2026-09-19T17:13:10Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/964532022-01-13T07:55:22Zcom_1721.1_7582com_1721.1_7581col_1721.1_131024
Christopher A. Schuh.
Gager, Mac (Brian McClure, Jr.)
Massachusetts Institute of Technology. Department of Materials Science and Engineering.
Massachusetts Institute of Technology. Department of Materials Science and Engineering
2015-04-08T18:01:54Z
2015-04-08T18:01:54Z
2014
2014
http://hdl.handle.net/1721.1/96453
905969495
Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2014.
Cataloged from PDF version of thesis.
Includes bibliographical references (page 33).
Shape memory alloys are a distinctive type of material that exhibits the fascinating properties of the shape memory effect and superelasticity. Shape memory properties are characterized by the diffusionless phase transformation between austenite and martensite that can be thermally or stress induced. Cu-based shape memory alloys provide an exciting area of research due to lower costs and higher working temperatures compared to Ni-Ti alloys prevalent in industry today. This work investigates the shape memory properties of oligocrystalline Cu-Al-Ni and Cu- Al-Mn-Ni microwires produced using a melt spinner. The melt spinner yielded continuous wires in quantities useful for the creation of complex structures. The composition of the wires is observed to change throughout processing of alloys and wires. Electropolishing rates were determined for improving surface texture and size constraint.
by Mac Gager.
S.B.
33 pages
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.
http://dspace.mit.edu/handle/1721.1/7582
Materials Science and Engineering.
Cu-based shape memory microwires : towards complex structures
Thesis
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<Abstract>Shape memory alloys are a distinctive type of material that exhibits the fascinating properties of the shape memory effect and superelasticity. Shape memory properties are characterized by the diffusionless phase transformation between austenite and martensite that can be thermally or stress induced. Cu-based shape memory alloys provide an exciting area of research due to lower costs and higher working temperatures compared to Ni-Ti alloys prevalent in industry today. This work investigates the shape memory properties of oligocrystalline Cu-Al-Ni and Cu- Al-Mn-Ni microwires produced using a melt spinner. The melt spinner yielded continuous wires in quantities useful for the creation of complex structures. The composition of the wires is observed to change throughout processing of alloys and wires. Electropolishing rates were determined for improving surface texture and size constraint.</Abstract>
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