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Mechanical strength of laser-welded cobalt-chromium alloy

✍ Scribed by Baba, N. ;Watanabe, I. ;Liu, J. ;Atsuta, M.

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
170 KB
Volume
69B
Category
Article
ISSN
0021-9304

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✦ Synopsis

Abstract

The purpose of this study was to investigate the effect of the output energy of laserwelding and welding methods on the joint strength of cobalt‐chromium (Co‐Cr) alloy. Twotypes of cast Co‐Cr plates were prepared, and transverse sections were made at the center ofthe plate. The cut surfaces were butted against one another, and the joints welded with alaser‐welding machine at several levels of output energy with the use of two methods. Thefracture force required to break specimens was determined by means of tensile testing. For the0.5‐mm‐thick specimens, the force required to break the 0.5‐mm laser‐welded specimens atcurrents of 270 and 300 A was not statistically different (p > 0.05) from the results for thenonwelded control specimens. The force required to break the 1.0‐mm specimens double‐weldedat a current of 270 A was the highest value among the 1.0‐mm laser‐welded specimens.The results suggested that laser welding under the appropriate conditions improved the jointstrength of cobalt‐ chromium alloy. © 2004 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 69B: 121–124, 2004

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