CAS331 High Temperature Materials Syllabus:
CAS331 High Temperature Materials Syllabus – Anna University Regulation 2021
OBJECTIVES
• To learn the concepts of damage mechanism.
• To acquire knowledge in of components at elevated temperatures
• To understand the concept of creep
• To design material for creep resistance
• To introduce to the theory of super alloys and other advanced materials
UNIT I CREEP
Factors influencing functional life of components at elevated temperatures, definition of creep curve, various stages of creep, metallurgical factors influencing various stages, effect of stress, temperatures and strain rate.
UNIT II DESIGN FOR CREEP RESISTANCE
Design of transient creep time, hardening, strain hardening, expressions of rupture life of creep, ductile and brittle materials, Monkman-Grant relationship.
UNIT III FRACTURE
Various types of fracture, brittle to ductile from low temperature to high temperature, cleavage fracture due to micro void coalescence – diffusion controlled void growth; fracture maps for different alloys and oxides.
UNIT IV OXIDATION AND HOT CORROSION
Oxidation, Pilling, Bedworth ratio, kinetic laws of oxidation – defect structure and control of Oxidation by alloy additions, hot gas corrosion deposit, modified hot gas corrosion, fluxing mechanisms, effect of alloying elements on hot corrosion, interaction of hot corrosion and creep, methods of combat hot corrosion.
UNIT V SUPER ALLOYS AND OTHER MATERIALS
Iron base, Nickel base abd Cobalt base super alloys, composition control, solid solution strengthening, precipitation hardening by gamma prime, grain boundary strengthening, TCP phase, embrittlement, solidfication of single crystals, Intermetallics, high temperature ceramics.
TOTAL: 45 PERIODS
COURSE OUTCOMES:
• Apply the concepts of damage mechanism.
• Describe the knowledge of components at elevated temperatures
• Explain the concept of creep
• Design materials to able to have creep resistance
• Explain the theory of super alloys and other advanced materials
TEXT BOOKS
1. Raj. R., “Flow and Fracture at Elevated Temperatures”,American Society for Metals, USA, 1985.
2. Hertzberg R.W., “Deformation and Fracture Mechanics of Engineering materials”, 4th Edition, John Wiley, USA, 1996.
3. Courtney T .H, “Mechanical Behaviour of Materials”,McGraw-Hill, USA, 1990.
REFERENCES
1. Boyle J.T, Spencer J, “Stress Analysis for Creep” ,Butterworths, UK, 1983.
2. Bressers.J., “Creep and Fatigue in High Temperature Alloys”, Applied Science, 1981.
3. McLean D., “Directionally Solidified Materials for High Temperature Service”, The Metals Society, USA, 1985.