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...

Al 5083 alloy powder was mechanically milled in liquid nitrogen to achieve a nanocrystalline (NC) structure having an average grain size of 50 nm with high thermal stability, and then consolidated by quasi-isostatic (QI) forging. The consolidation resulted in ultrafine grains (UFG) of about 250 nm, and the bulk material exhibited enhanced strength compared to conventionally processed Al 5083. T...

Effect of strain energy on corrosion behavior ultrafine-grained (UFG) copper prepared by severe plastic deformation (SPD) was investigated in terms microstructural evolution. The SPD processed material showed an structure after grain refinement for several time processes, which will affect mechanical and Homogeneity can be obtained efficiently through the pressing process commonly known as simp...

The trade-off between transformation-induced plasticity (TRIP) strengthening and the intrinsically brittle nature of deformation-induced ??-martensite (DIM) has been a long-standing dilemma in optimizing strength–toughness synergy austenitic steels. This limited their potential use, particularly energy absorption applications. Here, we propose new strategy to minimize negative effect without li...

Abstract. The increasing share and expansion of miniature devices requires the mastery parts production, including metal parts. In microforming, due to conditions mechanical similarity, aim is use materials with smallest grain. Ultra-fine-grained metals (UFG) fulfill this requirement. These can be obtained, inter alia, in SPD processes such as ECAP. work uses extension based on ECAP additional ...

Microstructure evolutions and mechanical properties of a commercially pure titanium (CP-Ti, grade 2) during multi-pass rotary-die equal-channel angular pressing (RD-ECAP) and cold rolling (CR) were systematically investigated in this work, to achieve comprehensive property for faster industrial applications. The obtained results showed that the grain size of CP-Ti decreased from 80 μm of as-rec...

Ultrafi ne grained (UFG) and nanocrystalline (NC) metals, unlike coarse-grained metals, often show inelastic strain recovery during unloading, which is referred to as early Bauschinger effect. Several experimental and simulation studies have focused on the microscopic origins of this unusual mechanical behavior. However, the strain rate dependence of early Bauschinger effect in UFG and NC metal...

A special mechanism/mode of plastic deformation occurring through stress-driven rotations of low-angle grain boundaries (GBs) near crack tips in nanocrystalline and ultrafinegrained (UFG) materials is theoretically described. It is demonstrated that such rotations of GBs represent energetically favorable processes in wide ranges of parameters characterizing precracked specimens with nanocrystal...

Due to their unique properties, titanium (Ti) and Ti-alloys are particularly suitable for biomedical devices. Ti has a high specific strength low Young’s modulus (reducing stress shielding), corrosion resistance, superior biocompatibility. However, Ti’s moderately (100–110 GPa) is still considerably higher than bones (5–30 GPa). The β-Ti phase, whose elastic closer the bone, can be kept by incr...

Metastable austenitic steels having ultrafine grained (UFG) microstructures can be fabricated by conventional cold rolling and annealing processes utilizing the deformation-induced martensitic transformation during its reverse to austenite upon annealing. However, such are not applicable when has high mechanical stability against transformation, since there is no sufficient amount of martensite...