Magneto-Mechanics of Magnetic Shape-Memory Crystals With Micropeened Surfaces

Authors

Zane Harbison¹ , Gianella Condor² , Ammon Butler² , John Martin² , Shane Palmer² , Paul Lindquist² , Peter Mullner²

1. Columbia University
2. Boise State University

Conference / event

Idaho Conference of Undergraduate Research, July 2022 (Virtual)

Poster summary

Nickel-Manganese-Gallium is a prominent MSM crystal that can be strained to 6% of its length. The alloy degrades and breaks after repeated loading, a behavior called fatigue. Bombarding the surface of the material with minuscule glass beads (micropeening) increases the number of loading cycles thousandfold; however, this decreases the maximum strain. In this project, stress and strain were measured before and after micropeening at different pressures to identify a quantitative relationship between process parameters and the dynamic material properties. Preliminary results show that micropeening at 25 psi preserves a large part of the strain while micropeening at 30 psi suppresses most of the strain.

Keywords

MSM material, Nickel-Maganese-Gallium, Micropeening, Fatigue life, Stress, Strain

Research areas

Material Sciences

References

1. S. Fähler, Tutorial G, MRS Fall Symposium 2009, Boston, MA, November 29, 2009.

Funding

1. National Science Foundation (No. XC-1950305 and NSF-DMR 1710640)

Supplemental files

1. Video supplementing the poster content.   Download

Additional information

Competing interests

None declared.

Data availability statement

The datasets generated during and/or analyzed during the current study are available from the corresponding_author author on reasonable request.

Creative Commons license

Copyright © 2022 Harbison et al. This is an open access work distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.