Minnesota Chapter of ASM International

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April 28th ASM Trustee (Online)

Dr. Priti Wanjara is Principal Researcher and Manager at the National Research Council of Canada. She earned her Bachelor of Science in Engineering and Ph.D. degrees from McGill University in Metallurgical and Materials Engineering. Throughout her career, she has been concerned with the physical metallurgy of metals/alloys, and in particular with how this knowledge can be applied to welding process design for advanced manufacturing in the aerospace, automotive and power generation industries. Her work has emphasized the understanding of solidification and microstructural phenomena during welding of various aluminum-, magnesium-, iron-, zirconium, and nickel- and titanium-based materials. Her most significant research contributions include her pioneering work on electron beam additive manufacturing, linear friction welding and friction stir welding (FSW), which has accelerated fabrication and refurbishment improvements of various components for various small medium enterprises, original equipment manufacturers and maintenance repair and overhaul industries.

Abstract

“Wire-Fed Electron Beam Additive Manufacturing of Ti6Al4V”

The manufacturing technologies in industry are rapidly evolving into factories of the future with the advent of additive manufacturing technologies. Presently, the status-quo in research for metal additive manufacturing is centered on the fabrication of small parts with optimization performed for weight savings and performance using mainly laser powder-bed 3D printing technology. For the production of large parts, such as those that are likely to be used in aircraft engines, air frame structures or other large mechanical systems, the manufacturing approach entails migrating to higher deposition rate 3D printing. In this regard, wire-fed electron beam additive manufacturing (EBAM) is gaining momentum as an enabling technology for the fabrication of near net shape metallic components through a rapid layer by layer deposition process. Specific advantages of the EBAM process are the relatively large build envelop – that becomes infinite for in-space production – combined with the near 100% material efficiency of the wire-feed into the melt pool and high bulk material deposition rates of 200-600 mm3/s depending on feature size and material. Work on the EBAM process at the National Research Council of Canada (NRC) has strived to address the different underlying challenges presently facing the global scientific and research communities for introducing, producing and qualifying materials and structures fabricated through a hybrid additive-subtractive approach, as compared to a subtractive methodology. This presentations highlights the advancements in the EBAM technology for depositing titanium alloy Ti6Al4V. The presentation covers the characteristics of EBAM Ti6Al4V deposit in terms of the microstructure, residual stresses, distortion, microhardness, static tensile properties, low and high cycle fatigue properties under uniaxial loading, as well as high cycle vibration fatigue behavior. Fractographic analysis after tensile and fatigue testing, as well as fatigue crack path analysis point to the importance of the alpha-beta microstructural features in EBAM Ti6Al4V.

Register at www.mnasm.org by Tuesday, April 27th. A link to sign on to the online meeting platform will be sent to registrants on Tuesday, April 27th.



Attendees

Joel DeKock
Joel DeKockPreco, Inc.
Karen Bennett
Karen BennettAllied High Tech
Michael Bissen
Michael BissenAbbott
Ronald J. Parrington
Ronald J. ParringtonEngineering Systems
Lester Engel
Lester EngelEngel Metallurgical,
Farida Kasumzade
Farida KasumzadeMax Consulting Group
Shivram Sridhar
Shivram SridharMedtronic
Thomas Rohlader
Thomas RohladerUMN/3M
John Newman
John NewmanPhysical Electronics
Kyle (unconfirmed)
KylePolaris
AttendeeAttendee NameCompany Name