Mechanical properties of the oxide film on ELID electrolytic copper-based grinding wheel by nanoindentation

ABSTRACT

The mechanical properties of the oxide film on the copper based grinding wheel were studied by nanoindentation technique. Analysis of load displacement shows that the creep phenomenon occurs during the loading stage. Results show that the oxide film and the matrix have different characteristics, and the rigidity of the copper based grinding wheel is 0.6–1.3 mN/nm, which is weaker than that of the matrix; the hardness of oxide film is 2000–2300 MPa, harder than the matrix; and the elastic modulus of oxide film is 100–120 GPa, higher than the matrix.

KEYWORDS:

• ELID (Electrolytic In-process Dressing) grinding
• oxide film
• copper based grinding wheel
• mechanical property

Funding

This work was supported by the National Natural Science Foundation, China (Grant No. 51475147), and by the key project of Henan Province Science and Technology Research (Grant No. 13A460341). Also funded by the Natural Science Foundation of the Jiangsu Province, China (Grant No. BK20150406) and the technical project of Nantong, China (Grant No. MS12016015).