Fundamental and applied aspects of newly developed Cu-Al-Mn-based shape memory alloys

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Cu-base shape memory (SM) alloys are commercially attractive because of their low cost compared with Ti-Ni practical alloys, however, the conventional polycrystalline alloys, such as Cu-Al-Ni and Cu-Zn-Al alloys, with the B2, D03 or L21 ordered structure are too brittle to be sufficiently cold-worked. The present authors have developed ductile Cu-Al-Mn-base SM alloys by control of the degree of order in the β phase exhibiting A2/B2 and B2/L21 ordering transitions. Moreover, it was found that the SM properties can be enhanced by the application of microstructural control of grain size and texture, and a large superelastic strain of 7% was obtained by suitable thermomechanical treatments. This paper reviews the fundamental aspects of Cu-Al-Mn alloys in terms of the phase stability and the microstructural control for SM properties. The Invar effect and a new type of medical guidewires with functionally graded properties are also presented.

Original languageEnglish
Title of host publicationMaterials Science and Technology Conference and Exhibition, MS and T'07 - "Exploring Structure, Processing, and Applications Across Multiple Materials Systems"
Pages2117-2126
Number of pages10
Publication statusPublished - 2007 Dec 1
EventMaterials Science and Technology Conference and Exhibition, MS and T'07 - "Exploring Structure, Processing, and Applications Across Multiple Materials Systems" - Detroit, MI, United States
Duration: 2007 Sep 162007 Sep 20

Publication series

NameMaterials Science and Technology Conference and Exhibition, MS and T'07 - "Exploring Structure, Processing, and Applications Across Multiple Materials Systems"
Volume4

Other

OtherMaterials Science and Technology Conference and Exhibition, MS and T'07 - "Exploring Structure, Processing, and Applications Across Multiple Materials Systems"
Country/TerritoryUnited States
CityDetroit, MI
Period07/9/1607/9/20

Keywords

  • Guidewire
  • Martensitic transformation
  • Shape memory alloy
  • Superelasticity

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics

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