The role of friction to the indentation size effect in amorphous and crystallized Pd-based alloy
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The role of friction between the indenter and the test specimen in amorphous and crystallized Pd40Cu30Ni10P20 alloy was investigated through instrumented nanoindentation under unlubricated and lubricated conditions. It was found that the reduction of hardness with the increasing penetration depth, i.e., the indentation size effect (ISE), becomes milder in the lubricated test than that in the unlubricated measurement. The important role of friction that related to the surface area to volume (S/V) was discussed in terms of the proportional specimen resistance (PSR) model and energy dissipation.
KeywordsMetallic Glass Strain Gradient Indentation Depth Lubricate Condition Indentation Size Effect
This work was financially supported by the National Nature Science Foundation of China under Grant No. 50635020. The work was also partially supported by the funding from the Department of Industrial System and Engineering, the Hong Kong Polytechnic University. The authors are grateful to the Analytical and Testing Center, Huazhong University of Science and Technology for their technical assistance.
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