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Titus Thankachan,K. Soorya Prakash,V. Kavimani,S. R. Silambarasan 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.2
This research demonstrates the application of machine learning models and statistics methods in predicting and analyzingdry sliding wear rates on novel copper-based surface composites. Boron nitride particles of varying fractions was depositedexperimentally over the copper surface through friction stir processing. Experimental and statistical analysis proved thatthe presence of BN particles can reduce wear rate considerably. Analysis of worn-out surface revealed a mild adhesive wearduring low load condition and an abrasive mode of wear during higher load conditions. Artificial neural network based feedforward back propagation model with topology 4-7-1 was modeled and prediction profiles displayed good agreement withexperimental outcomes.
Characterization of ZrC reinforced AA6061 alloy composites produced using stir casting process
T. Satish Kumar,S. Shalini,M. Ramu,Titus Thankachan 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.1
In the present study, effect of ZrC vol.% on mechanical properties of AA6061 metal matrix composites (MMCs) produced via stir casting technique was investigated. The vol.% of ZrC particles was varied as 5,10 and 15. The composites were characterized for its microstructure and mechanical properties and their relationships were obtained. The scanning electron microscope (SEM) images revealed uniform distribution and good bonding between the AA6061 alloy and the ZrC particles. The mechanical properties of the AA6061 alloy was found to significantly improve with the addition of ZrC particles from 5 to 15 vol.%, the hardness increased from 32 to 68 HV, yield strength increased from 50 to 86 MPa and the ultimate tensile strength increased from 118 to 165 MPa. However, the % of elongation of the composite samples decreased with 15 vol.% addition of ZrC particles. Sliding wear behaviour of the composites was investigated using a pin-on-disc wear tester at a load of 9.8 N and addition of ZrC particles was significantly found to reduce the wear rate of AA6061 alloy.