Metallurgical effects on titanium by laser welding on dental stone

被引：13

作者：

Fujioka, S

Kakimoto, K

Inoue, T

Okazaki, J

Komasa, Y

机构：

[1] Osaka Dent Univ, Grad Sch Dent, Osaka 5731121, Japan

[2] Osaka Dent Univ, Dept Geriatr Dent, Osaka 5731121, Japan

来源：

DENTAL MATERIALS JOURNAL | 2003年 / 22卷 / 04期

关键词：

laser; welding; titanium;

D O I：

10.4012/dmj.22.581

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

It is not known for certain that dental stone components influence titanium welding. In this study, we investigated metallurgical problems caused by laser welding on dental stones using wrought commercial pure (CP) titanium. A pulsed Nd:YAG laser irradiated a number of specimens' surfaces which were fixed on either a dental hard stone or a titanium plate. The metallurgical properties of the weld were evaluated using the Vickers hardness test, microstructure observation, fractured surface observation and quantitative analysis of oxygen and hydrogen. In the weld formed on the dental stone there was an increase in hardness, the existence of an acicular structure and a brittle fractured surface, and an increase in the oxygen and hydrogen concentrations compared with base metal. In the weld formed on the titanium plate, these changes were not observed. Therefore, it was demonstrated that laser welding on dental stones made the welds brittle.

引用

页码：581 / 591

页数：11

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