title: Effect of laser irradiation conditions on the laser welding strength of cobalt-chromium and gold alloys.
abstract: Using tensile tests, this study investigated differences in the welding strength of casts of cobalt-chromium and gold alloys resulting from changes in the voltage and pulse duration in order to clarify the optimum conditions of laser irradiation for achieving favorable welding strength. Laser irradiation was performed at voltages of 150 V and 170 V with pulse durations of 4, 8, and 12 ms. For cobalt-chromium and gold alloys, it was found that a good welding strength could be achieved using a voltage of 170 V, a pulse duration of 8 ms, and a spot diameter of 0.5 mm. However, when the power density was set higher than this, defects tended to occur, suggesting the need for care when establishing welding conditions.
authors.affiliation: Department of Dental Materials, Nihon University School of Dentistry, Tokyo, Japan. kikuchi-h@dent.nihon-u.ac.jp
authors.forename: Hisaji
authors.initials: H
authors.lastname: Kikuchi
authors.forename: Tomoko
authors.initials: T
authors.lastname: Kurotani
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kaketani
authors.forename: Hisako
authors.initials: H
authors.lastname: Hiraguchi
authors.forename: Hideharu
authors.initials: H
authors.lastname: Hirose
authors.forename: Takayuki
authors.initials: T
authors.lastname: Yoneyama
mesh_terms: D002858:Chromium Alloys; D003035:Cobalt; D003735:Dental Casting Technique; D003799:Dental Stress Analysis; D004560:Electricity; D006047:Gold Alloys; D007834:Lasers; D053844:Lasers, Solid-State; D008422:Materials Testing; D013718:Tensile Strength; D014896:Welding / Q000295:instrumentation*
chemical_list: D002858:Chromium Alloys; D006047:Gold Alloys; D003035:Cobalt