This research was undertaken to study the way deformation behaves in ultrafine-grained (UFG)-conducting Al-Zr alloys doped with Sc, Hf, and Yb. All all, eight were studied zirconium partially replaced by and/or Doping elements (X = Zr, Yb) totaled 0.4 wt.%. The choice of doping conditioned possible precipitation Al3X particles L12 structure course annealing these alloys. Such provide higher the...

Much attention has been directed recently to ultra-grain refining of metallic materials, where the grain size is reduced to less than 1 mm. It is expected that submicrometer grained structure would result in high strength and toughness at ambient temperature [1] as well as high strain rate or low temperature superplasticity at elevated temperatures [2,3]. It has been reported recently that ultr...

The coarse-grained WE54 magnesium alloy was heat treated in order to have minimum hardness minimizing the effects of precipitates and solid solution. Friction stir processing (FSP) applied severe conditions obtain fine, equiaxed highly misoriented grains, with grain sizes even less than 1 µm. high severity demonstrated a strong impact microstructure. Consequently, processed materials exhibited ...

Cold-rolled Inconel 718 with δ phase dispersion distribution was prepared and exhibited excellent superplasticity at 950°C a strain rate of 6 × 10−4 ~4 10−3 s−1. The elongation to failure 561% obtained 1 Superplastic deformation accelerates the recrystallization cold-rolled deformed microstructure, thus improving grain uniformity. dispersed promotes nucleation recrystallized grains pin boundari...