@article{oai:mdu.repo.nii.ac.jp:00000586,
 author = {吉田, 貴光},
 issue = {2},
 journal = {松本歯学},
 month = {Aug},
 note = {application/pdf, Laser welding has been reported as a promising welding technique for joining titanium materials. However, since it is anticipated that titanium prostheses will become more popular in the near future, dissimilar-material laser welding of titanium materials should be evaluated and investigated. When titanium materials are fusion-welded to dissimilar materials, several problems mayoccur, including corrosion of the weldment and elemental-dissolution from the weldment, possibly causing deterioration of the original excellent properties of titanium materials. Furthermore, since laser welding for dissimilar joining with titanium materials has not been well established, poor penetration might take place. In the present study, the feasibility of laser welding of titanium materials to dental precious alloys was investigated. The study included bending strength, strain, hardness and elemental-dissolution of the dissimilar joints. The following results were obtained. 1. Bend strengths of similar weldments were lower than those obtained with base materials, except TI. 2. Distortion of similar weldments showed lower values than base materials. 3. Similar weldments of TI-TI exhibited a higher value of hardness, while other similar weldments showed lower hardness values than those obtained for base materials. 4. Dissimilar weldments of titanium showed lower bending strength and strain than did base materials. 5. Dissimilar Titanium weldments showed greater hardness than those obtained from the base materials. 6. SEM fractography of dissimilar joints revealed many porosities which appeared to be created during the welding procedure. Moreover, fractured surfaces indicated the presence of brittle materials at the dissimilar titanium joints. 7. The dissolution amount of Ti from dissimilar titanium joints in 1% lactic acid aqueous solution exhibited a higher value than that detected from base materials. 8. There were no statistically significant differences in bending strength before and after immersion in 1% lactic acid aqueous solution in both similar and dissimilar titanium joints. 9. Only TI-PT joints exhibited a lower value of strain after immersion in 1% lactic acid aqueous solution than the strain before the immersion.},
 pages = {170--188},
 title = {チタンと歯科用貴金属合金のレーザー溶接に関する研究},
 volume = {29},
 year = {2003}
}