The successful joining of dissimilar metal tubes would enable the selective use of the unique properties exhibited by biocompatible materials such as stainless steel and shape memory materials, such as NiTi, to locally tailor the properties of implantable medical devices. The lack of robust joining processes for the dissimilar metal pairs found within these devices, however, is an obstacle to their development and manufacture. Traditional joining methods suffer from weak joints due to the formation of brittle intermetallics or use filler materials that are unsuitable for use within the human body. This study investigates a new process, Laser Autogenous Brazing, that utilizes a thermal accumulation mechanism to form joints between dissimilar metals without filler materials. This process has been shown to produce robust joints between wire specimens but requires additional considerations when applied to tubular parts. The strength, composition, and microstructure of the resultant joints between NiTi and stainless steel are investigated and the effects of laser parameters on the thermal profile and joining mechanism are studied through experiments and numerical simulations.
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April 2017
Research-Article
Laser Autogenous Brazing of Biocompatible, Dissimilar Metals in Tubular Geometries
Gen Satoh
,
Gen Satoh
Department of Mechanical Engineering,
Columbia University,
New York, NY 10023
e-mail: gs2385@columbia.edu
Columbia University,
New York, NY 10023
e-mail: gs2385@columbia.edu
Search for other works by this author on:
Grant Brandal
,
Grant Brandal
Department of Mechanical Engineering,
Columbia University,
500 West 120th Street,
Mudd Rm 220,
New York, NY 10023
e-mail: gbb2114@columbia.edu
Columbia University,
500 West 120th Street,
Mudd Rm 220,
New York, NY 10023
e-mail: gbb2114@columbia.edu
Search for other works by this author on:
Y. Lawrence Yao
Y. Lawrence Yao
Fellow ASME
Department of Mechanical Engineering,
Columbia University,
New York, NY 10023
e-mail: yly1@columbia.edu
Department of Mechanical Engineering,
Columbia University,
New York, NY 10023
e-mail: yly1@columbia.edu
Search for other works by this author on:
Gen Satoh
Department of Mechanical Engineering,
Columbia University,
New York, NY 10023
e-mail: gs2385@columbia.edu
Columbia University,
New York, NY 10023
e-mail: gs2385@columbia.edu
Grant Brandal
Department of Mechanical Engineering,
Columbia University,
500 West 120th Street,
Mudd Rm 220,
New York, NY 10023
e-mail: gbb2114@columbia.edu
Columbia University,
500 West 120th Street,
Mudd Rm 220,
New York, NY 10023
e-mail: gbb2114@columbia.edu
Syed Naveed
Y. Lawrence Yao
Fellow ASME
Department of Mechanical Engineering,
Columbia University,
New York, NY 10023
e-mail: yly1@columbia.edu
Department of Mechanical Engineering,
Columbia University,
New York, NY 10023
e-mail: yly1@columbia.edu
Manuscript received December 3, 2015; final manuscript received October 10, 2016; published online November 10, 2016. Assoc. Editor: Hongqiang Chen.
1Corresponding author.
J. Manuf. Sci. Eng. Apr 2017, 139(4): 041016 (14 pages)
Published Online: November 10, 2016
Article history
Received:
December 3, 2015
Revised:
October 10, 2016
Citation
Satoh, G., Brandal, G., Naveed, S., and Lawrence Yao, Y. (November 10, 2016). "Laser Autogenous Brazing of Biocompatible, Dissimilar Metals in Tubular Geometries." ASME. J. Manuf. Sci. Eng. April 2017; 139(4): 041016. https://doi.org/10.1115/1.4035034
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