²

Affiliations

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

Abstract

The structure and nanoscale mechanical properties of Ni_48.8Mn_27.2Ga₂₄ 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.