EADS looks to EOS' direct metal laser sintering process to reduce material and energy use

EOS is working with EADS Group's research and technology production facility, EADS Innovation Works (IW), on the study that will see the development of a new range of manufacturing technologies that will integrate sustainability-relevant features into products and product manufacturing. Cyrille Peignot (pictured), sustainability engineer at EADS IW, said: "We shape the future of aerospace as a company, but in order to meet our responsibilities, we have to tackle current challenges such as access and availability of resources, as well as aircraft emissions. "EOS is one of our suppliers in the additive layer manufacturing (ALM) arena and its technology allows us to identify potential for internal savings. When combined with topology optimisation, ALM can deliver weight reduction and, consequently, reduced fuel consumption, but more importantly economise on the use of raw materials, frequently a significant cost to manufacturers. "So far, we have been able to redesign a part during the study process that meets our objectives, namely the use of fewer resources during the manufacturing process, while producing almost no waste; and a significant decrease in the energy bill. All of these are key factors to improve sustainability of an aircraft's performance and manufacture." The joint study by EOS and EADS IW will continue throughout the rest of the year and further, more detailed results will be made available towards the end of 2011. A previous study conducted by EADS IW showed that, although the use of energy during the manufacturing phase could not compare with conventional manufacturing processes, energy consumption dropped significantly during the in-service phase of aircraft components. Indeed, DMLS technology unlocks structural optimisation, leading to weight reduction of the components and thus to a lowering of fuel and carbon dioxide emissions. In parallel, EOS carried out a product carbon footprint calculation of one kilogram of sintered material. The findings supported EADS IW's research, as they showed that the greatest impact on reducing carbon dioxide emissions and energy consumption was to be found during the in-service phase of laser-sintered components. It further identified the most important drivers of energy consumption along the B2B value chain, particularly around the supply of raw materials and the use of cooling systems. It was while comparing data that EADS IW and EOS agreed to carry out a collaborative environmental study. Technologies applied to aerospace normally have to go through a nine-step process called TRL (technology readiness level) before a technology proceeds through qualification. For each TRL review, the evolution in maturity of a technology is measured in terms of performance, engineering, manufacturing, operational readiness, value and risk, and sustainability/environment. The latter is a new criterion linked to EADS Group's eco-efficiency vision, and a joint study focusing on this criterion made perfect sense. Following the original study, EADS IW and EOS will now complete a full life cycle assessment covering energy consumption, material use, carbon dioxide emissions and use of hazardous material, benchmarking an optimised design for use with EOS' next generation platform, the EOSINT M 280 metal system. Results should show improvements in the sustainable performances, not only of the component, but also its manufacture.