Details
| Original language | English |
|---|---|
| Pages (from-to) | 810-823 |
| Number of pages | 14 |
| Journal | Journal of Biomedical Materials Research - Part A |
| Volume | 75 |
| Issue number | 4 |
| Publication status | Published - 15 Dec 2005 |
| Externally published | Yes |
Abstract
We examine the structure and properties of cold drawn Ti-50.1 at % Ni and Ti-50.9 at % Ni shape memory alloy wires. Wires with both compositions possess a strong 〈111〉 fiber texture in the wire drawing direction, a grain size on the order of micrometers, and a high dislocation density. The more Ni rich wires contain fine second phase precipitates, while the wires with lower Ni content are relatively free of precipitates. The wire stress-strain response depends strongly on composition through operant deformation mechanisms, and cannot be explained based solely on measured differences in the transformation temperatures. We provide fundamental connections between the material structure, deformation mechanisms, and resulting stress-strain responses. The results help clarify some inconsistencies and common misconceptions in the literature. Ramifications on materials selection and design for emerging biomedical applications of NiTi shape memory alloys are discussed.
Keywords
- Deformation, NiTi, Processing, Properties, Structure, Wires
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Materials Science(all)
- Biomaterials
- Engineering(all)
- Biomedical Engineering
- Materials Science(all)
- Metals and Alloys
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In: Journal of Biomedical Materials Research - Part A, Vol. 75, No. 4, 15.12.2005, p. 810-823.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Tensile deformation of NiTi wires
AU - Gall, Ken
AU - Tyber, Jeff
AU - Brice, Valerie
AU - Frick, Carl P.
AU - Maier, Hans J.
AU - Morgan, Neil
PY - 2005/12/15
Y1 - 2005/12/15
N2 - We examine the structure and properties of cold drawn Ti-50.1 at % Ni and Ti-50.9 at % Ni shape memory alloy wires. Wires with both compositions possess a strong 〈111〉 fiber texture in the wire drawing direction, a grain size on the order of micrometers, and a high dislocation density. The more Ni rich wires contain fine second phase precipitates, while the wires with lower Ni content are relatively free of precipitates. The wire stress-strain response depends strongly on composition through operant deformation mechanisms, and cannot be explained based solely on measured differences in the transformation temperatures. We provide fundamental connections between the material structure, deformation mechanisms, and resulting stress-strain responses. The results help clarify some inconsistencies and common misconceptions in the literature. Ramifications on materials selection and design for emerging biomedical applications of NiTi shape memory alloys are discussed.
AB - We examine the structure and properties of cold drawn Ti-50.1 at % Ni and Ti-50.9 at % Ni shape memory alloy wires. Wires with both compositions possess a strong 〈111〉 fiber texture in the wire drawing direction, a grain size on the order of micrometers, and a high dislocation density. The more Ni rich wires contain fine second phase precipitates, while the wires with lower Ni content are relatively free of precipitates. The wire stress-strain response depends strongly on composition through operant deformation mechanisms, and cannot be explained based solely on measured differences in the transformation temperatures. We provide fundamental connections between the material structure, deformation mechanisms, and resulting stress-strain responses. The results help clarify some inconsistencies and common misconceptions in the literature. Ramifications on materials selection and design for emerging biomedical applications of NiTi shape memory alloys are discussed.
KW - Deformation
KW - NiTi
KW - Processing
KW - Properties
KW - Structure
KW - Wires
UR - http://www.scopus.com/inward/record.url?scp=28844440776&partnerID=8YFLogxK
U2 - 10.1002/jbm.a.30464
DO - 10.1002/jbm.a.30464
M3 - Article
C2 - 16138359
AN - SCOPUS:28844440776
VL - 75
SP - 810
EP - 823
JO - Journal of Biomedical Materials Research - Part A
JF - Journal of Biomedical Materials Research - Part A
SN - 0021-9304
IS - 4
ER -