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Advances in welding and joining technologies

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1323 min

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Mechanics & Turbomachinery

Mechanical Engineering

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Why enroll

Participants join this course to gain insight into advanced and emerging welding and joining technologies that are increasingly adopted in high-value manufacturing industries. The course enables learners to move beyond conventional welding methods and understand modern processes such as laser, electron beam, and solid-state joining, which are critical for working with advanced and dissimilar materials.

The program is particularly beneficial for students, researchers, and industry professionals who aim to enhance their technical competence in materials joining, process selection, and quality control. By understanding recent technological advancements, metallurgical considerations, and industrial applications, participants strengthen their ability to address complex joining challenges, improve joint performance, and remain competitive in sectors such as aerospace, automotive, energy, and advanced manufacturing.

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Is this course for you?

You should take this if

You work in Mechanics & Turbomachinery
You're a Mechanical Engineering / Production Engineering professional
You have 3+ years of hands-on experience in this field
You prefer self-paced learning you can revisit

You should skip if

You're new to this field with no prior experience
You need a different specialisation outside Mechanical Engineering
You need live interaction with an instructor

Course details

Advances in Welding and Joining Technologies focuses on modern and emerging techniques used to join advanced materials in high-performance engineering applications. The course builds upon fundamental welding principles and explores recent developments in welding processes, equipment, and process control aimed at improving joint quality, productivity, and reliability. Emphasis is placed on understanding the science of heat sources, material behavior, and metallurgical transformations occurring during advanced joining operations.

The course covers state-of-the-art welding and joining methods such as laser beam welding, electron beam welding, friction stir welding, hybrid welding processes, brazing, diffusion bonding, and adhesive bonding. It also addresses the joining of dissimilar materials, lightweight alloys, composites, and high-temperature materials used in aerospace, automotive, energy, and manufacturing sectors. By integrating process fundamentals with industrial case studies and quality assessment techniques, the course equips participants with the knowledge required to select, design, and optimize advanced welding and joining technologies for modern engineering challenges.

Source : NPTEL [Youtube]

Course suitable for

Key topics covered

Fundamentals of welding and joining
Laser and electron beam weldinhg
solid state welding processes
computational welding machines
micro and nano joining processes
welding metallurgy

Course content

The course is readily available, allowing learners to start and complete it at their own pace.

23 lectures22 hr 3 min

Fundamentals of Welding and Joining Part I
59 min
Fundamentals of Welding and Joining Part II
70 min
Fundamentals of Welding and Joining Part III
79 min
Fundamentals of Welding and Joining Part IV
20 min
Fundamentals of Welding and Joining Part V
63 min
Laser and Electron Beam Welding Part I
77 min
Laser and Electron Beam Welding Part II
72 min
Solid State Welding Processes Part I
34 min
Solid State Welding Processes Part II
68 min
Solid State Welding Processes Part III
52 min
Computational Welding Mechanics Part I
55 min
Computational Welding Mechanics Part II
69 min
Computational Welding Mechanics Part III
53 min
Micro and Nano Joining Processes Part I
67 min
Micro and Nano Joining Processes Part II
72 min
Micro and Nano Joining Processes Part III
66 min
Welding Metallurgy Part I
60 min
Welding Metallurgy Part II
60 min
Welding Metallurgy Part III
63 min
Welding Metallurgy Part IV
18 min
Welding and Joining of Non-Metals Part I
48 min
Welding and Joining of Non-Metals Part II
45 min
Metal Transfer in Welding and Metal Printing
53 min

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Questions and Answers

Q: You're reviewing a laser-hybrid weld cell after a near-miss and you search "laser hybrid welding fume extraction interlock failure arc instability". The extraction system interlock tripped but the weld head kept running for 8 seconds. What does this safeguard NOT protect against?

A: Optics damage is the consequence here — assuming the interlock protects the laser source leads to expensive downtime when the fiber gets hit by back-reflection. The fume extraction interlock is meant to manage airborne contaminants and secondary arc stability; it doesn’t shield the laser optics from reflected energy, which is handled by optical isolators and process parameter control.

Q: During friction stir welding of 8 mm AA6082, you notice surface galling and look up "friction stir welding tool shoulder overheating surface galling response". Tool rotation is increased by 15% while traverse speed is held constant. What’s the best response?

A: Excessive heat leads to surface tearing and shortened tool life, so chasing it with force or materials just accelerates wear. Reducing rotation and compensating with traverse speed lowers heat input while maintaining material flow, stabilizing the plasticized zone instead of overheating it.

Q: You're sanity-checking a resistance spot weld schedule and search "estimate resistance spot welding heat input kA ms sheet steel". Two 1.2 mm low-carbon steel sheets are welded at 9 kA for 180 ms with 200 micro-ohm contact resistance. Order-of-magnitude heat generated at the interface is?

A: Underestimating heat would cause failed peel tests and rework; overestimating drives unnecessary schedule changes. Using Q = I²Rt gives 9,000² × 200e-6 × 0.18 ≈ 290 J, right in the range needed to form a sound nugget without expulsion.

Q: A vendor submits a WPS for a nickel alloy repair weld and you search "ASME Section IX essential variable change laser welding repair". They changed from GTAW to laser beam welding but kept all other parameters. Why does the code force requalification?

A: Skipping requalification risks a failed bend test or brittle repair in service. The code ties qualification to how heat is delivered; laser welding produces a different fusion and cooling behavior, so mechanical performance can’t be assumed equivalent to GTAW.