The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)
- Volume 38 Issue 2
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- Pages.200-213
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- 2000
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- 0301-2875(pISSN)
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- 2005-3789(eISSN)
TENSILE STRENGTH OF LASER WELDED-TITANIUM AND GOLD ALLOYS
티타늄과 금합금의 레이저 용접부의 인장강도
- Song, Yun-Gwan (Department of Prosthetics Dentistry, Institute of Oral Bioscience, College of Dentistry, Chonbuk National University) ;
- Ha, Il-Soo (Department of Prosthetics Dentistry, Institute of Oral Bioscience, College of Dentistry, Chonbuk National University) ;
- Song, Kwang-Yeob (Department of Prosthetics Dentistry, Institute of Oral Bioscience, College of Dentistry, Chonbuk National University)
- 송윤관 (전북대학교 치과대학 보철학교실, 구강생체과학 연구소) ;
- 송광엽 (전북대학교 치과대학 보철학교실, 구강생체과학 연구소) ;
- 하일수 (전북대학교 치과대학 보철학교실, 구강생체과학 연구소)
- Published : 2000.04.01
Abstract
Lasers have given dentistry a new rapid, economic, and accurate technique for metal joining. Although laser welding has been recommended as an accurate technique, there are some limitations with this technique. For example, the two joining surfaces must have a tight-fitting contact, which may be difficult to achieve in some situations. The tensile samples used for this study were made from a custom-made pure titanium and type III gold alloy plates. 27 of 33 specimens were sectioned perpendicular to their long axis with a carborundum disk and water coolant. Six specimens remained and served as the control group. A group of 6 specimens was posed as butt joints in custom parallel positioning device with a feeler gauge at each of three gaps : 0.00, 0.25. and 0.50mm. All specimens were then machined to produce a uniform cross-sectional dimension, none of the specimens was subjected to any subsequent form of heat treatment. Scanning electron microscopy was performed on representative tested specimens at fractured surfaces in both the parent metal and the weld. Vickers hardness was measured at the center of the welds with a micropenetrometer using a force of 300gm for 15 seconds. Measurement was made at approximately
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