(DEPSCOR- RESEARCH COLLABORATION - FY21) A NOVEL SYNERGISTIC APPROACH OF COMBINING MULTISCALE DED PROCESSES FOR NEXT GENERATION HYBRID ADDITIVE MANUFACTURING
Abstract
We plan to investigate the competitions and correlations that exist between thermal gyrations, alloy composition, materials states, and the attending properties by using both a multi-feeder powder blown DED and a Wire Arc Additive Manufacturing (WAAM) system to produce hybrid manufactured components from duplex stainless steels (DSS) with self-similar microstructure (grain size, texture, phase fractions) and properties (tensile, hardness and toughness). The findings from this proposed investigation will play a crucial role in creating next-generation hybrid AM systems where two different DED routes can be employed to fabricate metal parts with targeted material properties. Preliminary studies will focus on understanding microstructure and key mechanical properties (tensile strength, low-temperature toughness, and hardness) of the DSS samples fabricated via aforesaid DED techniques. Controlled samples with optimized process parameters will be fabricated using a large-scale WAAM system. These fabricated parts will be used as a ‘base plate’ over which further layers will be deposited by varying (a) key elemental compositions (Fe, Cr, Ni, and Mo) of DSS using a six-powder feeder DED system and (b) process parameters (heat input, scanning speed and shielding gases). The ultimate goal will be to develop the knowledgebase necessary to tailor the processing parameters of both WAAM and laser DED so that a particular variable is uniformly achieved moving from one deposition to the other. The driving rationale for this fundamental problem is that if sufficient understanding and control exist to match the variables across the WAAMDED deposition interfaces, it will be possible to tailor both similarity as well as any arbitrary and desired difference for future hybrid AM systems. This is expected to have a significant impact on both the management of existing legacy systems as well as the design and production of future systems.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 20, 2023
- Source ID
- FA95502210385
Entities
People
- Sougata Roy
Organizations
- Air Force Office of Scientific Research
- Office of the Secretary of Defense