Sjögren G, Andersson M, Bergman M
Department of Dental Materials and Technology, Faculty of Odontology, University of Umeå, Sweden.
Acta Odontol Scand. 1988 Aug;46(4):247-53. doi: 10.3109/00016358809004774.
Unalloyed titanium of the quality used for osseointegrated implants by the method of Brånemark is also sometimes used for the metallic part of the prosthetic superstructure placed on the fixtures and for crowns and bridges of conventional type. Forty bars of titanium, 8 of ASTM B 348 grade-1 quality and 32 of ASTM B 348 grade-2 quality, were laser-welded, using dissimilar laser joint variables. Tensile strength, 0.2% proof stress, and percentage elongation of the welded bars were measured and compared with the corresponding values for the titanium bars as delivered and with those of brazed type-3 gold alloy bars of similar dimensions. The type of fracture was evaluated from fractographs. The results showed that the use of certain defined laser joint variables during welding produced values for the mechanical properties studied which were more favorable than those obtained from the brazed gold bars. The fracture of the titanium specimens was ductile, with dimples occurring at the fracture surfaces.
采用布兰内马克方法用于骨结合植入物的优质纯钛，有时也用于放置在种植体上的修复上部结构的金属部分以及传统类型的冠和桥。四十根钛棒，8根符合ASTM B 348一级质量标准，32根符合ASTM B 348二级质量标准，使用不同的激光焊接变量进行激光焊接。测量了焊接棒的抗拉强度、0.2% 屈服强度和伸长率，并与交付时钛棒的相应值以及尺寸相似的钎焊3型金合金棒的相应值进行比较。从断口金相照片评估断裂类型。结果表明，焊接过程中使用某些特定的激光焊接变量所得到的研究机械性能值，比钎焊金条得到的性能值更有利。钛试样的断裂是韧性的，断口表面出现凹坑。
