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.
Gold Tassels for Graduate Honors. Graduation tassels are an essential component for any student commencement exercises. The tassel is worn by wrapping the upper loop around the button on a traditional graduation cap, and allowing the tassel to hang over the front left side of the cap.