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.
At the end of AIT, he will have a âturning blueâ ceremony where he will receive his infantry cord along with graduation. Usually, there is a family day around the same time basic graduation would have been (around 9-10 week mark) but it depends on the class.