Mechanics examination on the wear behaviour of shape memory alloys

Paper

Yan, Wenyi. 2005. "Mechanics examination on the wear behaviour of shape memory alloys." Xie, Mike, Mouritz, Adrian, Khatibi, Akbar Afaghi, Gardiner, Craig and Chiu, Wing Kong (ed.) 4th Australasian Congress on Applied Mechanics (ACAM 2005). Melbourne, Australia 16 - 18 Feb 2005 North Melbourne, Vic, Australia.
Paper/Presentation Title

Mechanics examination on the wear behaviour of shape memory alloys

Presentation TypePaper
Authors
AuthorYan, Wenyi
EditorsXie, Mike, Mouritz, Adrian, Khatibi, Akbar Afaghi, Gardiner, Craig and Chiu, Wing Kong
Journal or Proceedings TitleProceedings of the 4th Australasian Congress on Applied Mechanics: Advances in Applied Mechanics (ACAM 2005)
Journal Citation1, pp. 479-484
Number of Pages6
Year2005
Place of PublicationNorth Melbourne, Vic, Australia
ISBN1876855231
Web Address (URL) of Paperhttp://www.materialsaustralia.com.au/ACAM2005/
Conference/Event4th Australasian Congress on Applied Mechanics (ACAM 2005)
Event Details
4th Australasian Congress on Applied Mechanics (ACAM 2005)
Parent
Australasian Congress on Applied Mechanics
Delivery
In person
Event Date
16 to end of 18 Feb 2005
Event Location
Melbourne, Australia
Abstract

Shape memory alloys are well recognized functional and smart materials, which have been
exploited to develop intelligent structures and devices in many fields. Of particular importance is its exciting application in the field of biomechanical engineering. In addition, further potential applications of shape memory alloys are being investigated, such as shape memory alloys-based functional composites. Recent experimental research indicates that shape memory alloy nickeltitanium alloy (NiTi) is superior to stainless steel against wear and could be applied in tribological engineering. It is believed that the super wear resistance of shape memory alloys is mainly due to the recovery of the superelastic deformation. Our recent wear study indicates that wear rate is very
sensitive to the maximum contact pressure. In the present study, which involves applying Hertz contact theory and the finite element method, the wear behavior of shape memory alloys is investigated through analyzing the contact pressure. In contrast to the existing explanation of the major contribution of superelasticity, our investigation indicates that the superior wear resistance of shape memory alloys is directly linked to the low Young's modulus of the alloy, the low transformation stress and large transformation strain, which result in low maximum contact pressure and therefore low wear rate. Additionally, high plastic yield strength of transformed martensite NiTi also enhances its wear resistance.

Keywordsshape memory alloys (SMA), wear, nickel-titanium alloy (NiTi)
ANZSRC Field of Research 2020400303. Biomechanical engineering
401607. Metals and alloy materials
401405. Machine tools
Public Notes

Author retains copyright.

Byline AffiliationsDepartment of Mechanical and Mechatronic Engineering
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