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, Volume 11, Issue 1, pp 355–366 | Cite as

Friction, Wear and Mechanical Properties of Al-Si LM6 Cast Alloy Processed in Semi-solid Stage

  • Mayank AgarwalEmail author
  • Rajeev Srivastava
Original Paper
  • 37 Downloads

Abstract

Dry sliding wear characteristics, mechanical properties and microstructural behavior of powder-chip based reinforcement silicon rich LM6 aluminum alloy, fabricated by semi-solid casting were investigated. Wear tests were conducted on powder-chip reinforced cast samples using the pin on disc apparatus under 5, 10 and 15 N with 0.4, 0.8 and 1.2 m/s sliding speeds for 250, 500 and 750 m sliding distances versus EN31 tool steel hardened to 62 HRC. An observation from the microstructure images indicated that the porosity of the cast composite reduces due to the distribution of un-melted chips inside the short cavities by the addition of reinforcement and confirmed with the obtained results of density. The fracture in cast specimens indicates that the micro-cracks were prevalently propagated along the broken eutectic silicon particles. Additionally, wear resistance was increased reasonably due to the inclusion of reinforcement under metallic wear environment. Worn surfaces SEM, EDS, XRD and, AFM analysis suggests that surfaces plastically deformed along with silicon brittle asperities which stuck on the softer surface of the contact layers, while dominant wear mechanisms were found from these surfaces and wear debris.

Keywords

Wear Semi-solid casting Mechanical properties Microstructure EDS and XRD AFM Tribo-layer 

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Notes

Acknowledgements

The Authors would like to thank Dr. Prabhat Kumar Dwivedi, Senior Scientific Officer, center of nanosciences, Indian Institute of Technology Kanpur, for his assistance extended during this work. Authors are highly appreciating the contribution of Workshop and Machine element lab members of Motilal Nehru National Institute of Technology, Allahabad.

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringMotilal Nehru National Institute of Technology AllahabadAllahabadIndia

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