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 degree ceremonies, graduands often dress in the academic dress of the degree they are about to be admitted to prior to the actual graduation ceremony. This is not the case at several of the older universities in the UK, most notably, Oxford, Cambridge and St Andrews which have their own distinct traditions.