Effect of shot-peening on the corrosion resistance of a Zr-based bulk metallic glass

Received 18 November 2009; received in revised form 4 January 2010; accepted 6 January 2010. published online 11 January 2010.

Surfaces of bulk glassy Zr59Ti3Cu20Al10Ni8 samples were shot-peened for different times and their corrosion behaviour was tested in 0.01M Na2SO4+xM NaCl (x=0; 0.01; 0.1) and 6M HCl. Slight improvement of spontaneous passivity but a decrease of pitting resistance are detected with prolonged shot-peening duration. The corrosion damage evolution is governed by the nature of the mechanically generated defects and their surrounding stress fields.

Keywords: Amorphous alloy, Bulk metallic glass, Corrosion, Surface modification, Shot-peening

a Leibniz-Institute for Solid State and Materials Research IFW Dresden, PO Box 270116, D-01171 Dresden, Germany

b Department of Materials Science & Metallurgy, University of Cambridge, Pembroke Street, CB2 3QZ Cambridge, United Kingdom

c Dresden University of Technology, Institute for Materials Science, D-01062 Dresden, Germany

Corresponding author. Tel.: +49 351 4659 275; fax: +49 351 4659 541.

PII: S1359-6462(10)00005-9

doi:10.1016/j.scriptamat.2010.01.004

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