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Investigation on martensitic transformation behavior, microstructures and mechanical properties of Fe-doped Ni-Mn-In alloys

  • Harbin Institute of Technology

Research output: Contribution to journalArticlepeer-review

Abstract

Ni-Mn-In alloys are doped by Fe in order to improve the ductility of this intermetallic. The phase transformation behavior, microstructures and mechanical properties of Ni50Mn34In16 - yFey (y = 0, 2, 3, 4, 5, 8) alloys are investigated in this paper. The phase transformation temperatures increase with the increase of Fe content, and some second phase particles appear both along the grain boundaries and inside the grains after being doped 5 at.% and 8 at.% Fe. The compressive strength and maximum compressive strain reach up to 1200 MPa and 15.8% for amounts higher than 8 at.% Fe. In addition, the fracture type changes from typical intergranular crack to transgranular crack gradually with the increase of Fe content.

Original languageEnglish
Pages (from-to)174-178
Number of pages5
JournalMaterials Science and Engineering: A
Volume507
Issue number1-2
DOIs
StatePublished - 15 May 2009
Externally publishedYes

Keywords

  • Brittleness and ductility
  • Intermetallics
  • Microstructure
  • Phase transformation
  • Precipitates

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