Abstract
Laser-based additive manufacturing (LBAM) is a versatile manufacturing technique, extensively adopted to fabricate metallic components of enhanced properties. The current review paper provides a critical assessment of the fabricated metallic coatings and parts through LBAM-processes [e.g., laser metal deposition (LMD) and selective laser melting (SLM)] for high temperature tribological applications. A succinct comparison of LBAM-fabrication and conventional manufacturing is given. The review provides an insight into the sophisticated application-driven material design for high temperature tribological contacts. The review highlights the major mechanisms behind the improvement in the tribology of the laser-deposits; properties evolving as a consequence of the microstructure, lamellar solid lubricants, sulfides, soft metals, lubricious oxides, and self-lubricating surfaces.
Highlights
In the age of rapid technological advancements in engineering sectors, the production systems are continuously evolving to meet the complex challenges of the present day
The harsh operating conditions and complexity of the mechano-chemical processes involved offer a great challenge from the perspective of material design, manufacturing and surface engineering of the industrial production systems and the products
This review has presented a comprehensive state-of-art for application-specific material designs followed by Laser-based additive manufacturing (LBAM) for high temperature tribological applications
Summary
In the age of rapid technological advancements in engineering sectors, the production systems are continuously evolving to meet the complex challenges of the present day. Such advancements are raising the robustness, quality and performance barriers of the production systems and of the products due that have to operate under extreme conditions. The operating temperature of a given manufactured part may range up to 500◦C and in some cases up to 1,000◦C These elevated temperatures (often coupled with thermal fatigue) can have detrimental effects on the mechanical properties of the materials and their surface morphology. The harsh operating conditions and complexity of the mechano-chemical processes involved offer a great challenge from the perspective of material design, manufacturing and surface engineering of the industrial production systems and the products
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