This content of this paper focuses on a general approach for Life-Cycle-Assessment for Blisk manufacturing. Formal LCAs are generally divided by international standards into four separate steps of analysis: the goal and scope definition, the acquisition of Life Cycle-Inventory, the Life-Cycle-Impact-Assessment and the interpretation.
Life-Cycle-Assessments enable an investigation of a products overall environmental impact and ecological footprint throughout its distinct life-cycle. Especially the central milling process requires a highly qualified process design to ensure a part of sufficient quality. The corresponding process chains consist of numerous different process steps starting with the initial raw material extraction and ending with the quality assurance (cradle to gate). In the high-pressure compressor segment of an engine, the material selection is limited to Titanium alloys such as Ti6Al4V and heat-resistant Nickel-alloys such as Inconel718. Their advantages during operation compared to conventional compressor rotors are met with a considerably complex manufacturing and production process. The increasing air traffic and the focus on a more sustainable industry as a whole lead to an extensive need for a more balanced assessment of a products life cycle especially on an ecological level.īlisks (or IBRs) remain a central component of every current and very possible every future aero engine configuration. On an international level, initiatives like the Green Recovery Plan promoted by the European Union set the basis towards a more environmentally friendly future approach for the aero-industry. Despite the current Covid-19 crisis, this trend is likely to resume in the near future. The aviation industry has been growing continuously over the past decades.
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