Martensitic transformation, ductility, and shape-memory effect of polycrystalline Ni56Mn25-x-FexGa19 alloys

Yunqing Ma, Lihong Xu, Van Li, Chengbao Jiang, Huibin Xu, Young Kook Lee

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Buttons of high-temperature shape-memory alloy Ni56Mn 25-xFexGa19 were prepared by arc melting under argon atmosphere. The specimens were hot rolled to 1 mm plates, and their martensitic transformation behaviors, ductilities, and shape-memory effects were investigated through differential scanning calorimetry and bending tests. It was found that the brittleness of polycrystalline Ni2MnGa was ameliorated through introduction of a ductile phase by Fe addition. Ni 56Mn17Fe8Ga19 alloy shows great potential as a practical high-temperature shape-memory alloy with martensitc transformation start temperature above 200°C. It can bear strain of 6% before fracture in bending tests and shows a maximum reversible strain of 3.5%.

Original languageEnglish
Pages (from-to)843-847
Number of pages5
JournalZeitschrift fuer Metallkunde/Materials Research and Advanced Techniques
Issue number8
Publication statusPublished - 2005 Aug

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry


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