@article{oai:mdu.repo.nii.ac.jp:00000863, author = {山岸, 利夫 and 竹内, 勝泉 and 森, 厚二 and 横山, 宏太 and 伊藤, 充雄 and 孔, 泰寛 and 津村, 智信 and 丹羽, 健 and 出口, 敏雄 and 林, 春二 and 五十嵐, 順正}, issue = {2}, journal = {松本歯学}, month = {Aug}, note = {application/pdf, Until now, clinical applications in dentistry for the joining of pure titanium have not been able to be carried out. At long last, this has been accomplished by degrees. In this study fatigue properties for cast titanium samples laser welded were examined. Fatigue tests were carried out under bending from one direction on the cantilever. The main results obtained are as follows; Under repeated strain of 0.25mm, the welded samples never ruptured and showed greater resistance to repeated strain of 0.5mm. Under repeated strain of 0.5mm, the number of stress cycles to rupture was somewhat increased as the distance from fulcrum to welded portion increased. Furthermore, for the most part, the number of stress cycles for samples that did not rupture at the fulcrum point were greater than the number of stress cycles for ruptured fulcrum point samples. A brittle fracture image with a pattern like a shell shape was shown at the fractured surface. There wasn't a distinct difference between the shape of the welded fractured surface samples and unwelded fractured surface samples. It was considered that the distance between the laser welding portion and the fulcrum portion should be somewhat longer to create conditions for greater fatigue properties of laser welds for case of clinical application.}, pages = {131--136}, title = {レーザ溶接したチタン鋳造体の疲労特性について}, volume = {21}, year = {1995} }