Thermomechanical treatment of 2124 PM aluminum alloys with low and high dispersoid levelsThe effects of thermomechanical treatment (TMT) on the mechanical properties and metallurgical structure of 2124 powder metallurgy aluminum alloys prepared from rapidly solidified powders were investigated. The alloys were prepared by using a standard canning/vacuum degassing/hot consolidation/extrusion sequence. Two compositions, with manganese contents of 0.5 and 1.5 percent, were investigated to examine the effects of low and high dispersoid levels. The results indicate that significant improvements in strength can be accomplished through TMT for this PM alloy system with little loss in toughness. The increase in strength observed is attributed to the presence of much finer, more homogeneous S-prime precipitation than that observed without TMT. Rolling deformation at room temperature resulted in some tendency for nonuniform (planar) deformation and resulted in slightly lower notch strength values. The lower notch strengths observed in the higher manganese composition were attributed to the coarser, more dense dispersoids observed in this material.
Document ID
19860062102
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sarkar, B. (NASA Langley Research Center Hampton, VA, United States)
Lisagor, W. B. (NASA Langley Research Center Hampton, VA, United States)