Deformation-processed metal-metal composites (DMMC) of Mg-Li alloys containing steel reinforcing fibers were prepared by infiltrating a preform of steel wool with the molten matrix. The Li content was varied to control the crystal structure of the matrix; Mg-4 wt pct Li is hexagonal close packed (hcp), while Mg-12 wt pct Li is body-centered cubic (bcc). The low carbon steel used as the reinforc...

A repeated thermomechanical treatment (RTMT) was adopted to control the microstructure of a glass-balloon-dispersed aluminum alloy (AC3A) composite. The RTMT, which involves the repetition of a multi-step process and followed by heat treatment, was applied to a cast plate of the composite. The composite was successfully worked into a rod or sheet by either swaging or flat rolling. The porous gl...

Severe plastic deformation (SPD) with strain significantly larger than one is effective to strengthen metals and alloys. However, such a method will not work for Mg alloys due their low deformability. In view of this problem, we propose new alloy strengthening scheme low-strain deformation, which introduce massive twins stacking faults in coarse grain interior by rotary swaging (RS) at room tem...

Abstract In this study, the influence of cold rotary swaging on microstructure and mechanical properties precipitation-strengthened nickel-based superalloy 718 (Alloy 718) was investigated. The initial stages work-hardening were characterized by means microhardness, electron backscatter diffraction (EBSD), X-ray (XRD) analyses. Furthermore, attention devoted to behavior at ambient elevated temp...