European Journal of Prosthodontics and Restorative Dentistry

cover art

Cover Date:
June 2010
Electronic ISSN:
0965-7452
Vol:
18
Issue:
2

Tensile Strength of Laser Welded Cobalt-Chromium Alloy With and Without an Argon Atmosphere

Abstract - The tensile strength and depth of weld of two cobalt chromium alloys before and after laser welding with and without an argon gas atmosphere were investigated. Using two cobalt chromium alloys, rod shaped specimens (5cm x 1.5 mm) were cast. Specimens were sand blasted, sectioned and welded with a pulsed Nd: YAG laser welding machine and tested in tension using an Instron universal testing machine. A statistically significant difference in tensile strength was observed between the two alloys. The tensile strength of specimens following laser welding was significantly less than the unwelded controls. Scanning electron microscopy showed that the micro-structure of the cast alloy was altered in the region of the weld. No statistically significant difference was found between specimens welded with or without an argon atmosphere.

KEY WORDS: Laser welding, Cobalt chromium alloy, Tensile testing

Article Price
£15.00
Institution Article Price
£
Page Start
60
Page End
65
Authors
Anna Tartari, Robert K.F. Clark, Andrzej S. Juszczyk, David R. Radford

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  1. Fabrication of a Fixed Provisional Implant Restoration A Report of Three Cases
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  1. Tensile Strength of Laser Welded Cobalt-Chromium Alloy With and Without an Argon Atmosphere
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  3. 65

  1. The Heat Emitted from Some Qth and Led Light Curing Units in Consecutive Activations A Laboratory Assessment
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  1. Marginal Behaviour of Self-etch Adhesive/composite and Combined Amalgam-composite Restorations
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  1. Three-Dimensional Positional Changes of Teeth Adjacent to Posterior Edentulous Spaces in Relation to Age at Time of Tooth Loss and Elapsed Time
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  1. Temperature Rise During Intraoral Polymerization of Self-Cured Hard Denture Base Liners
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  1. Book Reviews
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