|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||Investigations on Pb-free 6000 Series Aluminum Alloy for Machining Applications
||Saikat Adhikari, Anirban Giri, V Siva Raman, Pramod Koparde, Sachin Gupta, L Vijayaraghavan, S Sankaran
|On-Site Speaker (Planned)
Pb-based alloys such as AA6262, AA2011 and more recently AA6026 are used as free-machining aluminum alloys for automotive and electronic applications. However, in order to comply with Automotive End of Life Vehicles (ELV) and RoHS directives, Pb-based alloys slowly need to be phased out. A Pb-free machining grade 6xxx series aluminum alloy based on Sn was developed and its machinability evaluated. Microstructure analysis of the Al-Mg-Si-Sn-Cu alloy revealed the presence of low-melting (98 wt. %)Sn-Mg<SUB>2</SUB>Sn eutectic phases, which are responsible for providing good machinability. YS and UTS of the Pb-free alloy were comparable to those of the Pb-based AA6262 alloy. The effect of machining cutting speed, feed rate and depth of cut on surface roughness and chip size was evaluated. The machinability of the alloy was found to be superior to that of non-machining grade 6xxx alloys AA6061 and AA6082 and comparable to that of Pb-based free-machining alloy AA6262.
||Planned: Light Metals