A5009083964- Microstructure and mechanical properties
- Metal and Thin Film Mechanics
- Aluminum Alloys Composites Properties
- Microstructure and Mechanical Properties of Steels
- Surface Treatment and Residual Stress
- Advanced Surface Polishing Techniques
- Particle accelerators and beam dynamics
- Force Microscopy Techniques and Applications
Jiangsu University of Science and Technology
2022-2024
The limited ductility of nanocrystalline metals severely hinders their practical applications due to the absence strain hardening. In this study, we observe hardening in layer-grained models through molecular dynamics simulations. Our quantitative analysis demonstrates that grain boundary deformation induces hardening, while dislocation activities lead softening simulation model. This finding is fundamentally different from previous assumptions cause and leads softening. competition between...
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The brittle nature of nanocrystalline metals presents a significant challenge to their widespread application. Extensive efforts have been undertaken develop materials with high strength and good ductility. In this study, we discovered new type metal, namely, layer-grained Al, which exhibits both ductility owing its enhanced strain hardening ability as revealed by molecular dynamics simulation. Notably, the model displays instead equiaxed model. observed is attributed grain boundary...
Grain Boundaries and voids are common defects in nanocrystalline metals play a crucial role plastic deformation. In this study, molecular dynamics simulation is conducted to investigate the incipient plasticity of Σ5 STGB bicrystalline Cu with spherical void, as well its component monocrystals at 10 K. The results show homogeneous nucleation an elliptical 1/6<112> Shockley partial dislocation loop monocrystals. void-free bicrystal, initial nucleates homogeneously grain interior rather than...
The brittle nature of nanocrystalline metals remains a big problem restricting their wide application. Numerous efforts have been made to produce materials with both high strength and good ductility. In the present work, new type metal (layer-grained Al) is found be strong ductile due its increased strain hardening ability by molecular dynamics simulation. Strain observed in layer-grained model rather than equiaxed model. induced grain boundary deformation, which recognized cause softening...