2026-09-19T12:56:24Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/1125002022-01-13T07:55:22Zcom_1721.1_7582com_1721.1_7581col_1721.1_131024
Samuel M. Allen.
Disko, Jeffry
Massachusetts Institute of Technology. Department of Materials Science and Engineering.
Massachusetts Institute of Technology. Department of Materials Science and Engineering
2017-12-05T19:15:36Z
2017-12-05T19:15:36Z
2010
2010
http://hdl.handle.net/1721.1/112500
1011525106
Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2010.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 47-48).
There is a broad range of life-saving medical implants and devices that rely on the shape-memory (SME) and superelastic properties of various nickel-based alloys [8]. Unfortunately, there is also serious concern about the toxicity of nickel. Titanium based shape-memory alloys have been noted as potentially non-toxic replacements of the more traditional, nickel-based shape memory alloys. In this thesis I present research concerning the potential of SME-capable titanium-tantalum alloys to replace Ni-based alloys in medical implants. A method for heat treatment of Ti -Ta alloys of varying compositions to induce formation of martensite was developed. Heat-treated alloys were then tested for SME and superelastic behavior by means of hot oil recovery tests and were characterized through optical microscopy. Metallographs of some of the samples were taken throughout the processing and testing procedures in order to directly observe changes in microstructure..
by Jeffry Disko.
S.B.
48 pages
eng
Massachusetts Institute of Technology
MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission.
http://dspace.mit.edu/handle/1721.1/7582
Materials Science and Engineering.
In search of martensite : titanium-tantalum shape-memory alloy
Thesis
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<Abstract>There is a broad range of life-saving medical implants and devices that rely on the shape-memory (SME) and superelastic properties of various nickel-based alloys [8]. Unfortunately, there is also serious concern about the toxicity of nickel. Titanium based shape-memory alloys have been noted as potentially non-toxic replacements of the more traditional, nickel-based shape memory alloys. In this thesis I present research concerning the potential of SME-capable titanium-tantalum alloys to replace Ni-based alloys in medical implants. A method for heat treatment of Ti -Ta alloys of varying compositions to induce formation of martensite was developed. Heat-treated alloys were then tested for SME and superelastic behavior by means of hot oil recovery tests and were characterized through optical microscopy. Metallographs of some of the samples were taken throughout the processing and testing procedures in order to directly observe changes in microstructure..</Abstract>
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