|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Magnesium Technology 2017
||Scaled-Up Fabrication of Thin-Walled ZK60 Tubing using Shear Assisted Processing and Extrusion (ShAPE)
||Scott A. Whalen, Vineet Joshi, David Catalini, Curt Lavender, David Field
|On-Site Speaker (Planned)
Shear Assisted Processing and Extrusion (ShAPE) has been used to fabricate ZK60 magnesium tubing having a nominal diameter of 2.0” with wall thicknesses ranging from 0.06” to 0.120”. Application of simultaneous linear and rotational shear at the die face, and between the mandrel and die bearing, during the ShAPE process generates high shear within the flowing material. This combined effect results in significant grain refinement within the extrudate and an order of magnitude reduction in axial force compared to conventional extrusion techniques. An average grain diameter of less than 5 microns through the entire wall thickness and an axial force below 10,000 pounds were achieved. Crystallographic texture is reported showing rotation of the (0001) basal planes away from the longitudinal axis. Die design considerations unique to the ShAPE process such as bearing length, relief angle, and scrolled features are also discussed.