Ciscel D.,CalRAM, Inc.
Manufacturing Engineering | Year: 2014
The article describes how electron beam melting 3D printing process lets maintenance, repair, and overhaul (MRO) part-replacement problems take a powder in the aerospace industry. A cost-effective manufacturing technology is revolutionizing titanium parts manufacturing for the aerospace and defense industries. CaIRAM fabricates three-dimensional, near-net shape components by melting titanium powders one-layer at a time an electron beam. When compared to traditional manufacturing methods, the cost and time saving benefits that result from this additive process make it obvious why firms seek out this technology. Source
Porter J.,University of California at Santa Barbara |
Wooten J.,CalRAM, Inc. |
Harrysson O.,North Carolina State University |
Knowlson K.,North Carolina State University
Materials Science and Technology Conference and Exhibition 2011, MS and T'11 | Year: 2011
Gamma-TiAl (γ-TiAl) is a critical and very attractive material for use in high temperature applications because of its mechanical characteristics; however, it is difficult and expensive to fabricate by traditional manufacturing processes. A collaborative program was conducted to investigate the ability to fabricate near-net shaped γ-TiAl by electron beam melting (EBM) manufacturing. A team, led by UCI, developed the EBM process parameters for γ-TiAl and fabricated test pieces for evaluation. Microstructural and chemical analyses were performed on the test pieces to characterize the material and compare it to traditionally-fabricated γ-TiAl. Heat treatment experiments were performed and the resulting microstructure analyzed. Finally, geometrical shapes were produced and, using these processing parameters, prototype rotating parts were fabricated. This paper will review the work and show examples of the parts produced. Recommendations for follow on work will be shared. Copyright © 2011 MS&T'11®. Source
Agency: Department of Defense | Branch: Army | Program: SBIR | Phase: Phase II | Award Amount: 778.13K | Year: 2012
In 2010, CalRAM was awarded a Phase I SBIR to produce lightweight, low-cost precision seeker gimbals for high volume production that can operate in military aviation environments. Using an additive manufacturing technology based on electron beam melting (EBM), CalRAM built a near-net shape Ti-6Al-4V gimbal ring. In addition, a manufacturing cell capable of producing gimbal rings in quantities to support a production line was designed. For the Phase II program, CalRAM will work with Lockheed Martin to develop an EBM design and fabricate and test approximately 20 gimbal rings. A detailed design of the manufacturing cell will be developed along with work instructions for each work station. A manufacturing and quality plan for the production of the gimbal rings will be prepared and preproduction readiness review will be held to demonstrate the viability of the manufacturing approach. As part of this effort cost and schedule metrics will be developed to demonstrate the feasibility of meeting the cost target and delivery requirements.
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 149.66K | Year: 2015
ABSTRACT: This project will develop a methodology to assist Air Force Sustainment Centers (AFSC) sustainment engineers and procurement personnel to rapidly acquire certified parts using Additive Manufacturing (AM) technologies. AFSC are experiencing difficulty in supporting military hardware as many systems are beyond expected service life and require significant maintenance. The U.S. industrial base is shrinking and AFSC procurement offices have fewer options when placing orders to support these aging systems. AFSC buyers frequently wait a month for a quote after they have found a capable supplier. Fortunately AM technologies have the potential to ameliorate many of these problems. However, with any emerging technology, it is difficult to compare, contrast and apply the most appropriate technology for the fabrication of replacement components. As such, CalRAM will provide AFSC personnel the ability to quickly determine if a part is a candidate for an AM process, select the process, and place an order for a part. AM quotes can be generated in hours. The methodology will consist of a set of"Filters"that eliminate simple or common parts like nuts and bolts and focus on high payoff parts to be produced by the best value AM process. BENEFIT: A methodology will be established to rapidly screen candidate legacy parts for fabrication by Additive Manufacturing (AM). AM parts are capable of providing the same quality as conventionally fabricated parts, but with much reduced cost and schedule.
Agency: Department of Defense | Branch: Air Force | Program: SBIR | Phase: Phase I | Award Amount: 99.85K | Year: 2011
ABSTRACT: The designs of complex liquid rocket engine components are limited by the manufacturing processes used to build them. Traditional manufacturing processes, such as, casting or forging and machining, although capable of producing high-quality hardware, are expensive and time consuming. CalRAM, Inc. has been developing an additive manufacturing process, Electron Beam Melting (EBM) manufacturing, which can help the AFRL achieve IHPRPT"s goals. The layer-build process produces near-net shape components directly from a CAD file by melting powder with an electron beam and does NOT need tooling to manufacture"functional"hardware. The overall Phase I Objective is to demonstrate the feasibility and benefit of EBM manufacturing with respect to producibility (cost and quality), fabrication time and material properties to achieve IHPRPT goals. A shrouded titanium impeller will be EBM manufactured and spin tested to demonstrate the ability of the process to meet the IHPRPT goals. In addition, alternative materials will be explored and evaluated. BENEFIT: If the project is funded, there are four anticipated results from Phase I: 1. The successful spin test of a shrouded upper stage titanium impeller will show that EBM manufacturing can produce a complex structure capable of meeting the structural loads. In addition, the cryogenic behavior of EBM manufactured Ti will be confirmed to meet or exceed Ti-5Al-2.5Sn ELI properties. 2. Feasibility to produce EBM manufactured Alloy 625 with a uniform, dense microstructure and comparable mechanical properties to conventionally produced Alloy 625 will have been demonstrated. 3. Producibility, cost and schedule of an EBM manufactured titanium impeller that helps the AFRL meet Phase III IHPRPT goals will have been generated. 4. A path to scale up the EBM process to produce booster size components will have been laid out.