The role of particles in recrystallization of a thermomechanically processed A1-Mg alloy.

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 passes, with reheating between each pass, to a total strain of 2.5. Quantitative data including length, aspect ratio and area of precipitated 6-phase (Al8Mg5) particles were obtained using image analysis methods applied to the as-rolled conditions following passes 8, 10 and 12. The corresponding accumulated suains were 1.5, 2.0 and 2.6, respectively. Precipitation of the 6-phase is complete by pass 8 and the size as well as the size distribution remained essentially unchanged in the subsequent passes. A model for particle- stimulated nucleation of recrystallization, which is based on thermodynamic considerations, is evaluated with respect to experimental data.

Department dc:contributor.department

Mechanical Engineering

Grantor dc:publisher

Monterey, California. Naval Postgraduate School

Year dc:date.issued

1992

Author dc:creator

• Rogers, Stephen Andrew

Advisors dc:contributor.advisor

• McNelley, T.R.
• Crooks, Roy

Language dc:language.iso

en_US

Handle dc:identifier.uri

https://hdl.handle.net/10945/24029

OAI identifier oai:identifier

oai:calhoun.nps.edu:10945/24029