The influence of warm rolling parameters (temperature and reheating time between passes) on the superplastic response of Al-Mg alloys
Kuhnert, George J., Jr.
McNelley, Terry R.
MetadataShow full item record
The effects of rolling temperature and reheating interval between consecutive rolling passes on the superplastic response of two Al-Mg alloys were investigated. The alloys were Al-8%Mg-0 .1%Zr and Al-10%Mg-0 .1%Zr (wt. pct.). The effects of varying the process parameters were observed on resultant superplastic ductility during testing at 300°C. The data support a model for microstructure evolution during processing by a mechanism of continuous recrystallization (CRX). The model for CRX assumes that dislocations recover to sub boundaries which are stabilized by precipitates, of size on the order of one micron, located at nodes of the substructure. Continued recovery results in formation of boundaries of moderate misorientation, in the absence of the migration of a high angle boundary. The dependence of CRX on reheating time and rolling temperature was investigated and a strong dependence of subsequent superplastic response on these two processing parameters was observed. The influence of grain size on resultant superplasticity was also noted, indicating that the extent of grain refinement is limited to the spacing of particles.
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
The roles of strain and reheating interval in continuous recrystallization during the thermomechanical processing by warm rolling of an Al-Mg alloy Gorsuch, Thomas E. (Monterey, California. Naval Postgraduate School, 1989-12);Investigation into the influence of rolling strain and into the variation of properties and structure during reheating intervals between rolling passes in the thermomechanical processing of an Al-9.89Mg-0.09Zr alloy ...
Effect of heating rate to test temperature on superplastic response in an A1-8%Mg-1%Li-0.2%Zr alloy O'Mara, Duncan F. (Monterey, California. Naval Postgraduate School, 1989);The effect of heating rate to tension test temperature on superplastic response in an Al-8%Mg-1%Li-0.2% Zr alloy was studied. A thermomechanical process (TMP) was used that involved warm rolling with controlled reheating ...
Rogers, Stephen Andrew (Monterey, California. Naval Postgraduate School, 1992-09);The microstructural evolution related to the superplastic response of an AllOMg- O.lZr alloy during thermomechanical processing (TMP) was studied. The TMP had been accomplished in previous work and consisted of 12 rolling ...