An investigation of resolved shear stress on activation of slip systems during ultraprecision rotary cutting of local anisotropic Ti-6Al-4V alloy: Models and experiments

Zejia Zhao, Suet To (Corresponding Author)

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)

Abstract

Ti-6Al-4V alloy with local anisotropic characteristics is produced by electropulsing treatment (EPT) and used in ultraprecision rotary diamond cutting to explore the deformation mechanism of the alloy. Two different orientations of lamellar martensite α give rise to the local anisotropic behaviour. Critical resolved shear stress (CRSS) is introduced in this paper to investigate the slip modes of the hexagonal closest packing martensite. A geometrical and physical model is also proposed for calculation of resolved shear stresses on various slipping systems. The results show that glide occurs in some certain directions on the condition that resolved shear stress equals or exceeds the CRSS. The cutting force varies with martensitic orientations, which is supposedly due to the combined effects of lamellar α phase sizes and the coordination or competition of diverse slipping directions.

Original languageEnglish
Pages (from-to)69-78
Number of pages10
JournalInternational Journal of Machine Tools and Manufacture
Volume134
DOIs
Publication statusPublished - Nov 2018

Keywords

  • Anisotropic behaviour
  • CRSS
  • Lamellar martensite
  • Ti-6Al-4V alloy
  • Ultraprecision rotary diamond cutting

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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