In search of martensite : titanium-tantalum shape-memory alloy
Name
1011525106-MIT.pdf
Description
Full printable version
Size
4.81 MB
Format
Adobe PDF
Checksum (MD5)
e97a122f44824b755081afeb6103d1ca
Author(s)
Disko, Jeffry
Advisor(s)
Samuel M. Allen.
Date Issued
2010
Publisher
Massachusetts Institute of Technology
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..
Description
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).
Subjects
Materials Science and Engineering.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
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