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Title: Friction and wear behaviors of Fe-14Mn-9Cr-5Ni-6Si and Fe-13Cr-12Co-8Mn-6Ni-6Si shape memory alloys
Authors: Charfi, Amine
Trabelsi, Mohamed
Kharrat, Mohamed
Keywords: Iron-based shape memory alloys;Friction behavior;Wear behavior
Issue Date: Oct-2019
Publisher: NISCAIR-CSIR, India
Abstract: Iron-based shape memory alloys are the materials that can be especially used in civil engineering structures and pipe coupling because of their good mechanical properties and their low price compared with Ni-Ti and cooper-based alloys. However, their applications have been remained limited so it is very important to determine the wear behaviours of this family of materials. This paper presents friction and wears behaviours of Fe-14Mn-9Cr-5Ni-6Si and Fe-13Cr-12Co-8Mn-6Ni-6Si under both dry and lubricated conditions by means of reciprocating ball-on-flat tribometer. The aim of this study is to determine the influence of chemical composition of iron-based shape memory alloys on tribological behaviours of material and compare their behaviours with that of Fe-32Mn-6Si which is considered as a basis reference. Morphologies and microstructures of specimens have been characterized by optical microscope. The wear tests and the optical micrograph observations of studied alloys have shown that the tribological behaviors of shape memory alloys depend on the chemical composition of material which is mainly influenced by the presence of nickel, chromium and cobalt in material. The results have shown that friction coefficients of Fe-14Mn-9Cr-5Ni-6Si and Fe-13Cr-12Co-8Mn-6Ni-6Si are almost equal and less than of Fe-32Mn-6Si. Moreover, the addition of cobalt in the chemical composition of shape memory alloys reduces considerably the stick-slip phenomenon. It has been also shown that wear resistance of alloys in oily friction is higher than that in dry friction.
Page(s): 363-368
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Appears in Collections:IJEMS Vol.26(5&6) [October & December 2019]

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