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Welding Engineering

Welding Engineering. Instructor: Dr. D. K. Dwivedi, Department of Mechanical and Industrial Engineering, IIT Roorkee. Welding is one most the most commonly used fabrication techniques. For successful application of welding to produced sound weld joints, it is utmost important to understand the science and technology behind the welding. This course is aimed at familiarizing the students with the fundamentals of arc welding processes, weld joint design, metallurgical aspects in welding of steel, and assessing the quality and suitability of weld joints. Topics related with weldability of metals (steel, cast iron and aluminium alloys of commercial importance) shall also be covered to equip the students technological input for handling the problems in welding of selected metals and alloys. (from nptel.ac.in)

Lecture 31 - Edge Preparation

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Introduction

Lecture 01 - Introduction to Welding Engineering

Lecture 02 - Classification of Welding Processes

Lecture 03 - Classification of Welding Processes (cont.)

Lecture 04 - Sources of Heat and Protection of Weld Pool

Lecture 05 - Protection of Weld Pool

Physics of Welding Arc

Lecture 06 - Introduction to the Physics of Welding Arc

Lecture 07 - Fundamentals of Arc Initiation

Lecture 08 - Arc Maintenance and Arc Characteristics

Lecture 09 - Arc Forces

Lecture 10 - Arc Efficiency

Lecture 11 - Melting Rate in Different Welding Processes

Welding Power Source

Lecture 12 - Types of Power Sources and their Characteristics

Lecture 13 - Types of Power Sources and their Characteristics (cont.)

Arc Welding Processes

Lecture 14 - Shielded Metal Arc Welding Process (SMAW)

Lecture 15 - Shielded Metal Arc Welding Process (cont.)

Lecture 16 - Gas Tungsten Arc Welding Process (GTAW)

Lecture 17 - Gas Tungsten Arc Welding Process (cont.)

Lecture 18 - Plasma Arc Welding Process (PAW) and Submerged Arc Welding Process (SAW)

Lecture 19 - Submerged Arc Welding Process (SAW)

Lecture 20 - Gas Metal Arc Welding Process (GMAW)

Lecture 21 - Brazing, Soldering and Braze Welding

Lecture 22 - Braze Welding and Electroslag Welding

Heat Flow in Welding

Lecture 23 - Welding Thermal Cycle (WTC)

Lecture 24 - Effect of WTC and Cooling Rate in Welding

Lecture 25 - Cooling Rate

Lecture 26 - Peak Temperature and Solidification Rate

Lecture 27 - Residual Stress

Lecture 28 - Residual Stress (cont.)

Design of Weld Joints

Lecture 29 - Introduction to Design of Weld Joints

Lecture 30 - Types of Joints and Welds

Lecture 31 - Edge Preparation

Lecture 32 - Design for Static and Fatigue Loading

Lecture 33 - Fatigue Fracture of Weld Joints

Lecture 34 - Fatigue Fracture of Weld Joints (cont.)

Inspection and Testing of Welding Joint

Lecture 35 - Introduction to Inspection and Testing of Welding Joint

Lecture 36 - Destructive Testing and Non-destructive Techniques

Weldability of Metal

Lecture 37 - Understanding Weldability

Lecture 38 - Reactions in Weldment

Lecture 39 - Weldability of Aluminium Alloys

Lecture 40 - Failure Analysis and Prevention