For laser welds in thick section steel, the main cause of solidification cracking is the weld profile shape. The high depth to width ratio of laser welds causes restraint and means that high thermal stress acts across the weld where the solidification fronts meet, causing centreline cracking.
Two days later they will participate in a Rose Ceremony as the final step in their graduation process. While a rose is symbolic for many things, the School of Nursingâs Jasmine Clark says it has become a traditional event at UBC and a time-honoured tradition.
Whether you're celebrating a cute little kindergartner in a cap and gown or congratulating someone on their college degree, graduation is a milestone that deserves some major kudos! With all the greeting cards available for any type of scholar, you'll have no problem finding just the right sentiment to celebrate the day.