Course Details

Subject {L-T-P / C} : CR4102 : Tribology of Materials { 3-0-0 / 3}

Subject Nature : Theory

Coordinator : Prof. Debasish Sarkar

Syllabus

Module 1
Introduction: Different types of materials and applications, Surface characterization (Physico – chemical characteristics of surface layers) Surface visualization, Geometry of non – conforming surfaces (analysis and measurement of surface roughness), Surface and subsurface stress distributions and Hertzian contact between solid surfaces, Adhesion and Ploughing: 8 Contact Hours

Module 2

Friction Testing, Frictional behavior (Solid – solid contact, liquid mediated contact), Friction mechanism of metals, ceramics and polymers, solid lubricants. Thermal properties of sliding surfaces, Flash Temperature and their mode of estimation: 6 Contact Hours

Module 3

Wear: Classification of wear and wear testing, role of humidity the various modes of wear: adhesive, delamination, fretting, abrasive, erosive, corrosive, oxidizing (mild and severe), melt and the wear-mechanism maps, types of particle present in wear debris, Wear Debris particle analysis and prediction of component performance: 8 Contact Hours

Module 4

Surface Engineering Methods to reduce wear: Electrolytic, Spraying, Hard-facing, Chemical Vapour Deposition (CVD), Plasma Vapour Deposition (PVD), Mechanical methods, Surface melting and Thermo chemical treatments: 6 Contact Hours

Module 5

Lubrication: Solid lubricants, Liquid lubricants, Fluid film lubrication, Introduction to Elasto-Dynamic (ED) and Elasto- Hydro Dynamic (EHD) Lubrication, Mixed and Boundary lubrication, micro and nano tribology, solution of tribological problems, Competitive analysis of friction wear and lubrication phenomena: 6 Contact Hours

Module 6

Case Studies of different set of tribocouples to correlate the theoretical understanding, research perception and product development for structural and load bearing applications: 6 Contact Hours

Course Objectives

Course Outcomes

After completing the course, the students will have <br />1. A knowledge of the tribological properties friction, wear and lubrication to estimate failure analysis of bulk or coatings. <br />2. Correlate important wear behavior with the end properties of fabricated ceramics <br />3. Capability to know how material is subject to premature damage under relative motion and load bearing applications. <br />4. Knowledge to suggest tailoring of mechanical properties for customized wear resistance product intended for specific and/or strategic applications <br />Course Outcome: <br />CO1: To be well versed about different load bearing ceramics and the properties required for wear resistant application areas. <br />CO2: To correlate fundamental aspects on stress generation with respect to different contact gepmetry and their utility to analyse the tribological properties <br />CO3: Able to design and fabricate different oxide based ceramics for specific applications like hip replacement femoral head- acetabular socket, cutting tools, disc brakes, wear resistance thermal barrier coatings, etc. <br />CO4: Able to do post-failure analysis of components to ascertain the root cause of failure and to design processing and microstructural parameters for property upgradation and better reliability. <br />CO5: Able to think of innovative design and new materials with societal benefits.

Essential Reading

Supplementary Reading

Journal and Conferences