Investigation on Wear Characteristics of TiBFe Composites Containing 10 at.% Boron and 10-30 at.% Iron

Autor: Vikas Jindal, K. S. R. Chandran, Rajnesh Tyagi, Ashwani Ranjan
Rok vydání: 2020
Předmět:
Zdroj: Journal of Materials Engineering and Performance. 29:6333-6342
ISSN: 1544-1024
1059-9495
DOI: 10.1007/s11665-020-05130-z
Popis: Present work aims to synthesize spark plasma-sintered Ti–TiB–Fe composites with varying Fe content via reaction between Ti, Fe and TiB2 and explore their potential as tribological material. The content of boron was kept constant at 10 at.%, whereas the Fe was added in 10, 20 and 30 at.% to result in three different types of composites designated as TiBFe1010, TiBFe1020 and TiBFe1030. Sliding wear tests were conducted under a reciprocating mode against a counterface of AISI 52100 steel ball at different loads of 10, 15, 20 and 25 N. In situ reaction between Ti, TiB2 and Fe resulted in the formation of TiB and FeTi as confirmed by x-ray diffraction analysis. The hardness of the composites increased from 488 to 871 HV0.1 with the addition of Fe from 10 to 30 at.%, which has been attributed to the increasing amount of hard and brittle FeTi. The composite TiBFe1020 showed the lowest wear rate, whereas TiBFe1030 showed the lowest coefficient friction at all the loads. The observed behavior has been explained on the basis of the presence of a transfer layer of wear debris on the worn surface, its detachment, and area coverage provided to underlying material along with the hardness of the composite. The mechanisms of wear appear to be a combination of plowing, abrasion, and delamination, as revealed by SEM examination of worn surfaces.
Databáze: OpenAIRE
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