Processing of Al-Cu-Mg Alloy (V65 Grade) Bars as Feedstock for Wire Drawing

Abstract:

Al-Cu-Mg (Russian grade V65) alloys are used for riveting applications in aerospace industries due to relatively high shear strength of the order of 25 kg/mm² combined with a high plasticity. The main advantage of using V65 aluminum alloy for rivet application comes from its significantly slower natural aging response, which gives flexibility to carryout riveting operation even after 4 days after solution heat treatment and natural aging at room temperature. This very valuable feature is not found in its counterpart alloy AA2024 where due to rapid aging kinetics of this alloy, the riveting operation must be completed within 30 min of the solution treatment, which is many times impractical. This paper presents the processing of V65 aluminium alloy by Direct Chill (DC) casting followed by subsequent secondary processing through extrusion and forging to realize feedstock for caliber rolling. These ingots were caliber rolled to 12 mm diameter rods at different temperatures and mechanical properties were evaluated in T6 and T4 tempers. Detailed microstructural examination using optical microscopy and fractography of the tensile tested samples using scanning electron microscopy were carriedout to correlate microstructure and mechanical properties.

• Periodical: Materials Science Forum (Volume 710)
• Pages: 167-173
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.710.167
• Online since: January 2012
• Authors: Niraj Nayan, S.V.S. Narayana Murty, Abhay Kumar Jha, S.C. Sharma, K. Sreekumar, Parameshwar Prasad Sinha
• Keywords: Homogenization, Multipass Rolling, Rivets, V65 Aluminium Alloy

References

[1] A.K. Jha, K. Sreekumar and P.P. Sinha, J. Fail. Anal. And Prven

DOI: 10.1007/s11668-010-9424-x

[2] Aluminium: Properties and Physical Metallurgy, edited by John E hatch, American Society of metals, Metals Park , Ohio, 1983 p.177.

[3] Ian Polmear, Light Alloys, fourth Edition- 2006, Elsevier, p.42.