Modeling and simulation of machining-induced surface integrity characteristics of NiTi alloy

Y. Kaynak, S. Manchiraju, I. S. Jawahir

Research output: Contribution to journalConference articlepeer-review

11 Scopus citations

Abstract

NiTi shape memory alloys have gained increased interest in various industries, including biomedical and aerospace applications due to their unique properties such as shape memory effect and superelasticity. Martensitic phase transformation in NiTi significantly affects the surface integrity characteristics. This phase transformation needs to be better understood to control and enhance the shape memory and microstructural properties of NiTi shape memory alloys. This study presents results of combined experimentation and simulation of cutting-induced phase transformation in orthogonal machining of NiTi shape memory alloys. A phenomenological modeling approach was utilized to model machining-induced phase transformation. NiTi shape memory alloys alloy were in austenite phases at room temperature. The transformation during dry machining process from austenite to martensite phases, and the resulting volume fraction was successfully simulated using DEFORM 2-D software by implementing a user-defined subroutine. The developed model is capable of capturing the trend of variations in volume fracture and the depth of transformed layer as a function of cutting speed.

Original languageEnglish
Pages (from-to)557-562
Number of pages6
JournalProcedia CIRP
Volume31
DOIs
StatePublished - 2015
Event15th CIRP Conference on Modelling of Machining Operations, CMMO 2015 - Karlsruhe, Germany
Duration: Jun 11 2015Jun 12 2015

Bibliographical note

Funding Information:
Support from the NASA EPSCOR Program under Grant no. NNX11AQ31A is acknowledged. Dr. Yusuf Kaynak also acknowledges the support from Scientific Research Project Program at Marmara University (Istanbul, Turkey).

Publisher Copyright:
© 2015 The Authors. Published by Elsevier B.V.

Keywords

  • Finite element method
  • Machining
  • NiTi alloy
  • Phase transformation
  • Surface integrity

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Industrial and Manufacturing Engineering

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