Neo T K, Chai J, Gilbert J L, Wozniak W T, Engelman M J
Northwestern University Dental School, Chicago, Illinois 60611, USA.
Int J Prosthodont. 1996 Jul-Aug;9(4):379-93.
The tensile mechanical properties of welded titanium joints were studied, and intact titanium was used as controls. Welded joints were fabricated with either a stereographic laser-welding technique or a gas tungsten arc welding technique. The effect of heat treatment following a simulated porcelain application was also investigated. Heat-treated laser welds had significantly lower ultimate tensile strengths. Heat treatment had no effect on the modulus of elasticity or elongation, but generally significantly decreased the yield strength of the titanium specimens. The gas tungsten are welding specimens had significantly higher yield strengths and elastic moduli than the other two groups. The elongation of the control specimens was significantly greater than the elongation of the gas tungsten arc welding specimens, which was in turn significantly higher than that of the laser-welded specimens.
研究了焊接钛接头的拉伸力学性能，并以完整的钛作为对照。采用立体激光焊接技术或钨极气体保护电弧焊技术制作焊接接头。还研究了模拟烤瓷应用后热处理的影响。经过热处理的激光焊缝的极限抗拉强度显著降低。热处理对弹性模量或伸长率没有影响，但通常会显著降低钛试件的屈服强度。钨极气体保护电弧焊试件的屈服强度和弹性模量明显高于其他两组。对照试件的伸长率明显大于钨极气体保护电弧焊试件的伸长率，而钨极气体保护电弧焊试件的伸长率又明显高于激光焊接试件。
