Abstract:
Manufacturing activities consume a significant share of energy and natural resources and create some
irreversible environmental impacts leading to climate change. A recent report from IPCC has highlighted
the seriousness of global climate change. To mitigate the environmental burdens from manufacturing
activities, it is necessary to identify and visualize them. Tools based on life cycle assessment (LCA) method
have proven capabilities to visualize the hotspots during different stages of product life cycle and to
support decision-making. This paper presents friction stir processing (FSP) of pure magnesium for bio
implants and its environmental impact assessment in the Indian context. The study is aimed to visualize
the FSP of pure Mg and major hotspots in the process to improve sustainability. The primary data for the
inventory analysis was collected using real-time observations during each step of the process; whereas
for secondary data, product catalogs and reports were utilized. The analysis shows that the production
process of magnesium and energy used during electric discharge machining (EDM) have the highest
environmental impacts. Additionally, in magnesium production, the direct emissions generated due to
the burning of fossil fuel are the major contributors to these impacts. The steel used for FSP tool
production and brass wire used in EDM for sizing of the magnesium plates, are also found to be
contributing significantly toward water depletion potential. The study provides a conceptual approach
including possible technological interventions to improve the process sustainability. The study suggests
adopting advanced technologies of practical significance like ‘zinc coated cutting wires’ for improving the
environmental performance of the process.
