| Superplasticity in P/M Aluminum Alloys. (1998) | |||||||||
Abstract | |||||||||
| Recent advances in the technologies of powder metallurgy led to the development of some superplastic aluminum alloys containing a deliberate addition of large amounts of Zr and /or Cr and Mn and exhibiting the high strain rate superplasticity. For a few alloy systems, large elongation of more than 500% has been observed at strain rate 0.1/s, which is two or three orders of magnitude faster than that at which superplasticity is found in conventional aluminum alloys produced by ingot metallurgy. The high strain rate superplasticity was obtained in both fully static recrystallized and dynamic recrystallized P/M aluminum alloys. The decreasing of initial size of grains and /or sub-grains led to the increasing strain-rate for superplastic flow in both types of alloys. The refinement of grain or sub-grain size is necessary and important to obtain the high strain-rate superplasticity. | |||||||||
Publication details | |||||||||
| |||||||||