Life cycle assessment for the milling operation of titanium alloy (Ti6Al4V).
Daniyan, Ilesanmi Mpofu, Khumbulani Bello, Kazeem Muvunzi, Rumbidzai
Daniyan, Ilesanmi
Mpofu, Khumbulani
Bello, Kazeem
Muvunzi, Rumbidzai
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Abstract
There is a growing interest in titanium alloy for medical, aerospace, biomedical, automotive and rail applications due to its desirable properties such as its high strength to weight ratio and corrosion resistance ability. However, its low thermal conductivity can affect the energy consumption and rate of material removal thereby affecting the overall sustainability of the cutting operation. Hence, this study employs the Life Cycle Assessment (LCA) model for the investigation of the midpoint and endpoint characteristics of the milling operation of titanium alloy (Ti6Al4V) under the cooling and non-cooling conditions. The input and output of the milling process serve as the life cycle inventory. The Environmental Impact Assessment (EIA) was carried out with the aid of the Umberto NXT universal with database Eco-invent version 3.0. (CML 2001 and Impact 2002+ valuation standards). For the mid-point assessment, the results obtained indicate that the ozone layer depletion and global warming potential were the most significantly impacted potentials during the milling operation. However, the potential impacts were more significant under the cutting operation without cooling. The endpoint assessment for a cutting operation with cooling, contributes 15%, 12% and 9% to the global warming, eco system and human health toxicity respectively. The cutting operation without cooling contributes 18%, 16% and 9% to the global warming, eco system and human health toxicity respectively. This study provides an insight into the sustainability of titanium alloy during the milling process in terms of the energy requirements and environmental friendliness of the process.
Description
29th CIRP Life Cycle Engineering Conference.
Date
2022-01-01
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Publisher
Elsevier
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Keywords
EIA, Energy, Milling titanium alloy, Lifecycle assessment, Sustainability