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

*Corresponding author for this work

    Research output: Contribution to journalConference articlepeer-review

    46 Citations (Scopus)
    24 Downloads

    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
    Publication statusPublished - 2011
    Event1st CIRP Conference on Surface Integrity, CSI 2012 - Bremen, Germany
    Duration: 30 Jan 20121 Feb 2012

    Keywords

    • Cryogenic cooling
    • Crystallographic orientation
    • Magnesium
    • Surface integrity

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