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Indian Institute of Technology Madras

Welding Of Advanced High Strength Steels For Automotive Applications

Indian Institute of Technology Madras and NPTEL via Swayam

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Overview

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The use of advanced high strength steels (AHSS) is increasingly preferred in automotive applications due to improved crash energy management and enhanced strength-ductility combinations, resulting in greener and safer vehicles. The weldability of AHSS is generally poorer than conventional steels due to the high alloying contents required to obtain multi-phase microstructure. This course is aimed to discuss the (i) role of alloying elements in stabilizing multi-phase microstructures of AHSS, (ii) effect of weld thermal cycles on the evolution of microstructures and (iii) weldability of AHSS.INTENDED AUDIENCE : Final year bachelors and masters students in Metallurgy, Mechanical, Automobile and Production Engineering. Industrial personnel working in automotive and steel making industries.PREREQUISITES : Final year B.E/B.Tech students or Graduates of Metallurgical/Mechanical/Automobile/Production Engineering,Basic knowledge of steel physical metallurgy and welding processes.INDUSTRY SUPPORT : All automotive manufacturers and their OEMs and Steel plants.

Syllabus

Week 1: Introduction to physical metallurgy of advanced high strength steelsWeek 2: Introduction to welding processes in automotive industries (Advanced Gas Metal Arc, Resistance Spot and Laser Welding Processes).Week 3: Welding metallurgy of advanced high strength steels – Effect of weld thermal cycles on the stability of phases,solidification behaviour,segregationand hot cracking susceptibility.Week 4: Mechanical properties of advanced high strength steel weldments – Tensile shear testing, HAZ softening characteristics,role of modified weldthermal cycles (post pulsing and post weld heat treatments) to improve the mechanical properties

Taught by

Prof. Murugaiyan Amirthalingam

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