Dry wear behavior of A356-SiCp functionally graded composite in unidirectional and reciprocating contacts
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 23 September 2021
Issue publication date: 28 October 2021
Abstract
Purpose
The purpose of this study is to distinguish the difference in tribological behavior of functionally graded composites in two sliding modes, namely, unidirectional and reciprocating.
Design/methodology/approach
A356-(10 Wt.%)SiCp functionally graded composite material (FGM) was prepared by vertical centrifugal casting and then a comparison was made between the tribological characteristics using pin-on-disk and pin-on-reciprocating plate configurations under identical operating conditions (sliding distance (s): 350 m; load (W): 30 = W = 120 N, in steps of 30 N; and velocity (v): 0.2 = v = 1.2 m/s, in steps of 0.2 m/s). Two types of test pins were considered, namely, a test pin taken from the outer zone of the FGM with maximum particle concentration and a test pin taken from the inner zone of the FGM in a matrix-rich region.
Findings
The study revealed that, for the test pin taken from the outer zone of the FGM in the low-velocity range (0.2–0.4 m/s), the reciprocating wear of the friction pair was dominant, while unidirectional wear was dominant in the velocity range of 0.6–0.8 m/s for the entire load range investigated. However, when the velocity was increased from 1.0 to 1.2 m/s, conflicting nature of dominancy in the wear characteristics of the friction pair was observed, depending on the loading condition. In addition, the inner zone FGM pin underwent seizure in the reciprocating mode, whereas this phenomenon was not seen in the unidirectional mode.
Originality/value
Differences in wear and friction characteristics of FGM friction pairs in two different sliding modes were investigated over a wide range of operating parameters.
Keywords
Acknowledgements
The authors are acknowledging the scholarship received to first author from AICTE, Government of India under QIP scheme for carrying out his research work. The authors are also gratefully acknowledging the fund received for the fabrication of the Pin-on-reciprocating plate tribometer from Centre for Engineering Research and Development under the APJ Abdul Kalam Technological University, Government of Kerala, India.
Citation
John, P., Vamadevan Rajam, R., Mattacaud Ramachandralal, R. and Komalangan, K. (2021), "Dry wear behavior of A356-SiCp functionally graded composite in unidirectional and reciprocating contacts", Industrial Lubrication and Tribology, Vol. 73 No. 8, pp. 1105-1112. https://doi.org/10.1108/ILT-04-2021-0139
Publisher
:Emerald Publishing Limited
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