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.
Later Pruning. After the first major flush of blooms in spring, deadhead the Drift roses, removing the spent flower heads and cutting back the flowering stems by about one-third their length. That pruning promotes bushy new growth and repeat blooming. The procedure can be repeated after every flush of blooms.