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Effect of Lead Addition and Milling on Densification and Mechanical Properties of 6061 Aluminium Alloys

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Abstract

In the present work, one batch of prealloyed 6061Al powder was mixed with different lead compositions (5, 10, 15 vol.%) and another set with same composition was ball-milled for 5 h at 300 rpm. Microstructural features such as lattice constant, crystallite size, particle size and morphology were studied using XRD, particle size analyzer and SEM. Both the as-mixed as well as ball-milled powders were compacted at 300 MPa and sintered under N2 atmosphere for 1 h in tube furnace at 590 °C. The ball milling of 6061Al alloy powder improved sinter density and densification while lead addition showed negligible influence on these parameters. The microstructure of as-mixed 6061Al–Pb alloys exhibited equiaxial morphology whereas ball-milling resulted in elongated grains with uniform lead distribution. Quasi-static compressive mechanical behavior was investigated for 6061Al–Pb alloys at 1 × 10−3 s−1 strain rate. Results indicated that ultimate compressive and yield strength were sensitive to milling and lead volume fraction.

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Acknowledgements

The authors gratefully acknowledge the characterization facilities and the staff support received from the Advanced Center for Materials Science (ACMS) of Indian Institute of Technology, Kanpur.

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  1. Department of Materials Science and Engineering, Indian Institute of Technology, Kanpur, 208016, India

    Mahesh Paidpilli, Kapil Verma, Rajat Pandey & Anish Upadhyaya

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  1. Mahesh Paidpilli
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  2. Kapil Verma
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Correspondence to Mahesh Paidpilli.

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Paidpilli, M., Verma, K., Pandey, R. et al. Effect of Lead Addition and Milling on Densification and Mechanical Properties of 6061 Aluminium Alloys. Trans Indian Inst Met 70, 2017–2026 (2017). https://doi.org/10.1007/s12666-016-1024-3

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