July 2, 2021
Conference Paper

Shear Assisted Processing and Extrusion of Aluminum Alloy 7075 Tubing at High Speed

Abstract

Conventional extrusion of aluminum alloy 7075 is limited to 1-2 meters per minute in order to avoid surface tearing and cracking. An emerging technique called Shear Assisted Processing and Extrusion (ShAPE) was used to extrude aluminum alloy 7075 tubing at a speed of 7.4 meters per minute without inducing surface defects. The faster extrusion speed is attributed to the unique flow characteristics inherent to the ShAPE process compared to conventional extrusion. Tubes with an inner diameter of 10 mm, outer diameter of 12 mm, and length of 2 meters were extruded at temperatures ranging from 340°C to 466°C. Tensile testing was performed per ASTM B557-15 with strain measured using digital image correlation. An ultimate tensile strength of 565 ± 4.6 MPa, yield strength of 496 ± 8.7 MPa, and elongation of 16.4 ± 1.0 % were measured for extrusion made at 362°C and heat treated to the T6 condition.

Published: July 2, 2021

Citation

Whalen S.A., M. Reza E Rabby, T. Wang, X. Ma, T.J. Roosendaal, and B.S. Taysom. 2021. Shear Assisted Processing and Extrusion of Aluminum Alloy 7075 Tubing at High Speed. In Light Metals held at the TMS Annual Meeting and Exhibition, March 15-18, 2021. Minerals, Metals and Materials Series, edited by L. Perander, 6, 277-280. Cham:Springer. PNNL-SA-156009. doi:10.1007/978-3-030-65396-5_41

Research topics

Solid Phase Processing