Formation of a fusion weld nugget is compared to a pressure cooker and how it retains the contents safely inside. The weld nugget discusses the nuances of the process.
Joint quality is affected by changes in the weld/solder/braze during cooling. The weld nugget discusses the nuances of metallurgical and mechanical characteristics during cooling.
Weld solidification is very similar to metal casting. This nugget discusses the similarities and differences between the two processes and how one can use that information to understand issues and defects in welding.