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.
For the famous Tournament of Roses Parade in Pasadena, the parade rules require that all decorations must be some part of a living plant. The emphasis, of course, is on roses and other flowers, but seeds, petals, bark, leaves, fibers, stems, vegetables, nuts, and almost any other part of a plant are also used.