Archana Sharma, Speaker at Materials Science and Engineering Events
Bhabha Atomic Research Centre, India
Title : Joining of high strength alloys and dissimilar materials using Magnetic Pulse Welding Technique

Abstract:

High strength alloys of Ti, Al, SS and dissimilar materials joining are required to meet new challenges for light weight, structural reinforcement and other functional requirements. Innovative solutions had led to the combinations of metallic assemblies with different melting temperatures. Conventional fusion welding process show difficulties in joining these metal combinations at interface due to different melting temperature. The exploration of new joining techniques led to high velocity impact welding methods, which enable welding of high strength alloys and dissimilar materials. The high velocity impact welding involves a strong interfacial collision in various high velocity impact methods using the explosive detonation (explosive welding), the laser shock impulse (laser spot welding), the magnetic impulse (magnetic pulse welding), and the vaporizing foil actuation (vaporizing foil actuation welding). High pressure, short duration and low temperature bonding form the main particular characteristic of these joining methods.

In Magnetic Pulse welding (MPW) technology the work piece is welded by fast rising, high intensity pulse magnetic field that induce a current in the work piece and the corresponding magnetic field, rapidly accelerating portions of the work piece. The work piece can be welded without any contact from a tool. It can be considered as one of the best high-rate welding methods from the several aspects such as high cleanness, cost-efficiency and productivity. The main components of MPW systems are capacitor bank, capacitor charging supply, energy transfer switch, welding coil and the work piece. The capacitor bank is used for storing and discharging the electrical energy to the welding coil. MPW systems and coil are designed and fabricated for welding of high strength SS alloys and dissimilar metals (Ti-SS, Al-SS and SS alloys). The MPW system details, Coils and magnetic pulse welding of high strength SS alloys, dissimilar metals (Ti-SS, Al-SS) and the weld characterization for nuclear applications will be presented in the conference.

What will audience learn from your presentation?

  • Latest results on dissimilar material welding (Ti-SS, Al-SS and SS alloys) using magnetic pulse welding.
  • Dissimilar materials weld interface studies.
  • Systems and tool for magnetic pulse welding for industrial applications.
  • Advantages and challenges in magnetic pulse welding technology.

Biography:

Dr. Archana Sharma is Director, Beam technology Development Group in Bhabha Atomic Research Centre, Mumbai, INDIA. She has been selected in top 75 woman professional in 2022 by Government of India and British High Commission declared by Principle Scientific Adviser, on March 3,2022. She has received the B.E degree in electrical engineering from Regional Engineering College, Bhopal, India, in 1987, the M.Sc. (Eng.) and the Ph.D. degrees from the Indian Institute of Science (IISc), Bangalore. India, in 1994 and 2002. She has over 100 scientific publicationsin referred journals. Dr. Sharma is a fellow of the Indian National Academy (FNAE), the Institute of Engineering and Technology (FIET), and the Institute of Engineers (FIE). She is the recipient of prestigious Homi Bhabha Science and Technology Excellence Award and three group achievements awards. She has transferred 12 indigenous technologies from her group in BARC to industry for commercialization. She is recognized guide of Mumbai University and Homi Bhabha National Institute (HBNI),Mumbai.

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