A Ductile UFG Al Alloy via Cryomilling and Quasi-Isostatic Forging
Mechanical milling of Al alloy powder in liquid nitrogen leads to a large reduction in the scale of the microstructure and results in material with high thermal stability and strength. However, it is important to consolidate the powder and achieve bulk material with sufficient toughness and ductility for structural applications. In this investigation, hot isostatic pressing, followed by quasiisostatic forging and hot rolling, were performed to fabricate Al 5083 plate with a predominantly ultra-fine grained microstructure. Plate produced in this way possessed enhanced tensile strength and ductility, exceeding that of conventionally processed material.
Deliang Zhang, Kim Pickering, Brian Gabbitas, Peng Cao, Alan Langdon, Rob Torrens and Johan Verbeek
A.P. Newbery et al., "A Ductile UFG Al Alloy via Cryomilling and Quasi-Isostatic Forging", Advanced Materials Research, Vols. 29-30, pp. 21-29, 2007