Enhanced grain refinement due to deformation-induced precipitation during ambient-temperature severe plastic deformation of an Al-7%Si alloy
MetadataShow full item record
An Al–7wt%Si alloy was prepared by casting. Billets from the as-cast ingot were annealed at 540 ◦C and then either quenched or furnace cooled to control the Si concentration in the primary Al constituent. Subsequently, as-cast billets as well as billets in the annealed conditions were subjected to ambient temperature severe plastic deformation (SPD) by equal-channel angular pressing (ECAP). Microstructures were evaluated by optical, scanning electron, and transmission electron microscopy methods and Vickers hardness data were also acquired. Grain reﬁnement and hardening in the primary Al by ambient temperature ECAP processing are inﬂuenced by deformation-induced precipitation of Si from a supersaturated solid solution. The ﬁnest grain size and highest hardness are associated with the greatest initial supersaturation of Si.
The article of record as published may be found at http://dx.doi.org/10.1016/j.jallcom.2008.11.047
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Bornschein, Arthur W.; Jernigan, Michael. (Monterey, California. Naval Postgraduate School, 1998);Within the United States Marine Corps, there exist billets (jobs) that require specialized graduate education. Department of Defense agencies submit requests to add billets to their organizational structure. Marine Corps ...
Production of ultra-fine grains and evolution of grain boundaries during severe plastic deformation of aluminum and its alloys Swisher, Douglas Lee (Monterey, California. Naval Postgraduate School, 2000);Equal channel-angular pressing (ECAP) is a recently developed method for deformation processing of material that can produce an ultra-fine grain structure in bulk material through severe plastic deformation. This study ...
Meyers, M.A.; Xu, Y.B.; Xue, Q.; Pérez-Prado, M.T.; McNelley, T.R. (Elsevier, 2003);Shear bands were generated under prescribed and controlled conditions in an AISI 304L stainless steel (Fe-18%Cr-8%Ni). Hat-shaped specimens were deformed in a Hopkinson bar at strain rates of ca 104 s-1 and shear strains ...