The influence of the strain rate on plasticization effect (PE) ultrafine-grained (UFG) Al-1.47Cu-0.34Zr (wt%) alloy structured by high pressure torsion. A significant increase in plasticity (more than 2 times) while maintaining a level strength (ultimate tensile ~465 MPa) UFG was achieved as result additional deformation-heat treatment (DHT), consisting low-temperature annealing and small defor...

This paper reported the results of research into effect Equal Channel Angular Pressing (ECAP) temperature and 1-h annealing on mechanical properties, stress-relaxation resistance, corrosion resistance austenitic steel AISI 321L with strongly elongated thin δ-ferrite particles in its microstructure. The formation α′-martensite fragmentation austenite grains takes place during ECAP. Ultrafine-gra...

In the present study, various literature based on high strain rate behaviour of ultrafine-grained (UFG) aluminium alloys produced through severe plastic deformation techniques have been discussed. It was observed from that under (3000–120000 s−1) adiabatic shear bands (ASBs) were formed which is main reason for dynamic failure. These ASBs failure Al when they exposed to impact. The are mainly t...

High-resolution electron backscatter diffraction (EBSD) was used to examine the grain structure in long rods of ultrafine-grain (UFG) commercial-purity titanium produced for medical implants. The UFG material was obtained by equal channel angular pressing (ECAP) using a Conform scheme followed by rod drawing. The microstructure was found to be bimodal consisting of relatively coarse elongated g...

Abstract. The thermal stability of ultrafine-grained metals can be fully understood when observing time-resolved microstructural changes over multiple-length scales. global relaxation behavior upon heating an (UFG) CoCrFeNi high-entropy alloy (HEA) was characterized by in-situ neutron diffraction measurements. Before heating, the nanocrystalline microstructure introduced applying high-pressure ...

The present work was undertaken to improve superplastic ductility of friction-stir welded joints ultrafine-grained (UFG) Al–Mg–Sc–Zr alloy. In order suppress the undesirable abnormal grain growth, which typically occurs in heavily deformed base material, UFG material produced at elevated temperature. It suggested that new processing route could reduce dislocation density structure and thus enha...

Abstract Metals with a bimodal grain size distribution have been found to both high strength and good ductility. However, the coordinated deformation mechanisms underneath ultrafine-grains (UFGs) coarse grains (CGs) still remain undiscovered yet. In present work, Cu 80% volume fraction of recrystallized micro-grains was prepared by annealing equal-channel angular pressing (ECAP) processed ultra...

To solve the main problems of existing coarse grained copper (CG Cu) intrauterine devices (IUD)-namely burst release and a low transfer efficiency of the cupric ions during usage-ultra-fine grained copper (UFG Cu) and single crystal copper (SC Cu) have been investigated as potential substitutes. Their corrosion properties with CG Cu as a control have been studied in simulated uterine fluid (SUF...

As a kind of cost-efficient hydrogen storage materials with high hydrogen capacity and light weight, Mg-based alloys have attracted much attention. This review introduces an effective technique in producing bulk ultrafine-grained (UFG) Mg alloys and promoting its hydrogen storage property, namely, equal-channel angular pressing (ECAP). This paper briefly describes the technical principle of ECA...

Inconel 718 was successfully processed by multi-pass high-pressure sliding (MP-HPS) for production of ultrafine-grained structures in rods with upsized dimensions. An (UFG) structure an average grain size ~ 140 nm developed through rotation 45°. Tensile testing at 1073 K initial strain rate 2x10-2 s−1 led to superplastic elongations more than 400%. A relation is established between hardness and...