Surface integrity in dry and cryogenic machining of AZ31B Mg alloy with varying cutting edge radius tools

Z. Pu, J. C. Outeiro, A. C. Batista, O. W. Dillon, D. A. Puleo, I. S. Jawahir

Research output: Contribution to journalConference articlepeer-review

37 Scopus citations

Abstract

Surface integrity of machined products has a critical impact on their functional performance. Magnesium alloys are lightweight materials for transportation industry and are also emerging as a potential material for temporary biomedical implants. However, their unsatisfactory corrosion resistance limits their application to a great extent. Surface integrity factors, such as grain size, crystallographic orientation and residual stresses, were reported to have significant influence on corrosion resistance of AZ31 Mg alloys. In this study, AZ31B Mg discs were orthogonally turned using cutting tools with two edge radii under both dry and cryogenic conditions. The influence of cutting edge radius and cooling method on surface integrity was investigated. Cryogenic machining using a large edge radius tool led to a thicker grain refinement layer, larger compressive residual stresses and stronger intensity of basal texture, which may remarkably enhance the corrosion performance of magnesium alloys.

Original languageEnglish
Pages (from-to)282-287
Number of pages6
JournalProcedia Engineering
Volume19
DOIs
StatePublished - 2011
Event1st CIRP Conference on Surface Integrity, CSI 2012 - Bremen, Germany
Duration: Jan 30 2012Feb 1 2012

Keywords

  • Cryogenic cooling
  • Crystallographic orientation
  • Magnesium
  • Surface integrity

ASJC Scopus subject areas

  • Engineering (all)

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