Syllabus

Syllabus MM4109: 36 Hours

Module I (Introduction and applications): Definition, Alloying elements in Stainless steel and their functions. Effect of alloying elements on properties of Stainless steel. Classification of Stainless Steels. Cost implications of alloy additions and substitutes. Stainless steel production in India and all over the world. Automotive, Railways & Transport, Architecture, Building & Construction, Reinforcement bars, Roofing sheets, utensils, Furniture, Material Handling applications, Process Industries, Biomedical applications. Life Cycle Cost Analysis. 2 hrs

Module II (Making and Processing): Final Annealing and Pickling, Skin Pass Mill, Strip Grinding Line. Finishing of Stainless Steel. Color Coating of Stainless Steels. Special melting technique for stainless steel, Hot and cold working of stainless steel, Final processing of heat treatable and non-heat treatable stainless steel. 06 Hrs

Module III (Phase Transformations and Heat treatments): Relevance of Nickel equivalent and Chromium equivalent, The Schaeffler–Delong diagram, Role of alloying elements in ferrite and austenite stabilization, Role of deformation on phase transformation. Heat treatment of stainless steels-ferritic, martensitic, austenitic, duplex, precipitation hardenable, Ti- and Nb- stabilized grade stainless steels. Precipitation reaction in stainless steels, high temperature (475°C) embrittlement, carbide and nitride precipitation. 08 Hrs

Module IV (Mechanical Behaviour and Properties): Deformation behavior of stainless steel. Role of precipitates on mechanical properties. Mechanical properties of different grades of stainless steels-tensile, hardness, impact, fatigue. Testing, Handling, and Storage of Stainless steel: PMI technique, XRF, Surface Reflectivity measurement, Recommended procedures for storage. 04 Hrs

Module V (Fabrication): Specific difficulties associated with the welding of – Martensitic-, Ferritic-, Austenitic-, Duplex, Precipitation Hardened-, Martensitic, Semiaustenitic-, Austenitic- precipitation hardened stainless steels. Welding of dissimilar metal combinations with stainless steels. Sensitization/Weld decay: Causes, mechanisms, remedies, High-temperature sensitization, 475oC embrittlement, a' phase transformation, Distortion-Causes, mechanisms, remedies, Effect of alloying elements on weldability of Stainless Steels, Schaeffler De Long diagram interpretations. Tools and Equipment. Issues faced during fabrication of stainless steel and its solutions. 08 Hrs

Module V (Corrosion): Microbiologically Induced Corrosion (MIC), Different corrosion testing procedures (Laboratory tests including salt spray test, Pilot plant test, service tests and field tests). Role of precipitates on corrosion, Inhibitors for corrosion prevention, corrosion resistance of stainless steels. 08 Hrs

Plant visit: Stainless steel industry visit in a company like Jindal Stainless.

To craft the practical scenario among the undergraduate students about steel and stainless steel making at shop floor in Indian steel industries along with the phase transformation aspect.

To improve the general understanding of testing of steels including mechanical and corrosion behavior.

To develop the general cognizant about the use of stainless steel in different Indian manufacturing sectors.

To bridge the gap of institute and industry aspects through interaction with Industry experts.

The course outcomes (COs) are as follows:

CO1
The undergraduate students will get an idea of the making, processing, storage, and application of different types of stainless steel.

CO2
Students will develop an in-depth understanding of the heat treatment, phase transformation, and precipitation reactions associated with stainless steels.

CO3
Students will acquire comprehensive knowledge about different types of stainless steel, their compositions, and characteristics.

CO4
Students will acquire ideas about the mechanical behavior of different types of stainless steel and their deformation mechanisms. They will also understand the high-temperature characteristics of stainless steel.

CO5
Students will know about the fabrication processes related to stainless steel and associated difficulties.

CO6
Students will understand the corrosion resistance properties and associated mechanisms of stainless steel.

E. T. Turkdogan, Fundamental of Steelmaking, The Institute of Materials, , London, 1996.

Brahma Deo and Rob Boom, Fundamentals of Steelmaking Metallurgy, Prentice-Hall International , 1993

F B Pickering, Physical metallurgy of Stainless-Steel Development, International Materials Reviews, Volume 21, ASM International , 1976

Bela Leffler, Stainless Steel and Their Properties, Outokumpu , 2013