Abstract

The influence of milling time on the tribological behavior of a CoeCreMo alloy designed for
biomedical applications, synthesized via mechanical alloying is investigated. Elemental Co,
Cr and Mo powders are milled using different milling times (2, 6, 12 and 18 h) in a highenergy
ball mill. The resulting powders were subjected to cold uniaxial and hot isostatic
pressing respectively, followed by sintering to obtain cylindrical samples, which were
evaluated for their structural, mechanical and the wear behavior. Results showed that the
grain and crystallite sizes of the powders decreased with increasing milling time, reaching
low values of <10 mm and 32 mm respectively, at higher milling times. Furthermore, the
wear rates and the coefficients of friction were lower, at higher milling times due to high
densities (96%), and higher elasto-plastic resistance, as presented by the H/E and H3/E2
values of 0.026 and 0.0021 GPa, respectively. Increased milling time enables the refinement
of grains and reduction in porosity in the CoeCreMo alloy, which in turn increases the
alloy\'s elasto-plastic resistance and enhances its wear resistance.

Information

Item Type:	Journal
Divisions:
ePrint ID:	4408
Date Deposited:	2023-09-13
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/en/publication/article/4408

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