# Joining Technologies for Metals - Institution: IIT Roorkee - Department: Mechanical Engineering - Teacher: Prof. Dheerendra Kumar Dwivedi - Level: Undergraduate - Language: English - Subjects: Engineering - Source: [NPTEL](https://nptel.ac.in/courses/112107213) - Licence: [CC BY-NC-SA](https://nptel.ac.in/faq) (Non-commercial use only.) - Syllabus: [at the source](https://nptel.ac.in/courses/112107213) - Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words) It is proposed to include following joining technologies of commercial importance under different groups of processes. A) Fundamentals of Metal Joining Technologies: mechanisms for obtaining metallic continuity: fusion, deformation, diffusion, chemical interactions B) Fusion based processes: principle of fusion welding processes, oxy-fuel has welding, common arc welding processes, high energy beam welding processes, resistance welding processes, newer variants of fusion welding processes C) Solid-liquid joining processes: brazing and soldering, braze welding, cold metal transfer welding, D) Solid state joining processes: friction welding and its variants, diffusion bonding, ultrasonic welding and explosive welding and E) Adhesive joining: design, procedure, and applications F) Metallurgical Aspects of Welding: weld thermal cycle, solidification of weld metal G) Weldability of carbon steel, alloys steel, stainless steels; Fe-C, TTT, CCT and schaffler diagram for understanding the metallurgical transformation in weld and heat affected zone., basics of residual stresses H) Common issues related with joining technologies their causes and remedies: hardening and softening of heat affected zone, porosity, cracking, Intended audience: It is a core course for UG/PG students, practicing engineers. ## Lectures 1. [Introduction: Manufacturing and Joining](https://invisiblenetwork.ai/learn/nptel/112107213/9ad8e21591bf) (YouTube) 2. [Fundamental mechanisms of Joining](https://invisiblenetwork.ai/learn/nptel/112107213/14876b1148bb) (YouTube) 3. [Classification of Joining Processes](https://invisiblenetwork.ai/learn/nptel/112107213/cca92c8fe35b) (YouTube) 4. [Heat Generation in Welding](https://invisiblenetwork.ai/learn/nptel/112107213/7846b0410be7) (YouTube) 5. [Protection of Weld Metal](https://invisiblenetwork.ai/learn/nptel/112107213/5d147b5ad8bd) (YouTube) 6. [Principle of Fusion Welding Processes: Gas Welding](https://invisiblenetwork.ai/learn/nptel/112107213/e57e2b682dc1) (YouTube) 7. [Fundamentals of Welding](https://invisiblenetwork.ai/learn/nptel/112107213/a1cd5c31a7d1) (YouTube) 8. [Physics of Welding Arc](https://invisiblenetwork.ai/learn/nptel/112107213/181ab71b44e6) (YouTube) 9. [Shielded Metal Arc Welding](https://invisiblenetwork.ai/learn/nptel/112107213/c26044c5f73e) (YouTube) 10. [Gas Tungsten Arc Welding](https://invisiblenetwork.ai/learn/nptel/112107213/cd5962a3c08c) (YouTube) 11. [Newer variants of Gas tungsten arc welding](https://invisiblenetwork.ai/learn/nptel/112107213/761225e84bb7) (YouTube) 12. [Gas metal arc welding](https://invisiblenetwork.ai/learn/nptel/112107213/6714fa1e0c81) (YouTube) 13. [Submerged arc welding](https://invisiblenetwork.ai/learn/nptel/112107213/ee278882ad6c) (YouTube) 14. [Electro-slag and Electro-gas welding](https://invisiblenetwork.ai/learn/nptel/112107213/078b348703b3) (YouTube) 15. [Laser beam welding](https://invisiblenetwork.ai/learn/nptel/112107213/43c39e5d7860) (YouTube) 16. [Brazing](https://invisiblenetwork.ai/learn/nptel/112107213/f6be4819717d) (YouTube) 17. [Soldering and braze welding](https://invisiblenetwork.ai/learn/nptel/112107213/559b73a13b6b) (YouTube) 18. [Fundamentals of resistance welding](https://invisiblenetwork.ai/learn/nptel/112107213/ea1cbe064798) (YouTube) 19. [Resistance welding processes: spot and seam welding](https://invisiblenetwork.ai/learn/nptel/112107213/e6a7fad81dab) (YouTube) 20. [Flash butt welding](https://invisiblenetwork.ai/learn/nptel/112107213/0839c434de50) (YouTube) 21. [Adhesive joining](https://invisiblenetwork.ai/learn/nptel/112107213/ab534f636d20) (YouTube) 22. [Weld bonding](https://invisiblenetwork.ai/learn/nptel/112107213/2c62d4c43f2e) (YouTube) 23. [Solid state joining technologies: Fundamentals](https://invisiblenetwork.ai/learn/nptel/112107213/f4f0282571ef) (YouTube) 24. [Ultrasonic welding](https://invisiblenetwork.ai/learn/nptel/112107213/9243ea83810f) (YouTube) 25. [Diffusion welding](https://invisiblenetwork.ai/learn/nptel/112107213/ef5da77c6846) (YouTube) 26. [Explosive welding](https://invisiblenetwork.ai/learn/nptel/112107213/f51fed329f6d) (YouTube) 27. [Magnetic pulse welding](https://invisiblenetwork.ai/learn/nptel/112107213/dc669fa5245a) (YouTube) 28. [Weld thermal cycle](https://invisiblenetwork.ai/learn/nptel/112107213/c6bc8f60e66f) (YouTube) 29. [Heat affected zone and weld thermal cycle: I](https://invisiblenetwork.ai/learn/nptel/112107213/889bee293611) (YouTube) 30. [Heat affected zone and weld thermal cycle: II](https://invisiblenetwork.ai/learn/nptel/112107213/57473622ae2b) (YouTube) 31. [Solidification of weld metal](https://invisiblenetwork.ai/learn/nptel/112107213/a8239f1a6eb0) (YouTube) 32. [Metallurgical transformations in weld and heat affected zone of steels](https://invisiblenetwork.ai/learn/nptel/112107213/039c7900f204) (YouTube) 33. [Residual Stresses in Weld Joints](https://invisiblenetwork.ai/learn/nptel/112107213/bfaad9034147) (YouTube) 34. [Solidification cracking and their control](https://invisiblenetwork.ai/learn/nptel/112107213/4a2592f38fcd) (YouTube) 35. [Cracking of Welded Joints II: Cold Cracks](https://invisiblenetwork.ai/learn/nptel/112107213/5402ab0d2f02) (YouTube) 36. [Understanding Weldability: Introduction - I](https://invisiblenetwork.ai/learn/nptel/112107213/e60d650fc0a9) (YouTube) 37. [Understanding Weldability: Introduction - II](https://invisiblenetwork.ai/learn/nptel/112107213/991bedd30ae8) (YouTube) 38. [Metal Properties and Weldability - I](https://invisiblenetwork.ai/learn/nptel/112107213/16d664bd49c2) (YouTube) 39. [Metal Properties and Weldability - II](https://invisiblenetwork.ai/learn/nptel/112107213/b1e31208f3c8) (YouTube) 40. [Weldability of Work Hardenable Metals](https://invisiblenetwork.ai/learn/nptel/112107213/20bb05c74660) (YouTube) 41. [Weldability of Work Hardenable and Precipitation Strengthened Metals](https://invisiblenetwork.ai/learn/nptel/112107213/ed29fe27ffb8) (YouTube) 42. [Weldability of Precipitation Strengthened Metals](https://invisiblenetwork.ai/learn/nptel/112107213/5121d20f87b0) (YouTube) 43. [Weldability of Metals Strengthened by Grain Refinement, dispersion Hardening and Transformation Hardening](https://invisiblenetwork.ai/learn/nptel/112107213/af38e6613e8e) (YouTube) 44. [Weldability of Transformation Hardening Metals](https://invisiblenetwork.ai/learn/nptel/112107213/d181f3a30e67) (YouTube) 45. [Weldability of Metals: Combination of Strengthening Mechanisms](https://invisiblenetwork.ai/learn/nptel/112107213/ffc0dce5ead6) (YouTube) 46. [Weldability Consideration](https://invisiblenetwork.ai/learn/nptel/112107213/c76ab0e0a213) (YouTube) 47. [Weldability of Carbon and Alloy Steel - I](https://invisiblenetwork.ai/learn/nptel/112107213/e2e6230d92a6) (YouTube) 48. [Weldability of Carbon and Alloy Steel - II](https://invisiblenetwork.ai/learn/nptel/112107213/60b17862c64d) (YouTube) 49. [Weldability of Carbon and Alloy Steel - III](https://invisiblenetwork.ai/learn/nptel/112107213/c067fb33dfa7) (YouTube) 50. [Weldability of Low Carbon Steel and Mild Steel](https://invisiblenetwork.ai/learn/nptel/112107213/e6f9688cceb4) (YouTube) 51. [Weldability of Medium Carbon Steel and High Carbon Steel](https://invisiblenetwork.ai/learn/nptel/112107213/7f474056a1d4) (YouTube) 52. [Weldability of High Strength Low Alloy Steels](https://invisiblenetwork.ai/learn/nptel/112107213/ac4973204d3c) (YouTube) 53. [Weldability of HTLA Steel - I](https://invisiblenetwork.ai/learn/nptel/112107213/0cd27b479607) (YouTube) 54. [Weldability of HTLA Steel - II](https://invisiblenetwork.ai/learn/nptel/112107213/b42adb0a6c8e) (YouTube) 55. [Weldability of Cr-Mo Steel - I](https://invisiblenetwork.ai/learn/nptel/112107213/1b12aff618d1) (YouTube) 56. [Weldability of Cr-Mo Steel - II](https://invisiblenetwork.ai/learn/nptel/112107213/c9e95849987a) (YouTube) 57. [Weldability of Pre-coated Steel - I](https://invisiblenetwork.ai/learn/nptel/112107213/4289b7bb0284) (YouTube) 58. [Weldability of Pre-coated Steel - II](https://invisiblenetwork.ai/learn/nptel/112107213/fdaa763186d8) (YouTube) 59. [Weldability of Stainless Steel - I](https://invisiblenetwork.ai/learn/nptel/112107213/88d444244743) (YouTube) 60. [Weldability of Stainless Steel - II](https://invisiblenetwork.ai/learn/nptel/112107213/b49c90838715) (YouTube)