Heat affected zone in lugged vs. fillet brazing?

[gearcycler]

Check out this thread!

Welded joint failures and metallurgy

I finally got around to checking out that summary, the data presented from the Bontrager study is certainly interesting, but I have to say his write-up and conclusions following it is not very good. Not to mention the typos and wrong terminology used. [Screenshot 2023-01-25 192612] Based of of the chart he made (from Keith Bontrager’s data), we can see the initial hardness of the tubing, the annealing / softening at and near the weld, and then the return to the original hardness or close to …