TY - JOUR
T1 - Wear studies of spark plasma sintered ZrO2 reinforced Ti-6Al-4V alloy
AU - Semetse, Lerato
AU - Obadele, Babatunde Abiodun
AU - Raganya, Lerato
AU - Olubambi, Peter Apata
N1 - Funding Information:
The authors would like to acknowledge the National Research Foundation (NRF) in South Africa for financial support.
Publisher Copyright:
© 2019 Elsevier Ltd. All rights reserved.
PY - 2019
Y1 - 2019
N2 - The aim of this paper is to investigate wear and tribological properties of powder metallurgy processed Ti-6Al-4V with additions of ZrO2 to produce Ti-6Al-4V/ZrO2 composites consolidated via spark plasma sintering. The spark plasma sintered compacts were examined using optical microscopy (OM) and scanning electron microscopy (SEM) techniques. Dry sliding wear tests were carried out at 5 N and 10 N using a pin-on-disk tribometer. Optical micrographs showed that additions of ZrO2 to Ti-6Al-4V promoted the formation of agglomerated ZrO2-rich particles in the matrix of Ti-6Al-4V. The friction coefficient values were very similar for all compositions, with values ranging between 0.35 and 0.55, with the lowest COF value recorded for Ti6Al4V/5ZrO2 composite at 10 N applied load. Wear and microhardness results indicate that the hardness and the wear resistance improved with increasing content of ZrO2. The lowest surface degradation was observed for Ti-6Al-4V with 10% ZrO2. The low wear resistance of Ti-6Al-4V in comparison to Ti-6Al-4V/ZrO2 composites can be attributed to the low hardness of this alloy. Adding ZrO2 to Ti-6Al-4V was found to significantly improve the wear and hardness properties of Ti-6Al-4V and may therefore potentially broaden the scope of application and performance of Ti-based materials in critical applications; particularly where wear and friction are critical concerns.
AB - The aim of this paper is to investigate wear and tribological properties of powder metallurgy processed Ti-6Al-4V with additions of ZrO2 to produce Ti-6Al-4V/ZrO2 composites consolidated via spark plasma sintering. The spark plasma sintered compacts were examined using optical microscopy (OM) and scanning electron microscopy (SEM) techniques. Dry sliding wear tests were carried out at 5 N and 10 N using a pin-on-disk tribometer. Optical micrographs showed that additions of ZrO2 to Ti-6Al-4V promoted the formation of agglomerated ZrO2-rich particles in the matrix of Ti-6Al-4V. The friction coefficient values were very similar for all compositions, with values ranging between 0.35 and 0.55, with the lowest COF value recorded for Ti6Al4V/5ZrO2 composite at 10 N applied load. Wear and microhardness results indicate that the hardness and the wear resistance improved with increasing content of ZrO2. The lowest surface degradation was observed for Ti-6Al-4V with 10% ZrO2. The low wear resistance of Ti-6Al-4V in comparison to Ti-6Al-4V/ZrO2 composites can be attributed to the low hardness of this alloy. Adding ZrO2 to Ti-6Al-4V was found to significantly improve the wear and hardness properties of Ti-6Al-4V and may therefore potentially broaden the scope of application and performance of Ti-based materials in critical applications; particularly where wear and friction are critical concerns.
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U2 - 10.1016/j.matpr.2019.10.033
DO - 10.1016/j.matpr.2019.10.033
M3 - Conference article
AN - SCOPUS:85090134787
SN - 2214-7853
VL - 28
SP - 468
EP - 474
JO - Materials Today: Proceedings
JF - Materials Today: Proceedings
T2 - 2nd International Conference on Recent Advances in Materials and Manufacturing Technologies, IMMT 2019
Y2 - 20 November 2019 through 22 November 2019
ER -