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Girish P. Kelkar, Ph.D.

(562) 743-7576

WJM Technologies provides consulting and training services for all your material joining needs including metal welding/brazing/soldering, plastic welding, and ceramic brazing.

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WJM Technologies Services

WJM Technologies (Welding and Joining of Materials) provides end-to-end advisory services for all your metal, ceramic, and plastic joining needs.  Our welding consulting services include product evaluation, part design, material selection, process selection, process development, process optimization, and metallurgical analysis.  We deal with all commonly used processes including laser welding, resistance welding, arc welding (TIG, MIG, and plasma), ultrasonic welding, soldering, brazing, plastics welding, glass tube sealing, amongst other processes.  We also provide welding training (classroom and hands-on) for laser welding, resistance welding, arc welding, ultrasonic welding, welding metallurgy, and design of experiments.  Many of our customers use us for failure analysis with a metallurgical evaluation of the welds for cracks, porosities, and other issues.  Give us a call if you have any concerns with your weld or just a have a quick question.

Professional Experience

Dr. Kelkar has been involved with metal welding and ceramic joining since 1990 starting with a Ph.D. in ceramic brazing from Penn State University where he investigated brazing of alumina using active metal brazing alloys.  Active brazing alloys contain a small amount of Titanium that is able to reduce the ceramic and form a strong bond.  After graduation, he joined EWI (Edison Welding Institute, Columbus, OH) as a Sr. Research Engineer and acted as a welding consultant specializing in the field of microjoining including laser welding, resistance welding, ultrasonic welding, soldering, and brazing.  Microjoining is a specialized field where the fundamentals are the same as large-scale welding but the issues are unique in terms of material design and handling.  Following the stint at EWI, he worked as the CTO at Miyachi-Unitek and provided technical guidance and leadership for product development.  In 2002 he founded WJM Technologies, a welding consulting firm, to provide welding-related assistance to customers.  Since then he has acted as an independent welding consultant and worked with all types of manufacturing firms including medical, electronics, automotive, aerospace, and industrial.  A list of clients can be seen under the clients tab at the top of the page.  The type of projects include part design, process selection, process optimization, metallurgical analysis, and failure analysis.  In addition to being a welding consultant, he also provides welding training. All classes are conducted at the client's facility; additional details including pdf brochure are available by clicking on the training tab at the top of this page.