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.
Roses will be available for sale before and at the graduation ceremony on May 7 at the Landers Center. The roses will be on pre-sale until May 4 and at the spring commencement ceremony the day of (cash only accepted at the graduation ceremony) for deserving graduates. Roses come in assorted colors (peach, pink, red, and yellow with red top) and can be purchased for $15 per half-dozen and $20 per dozen.