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Ultra-high molecular weight polyethylene has been micro-scratched with 90° cube corner tips. The scratch mode was flat-on, uni-directional and single pass. The micro-scratches and cross-sectional scratch profiles were characterised with atomic force microscopy. No detached debris is produced. Cross-sectional scratch profiles have been analysed using Zum Gahr's formalism giving an fab ratio slightly above zero. This is consistent with expectation for ductile polymers where none or littledoi:10.4028/www.scientific.net/msf.654-656.2455 fatcat:lwmoipo66rcatmaffodwahfozi