Heat source model for Keyhole mode and solid state welding — Lesson 3

This lesson covers the concept of heat source models in welding processes, focusing on keyhole mode laser welding and solid-state welding processes. It explains how heat source models can be developed for different welding processes, considering factors like geometric shape and heat flux distribution. The lesson also discusses the importance of estimating heat generation in friction stir welding (FSW) processes and the role of surface heat flux in solid-state welding processes. It further elaborates on the use of adaptive volumetric heat sources and hybrid heat source models in complex welding processes. The lesson provides a comprehensive understanding of how heat source models can be utilized in different welding scenarios.

Video Highlights

01:15 - Assumptions made in the formation of the keyhole in laser welding processes
09:57 - How to theoretically develop a heat source model for welding processes
37:04 - Different types of solid-state welding processes and how heat is generated in them
47:32 - Use of a tapered cylindrical tool profile in FSW processes

Key Takeaways

- Heat source models are crucial in understanding and controlling welding processes.
- In keyhole mode laser welding, heat source models can be developed considering arbitrary shapes of keyholes.
- In solid-state welding processes, surface heat flux is more predominant compared to volumetric heat.
- The development of heat source models relies on understanding the typical geometric shape and heat flux distribution.
- Adaptive volumetric heat sources and hybrid heat source models can be used in complex welding scenarios.