Available online at www.sciencedirect.com ScienceDirect Materials Today: Proceedings 5 (2018) 3250–3256 www.materialstoday.com/proceedings 2214-7853© 2017 Elsevier Ltd. All rights reserved. Selection and/or Peer-review under responsibility of 7th International Conference of Materials Processing and Characterization. ICMPC 2017 Experimental investigation on material removal rate and chip forms during turning T6 tempered Al 7075 alloy Diptikanta Das a, *, Barada Prasanna Sahoo a , Saras Bansal a , Prachi Mishra b a School of Mechanical Engineering, KIIT University, Bhubaneswar-751024, India b Institute of Technical Education and Research, Bhubaneswar-751030, India Abstract Influence of machining process parameters on material removal rate (MRR) and chip reduction coefficient (Z) was investigated and optimized individually during turning T6 tempered Al 7075 alloy with uncoated tungsten carbide inserts in dry environment. MRR increased with increasing any of the machining parameters; however, Z reduced with spindle speed and increased with depth of cut. Analysis of Variance (ANOVA) for both the responses was conducted at 95% confidence level and linear regression models were developed. Moreover, form of chips produced during each machining run was studied. © 2017 Elsevier Ltd. All rights reserved. Selection and/or Peer-review under responsibility of 7th International Conference of Materials Processing and Characterization. Keywords: Al 7075; Turning; Material removal rate; Chip reduction coefficient; Chips 1. Introduction Al 7075 is a Zn-Mg-Cu base aluminium alloy possessing high strength, moderate toughness and corrosion resistance. It is commonly used for structural applications in aircraft and aerospace industries. Previously copper based Al 2xxx series of alloys were the most common aerospace alloys, but they were susceptible to stress corrosion cracking. However, presence of chromium as an alloying element adds the benefit of stress-corrosion cracking resistance in Al 7075 and hence it is replacing the Al 2xxx series of alloys in many critical applications [1]. While producing thinner chips during high speed machining of Al 7075-T6 alloy, the chip flow angle and shear angle became high; but the thrust forces were low [2]. The life of polycrystalline diamond (PCD) tools was better * Corresponding author. Tel.: +91 674 6540805. E-mail address: dkdasfme@kiit.ac.in