Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
614396 | Tribology International | 2015 | 5 Pages |
•The Delta-L and scratch width can be correlated with the scratch performance.•A material with poor scratch resistance exhibits a larger periodic stick-slip distance than that with better resistance.•The periodic stick-slip distance could be used as an evaluation parameter of scratch resistance.
For the scratch process of polypropylene (PP), the stick-slip phenomenon always exists and contributes to the observed periodic surface damage patterns. The stick-slip, one main cause for scratch visibility, alters the surface characteristics of substrate and eventually induces scratch visibility. Both ASTM/ISO and Erichsen scratch test methods are employed to study the stick-slip phenomenon and its effects on scratch behavior of PP. Image analysis shows that the stick-slip phenomenon was responsible for material removal and severe surface damage. Possible solutions to improve the scratch performance of polymeric materials are also discussed in this paper.