The effects of machining on the microstructure and transformation behavior of NiTi Alloy

Y. Kaynak, H. Tobe, R. D. Noebe, H. E. Karaca, I. S. Jawahir

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

This study presents evidence of a machining-induced deformation layer in a NiTi shape memory alloy and the subsequent effect of this layer on the underlying transformation behavior of the material. Severe twinning-induced deformation was observed in the substrate of samples pre-cooled and machined by orthogonal cutting under cryogenic conditions, while (1 1 4)B2-type deformation twinning and significant dislocation activity was observed after dry machining of the NiTi. In addition, cryogenic machining resulted in a much deeper affected zone than machining under dry conditions.

Original languageEnglish
Pages (from-to)60-63
Number of pages4
JournalScripta Materialia
Volume74
DOIs
StatePublished - Mar 2014

Bibliographical note

Funding Information:
Support from the NASA EPSCOR Program under Grant no. NNX11AQ31A and the NASA FAP Aeronautical Sciences Project are greatly acknowledged.

Keywords

  • Cryogenic machining
  • Machining-induced layer
  • NiTi
  • Shape memory alloys
  • Twinning deformation

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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