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Potential of nanoparticles in improving properties of spring steel
Podgornik, Bojan, 1970- ...
Currently, there is a growing awareness about the potential benefits of nanotechnologies in the modern engineering industry, and a number of investigations are carried out in the area of ...nanostructured steels. The focus is on the manipulation of microstructure at the nano-scale through innovative processing techniques and adoption of novel alloying strategies. However, the main challenge in realizing the immense potential of nano-engineered steels is to manufacture large components and quantities at low costs, where homogeneous dispersion of ceramic nano-particles in molten metals is extremely hard to achieve. Investigation was performed on the conventional 51CrV4 spring steel, where different types of nano-particles were added into the melt. Effect of nanoparticles alloying was investigated after hot rolling, soft annealing and vacuum heat treatment using typical processing parameters. Research was focused on the yield and ultimate tensile strength, fracture toughness and fatigue properties. Results of this investigation indicate that nano-particles reinforcement of spring steel is feasible even by using simple liquid metal casting routes, with the nano-particles type and size having impact on ultimate tensile strength and fatigue limit.
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