Figure 8: SEM micrograph of aluminum alloy,
(a) formation of grooves due to ploughing,
(b) optical micrograph of the cross-section of wear track shows pore covering by deformed material,
(c) entrapments of wear debris inside a pore,
(d) crack initiation near a pore,
(e) crack propagation,
(f) cross section of the wear track illustrating delamination,
(g) cross section of the wear track showing the propagation of sub-surface crack due to the presence of porosity and
(h) Hertzian-type cracks developed due to surface tensile stress.
(a) formation of grooves due to ploughing,
(b) optical micrograph of the cross-section of wear track shows pore covering by deformed material,
(c) entrapments of wear debris inside a pore,
(d) crack initiation near a pore,
(e) crack propagation,
(f) cross section of the wear track illustrating delamination,
(g) cross section of the wear track showing the propagation of sub-surface crack due to the presence of porosity and
(h) Hertzian-type cracks developed due to surface tensile stress.
