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Mechanical strength of laser‐welded cobalt–chromium alloy
Author(s) -
Baba N.,
Watanabe I.,
Liu J.,
Atsuta M.
Publication year - 2004
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.10082
Subject(s) - welding , materials science , laser beam welding , alloy , chromium , ultimate tensile strength , metallurgy , laser , joint (building) , composite material , structural engineering , optics , engineering , physics
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