Mechanical Performance and Fracture Behavior of Recycled AA6061-T6 Alloy Melted from Aluminium Chips

Aluminium chips were re-melted under the molten bath in a gas fired reverberatory furnace and superior quality recycled AA6061-T6 alloy was synthesized. The chips were added 5 to 20% by weight in the recycled alloy. The furnace charge included clean scrap of the same alloy (AA6061) along with the machining chips or tunings of mixed nature. The chips used in this study were mostly generated from lath/bore operations carried on homogenized billets. The fabricated alloy of each heat was characterized for microstructures, mechanical properties and fracture behavior. The results showed that the metallurgical and mechanical performance of the recycled alloy was comparable to the primary alloy. However, SEM analysis of the recycled alloy revealed a sizeable amount of Fe and Si containing intermetallic compounds such as AlFeSi, AlFeMg, and AlSiMg phases.

[1]  E. Olivetti,et al.  Improving aluminum recycling: A survey of sorting and impurity removal technologies , 2012 .

[2]  J. W. Kaczmar,et al.  Direct recycling of aluminium chips into extruded products , 1997 .

[3]  Lifeng Zhang,et al.  Removal of Inclusions from Aluminum Through Filtration , 2010 .

[4]  A. E. Tekkaya,et al.  Direct recycling of 1050 aluminum alloy scrap material mixed with 6060 aluminum alloy chips by hot extrusion , 2010 .

[5]  V. Kevorkijan.  Advances in recycling of wrought aluminium alloys for added value maximisation , 2010 .

[6]  Markus A. Reuter,et al.  Recycling of distributed aluminium turning scrap , 2002 .

[7]  A. Matuszak,et al.  New methods of aluminium and aluminium-alloy chips recycling , 2000 .

[8]  Jirang Cui,et al.  Recycling of automotive aluminum , 2010 .

[9]  U. M. J. Boin,et al.  Melting standardized aluminum scrap: A mass balance model for europe , 2005 .

[10]  M. Samuel,et al.  A new technique for recycling aluminium scrap , 2003 .

[11]  H. Amini Mashhadi,et al.  Recycling of aluminium alloy turning scrap via cold pressing and melting with salt flux , 2009 .

[12]  G. O. Verran,et al.  An experimental study of aluminum can recycling using fusion in induction furnace , 2008 .

[13]  Matthias Haase,et al.  Improving mechanical properties of chip-based aluminum extrudates by integrated extrusion and equal channel angular pressing (iECAP) , 2012 .

[14]  Varužan Kevorkjjan.  The recycling of standard quality wrought aluminum alloys from low-grade contaminated scrap , 2010 .

[15]  Anthony P. Reynolds,et al.  Production of wire via friction extrusion of aluminum alloy machining chips , 2010 .

[16]  M. Easton,et al.  Control and Removal of Impurities from Al Melts: A Review , 2011 .

[17]  Delfim Soares,et al.  Recycling of aluminium swarf by direct incorporation in aluminium melts , 2009 .

[18]  M. Schikorra,et al.  Hot profile extrusion of AA-6060 aluminum chips , 2009 .

[19]  Subodh K. Das.  Designing Aluminium Alloys for a Recycling Friendly World , 2006 .

[20]  Mohd Amri Lajis,et al.  A Sustainable Direct Recycling of Aluminum Chip (AA6061) in Hot Press Forging Employing Response Surface Methodology , 2015 .