Sustainability Analysis of Friction Stir Welding of AA5754 Sheets

Abstract The environmental impact of friction stir welding process vs. welding parameters was evaluated and analysed in detail. To this purpose, butt joints in AA5754 aluminum alloy sheets were obtained at different rotational and welding speeds. All input and output data, in terms of materials, energies and emissions, were collected and analyzed using a life cycle assessment software in order to evaluate the environmental impact index. Sound weld was used as functional unit and all energy and material flows were based on it. The results given by the life cycle assessment analysis has shown that the environmental impact of friction stir welding is strongly affected by rotational and welding speeds. The environmental impact was also related to the mechanical properties of joints, expressed as ultimate tensile strength and ultimate elongation.

[1]  Gerald Rebitzer,et al.  IMPACT 2002+: A new life cycle impact assessment methodology , 2003 .

[2]  Maurizio Bevilacqua,et al.  Design for environment as a tool for the development of a sustainable supply chain , 2008 .

[3]  Michela Simoncini,et al.  Effect of the welding parameters and tool configuration on micro- and macro-mechanical properties of similar and dissimilar FSWed joints in AA5754 and AZ31 thin sheets , 2012 .

[4]  Experimental and Numerical Analysis on FSWed Magnesium Alloy Thin Sheets Obtained Using “Pin” and “Pinless” Tool , 2012 .

[5]  Stefan Seuring,et al.  A review of modeling approaches for sustainable supply chain management , 2013, Decis. Support Syst..

[6]  M. Goedkoop,et al.  The Eco-indicator 99, A damage oriented method for Life Cycle Impact Assessment , 1999 .

[7]  Rajiv S. Mishra,et al.  Friction Stir Welding and Processing , 2007 .

[8]  A. Forcellese,et al.  Mechanical properties and microstructure of joints in AZ31 thin sheets obtained by FSW using “pin” and “pinless” tool configurations , 2012 .

[9]  T. Gutowski,et al.  Environmentally benign manufacturing: Observations from Japan, Europe and the United States , 2005 .

[10]  Maurizio Bevilacqua,et al.  Environmental analysis of a cotton yarn supply chain , 2014 .

[11]  Amber Shrivastava,et al.  Comparison of energy consumption and environmental impact of friction stir welding and gas metal arc welding for aluminum , 2015 .

[12]  Wim Dewulf,et al.  Unit process impact assessment for discrete part manufacturing: A state of the art , 2010 .

[13]  V. Balasubramanian,et al.  Effect of welding processes on tensile properties of AA6061 aluminium alloy joints , 2009 .

[14]  A. Forcellese,et al.  Mechanical properties and microstructure of joints in AZ31 thin sheets obtained by friction stir welding using “pin” and “pinless” tool configurations , 2012 .

[15]  A. Forcellese,et al.  Plastic flow behaviour and formability of friction stir welded joints in AZ31 thin sheets obtained using the “pinless” tool configuration , 2012 .