Tensile strength of laser welded cobalt-chromium alloy with and without an argon atmosphere

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 (5 cm x 1.5 mm) were cast. Specimens were sand blasted, sectioned and welded with a p...

Full description

Saved in:

Bibliographic Details
Published in:	The European journal of prosthodontics and restorative dentistry Vol. 18; no. 2; p. 60
Main Authors:	Tartari, Anna, Clark, Robert K F, Juszczyk, Andrzej S, Radford, David R
Format:	Journal Article
Language:	English
Published:	England 01-06-2010
Subjects:	Argon Chromium Alloys - chemistry Cobalt Dental Casting Technique Dental Soldering - instrumentation Dental Stress Analysis Denture Design Lasers, Solid-State Materials Testing Tensile Strength Welding - instrumentation
Online Access:	Get more information
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	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 (5 cm 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.
ISSN:	0965-7452
DOI:	10.1922/EJPRD_84606