B. Ahn*, S. R. Nutt 1. Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089-0241, USA *[email protected] Abstract: Al–Mg alloy powder was mechanically milled in liquid N2 (cryomilling) to produce thermally stable powder with nanocrystalline (NC) microstructure for the manufacture of highstrength alloys. A multi-scale microstructure w...

Microscale dynamic testing is vital to the understanding of material behavior at application relevant strain rates. However, despite two decades intense micromechanics research, microscale metals has been largely limited quasi-static Here we report compression pristine 3D printed copper micropillars rates from $\sim0.001$ s$^{-1}$ $\sim500$ s$^{-1}$. It was identified that microcrystalline defo...

austenitic stainless steels are extensively used in various applications requiring good corrosion resistance and formability. in the current study, the formation of nano/ ultrafine grained austenitic microstructure in a microalloyed aisi 304l stainless steel was investigated by the advanced thermomechanical process of reversion of strain-induced martensite. for this purpose, samples were subjec...

Abstract Constrained groove pressing (CGP) is one of the severe plastic deformation techniques for sheet metals to impose large strain and produce ultrafine-grained (UFG) structures without any change in dimensions. Cross route-constrained (Cross-CGP), an advanced version conventional CGP process, involves two cycles with equivalent 2.32 per cycle where square sample rotated by 90° after perfor...

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...

Materials with ultrafine grain sizes are attractive for use in micro-forming operations. High-pressure torsion (HPT) is an effective technique that allows disc materials subjected to torsional deformation to generate microstructures with significant grain refinement. Generally, ultrafine-grained materials exhibit high strength but their ductility is limited because they have both a low rate of ...

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...

Accumulative Roll-Bonding (ARB) is one of the more recently developed techniques capable of producing bulk ultra-fine grained (ufg) metals. There are still many aspects of the behavior of ufg metals that lacks an in-depth understanding, such as a generalized view of the factors that govern the cyclic deformation mechanism(s). This study aims to advance the understanding of the cyclic deformatio...