TY - JOUR
T1 - Asperity level characterization of abrasive wear using atomic force microscopy
AU - Walker, Jack
AU - Umer, Jamal
AU - Mohammad-Pour, Mahdi
AU - Theodossiades, Stephanos
AU - Bewsher, Stephen R.
AU - Offner, Günter
AU - Bansal, Hemant
AU - Leighton, Michael
AU - Braunstingl, Michael
AU - Flesch, Heinz-Georg
PY - 2021/6/30
Y1 - 2021/6/30
N2 - Using an atomic force microscope, a nanoscale wear characterization method has been applied to a commercial steel substrate AISI 52100, a common bearing material. Two wear mechanisms were observed by the presented method: atom attrition and elastoplastic ploughing. It is shown that not only friction can be used to classify the difference between these two mechanisms, but also the ‘degree of wear’. Archard's Law of adhesion shows good conformity to experimental data at the nanoscale for the elastoplastic ploughing mechanism. However, there is a distinct discontinuity between the two identified mechanisms of wear and their relation to the load and the removed volume. The length-scale effect of the material's hardness property plays an integral role in the relationship between the ‘degree of wear’ and load. The transition between wear mechanisms is hardness-dependent, as below a load threshold limited plastic deformation in the form of pile up is exhibited. It is revealed that the presented method can be used as a rapid wear characterization technique, but additional work is necessary to project individual asperity interaction observations to macroscale contacts.
AB - Using an atomic force microscope, a nanoscale wear characterization method has been applied to a commercial steel substrate AISI 52100, a common bearing material. Two wear mechanisms were observed by the presented method: atom attrition and elastoplastic ploughing. It is shown that not only friction can be used to classify the difference between these two mechanisms, but also the ‘degree of wear’. Archard's Law of adhesion shows good conformity to experimental data at the nanoscale for the elastoplastic ploughing mechanism. However, there is a distinct discontinuity between the two identified mechanisms of wear and their relation to the load and the removed volume. The length-scale effect of the material's hardness property plays an integral role in the relationship between the ‘degree of wear’ and load. The transition between wear mechanisms is hardness-dependent, as below a load threshold limited plastic deformation in the form of pile up is exhibited. It is revealed that the presented method can be used as a rapid wear characterization technique, but additional work is necessary to project individual asperity interaction observations to macroscale contacts.
KW - abrasive
KW - atomic force microscope
KW - friction
KW - nanoscale
KW - wear
UR - http://www.scopus.com/inward/record.url?scp=85111092900&partnerID=8YFLogxK
U2 - 10.1098/rspa.2021.0103
DO - 10.1098/rspa.2021.0103
M3 - Article
SN - 1364-5021
VL - 477
JO - Proceedings of the Royal Society A
JF - Proceedings of the Royal Society A
IS - 2250
M1 - 20210103
ER -