Dynamic Strain Ageing (DSA) has reached widespread acceptance since its proposal in the 1940’s as mechanism behind Portevin-Le Chatelier effect ferritic steels. However, it remains an open question to whether classical can be extended Face-Centred Cubic (FCC) alloys, including nickel-based superalloys, often implicitly assumed. Given historical link between serrated flow and loss of ductility s...

Determination of critical points on hot stress-strain curve of metals is crucial in thermo-mechanical processes design. In this investigation a mathematical modeling is given to illustrate the behavior of metal during hot deformation processes such as hot rolling. The critical strain for the onset of dynamic recrystallization has been obtained as a function of strain at the maximum stress. In a...

Abstract Eighty-seven red wines produced from grapes of the grape variety Gaglioppo Calabria region (vintage 2009) were analysed by standard methods after 4 and 120 months ageing. So, a total 29 selected starters Saccharomyces cerevisiae —3 wild type, 12 monoclonal cultures, 14 hybrids—inoculated in triplicate studied for their effects on colour natural antioxidant power keeping wine. Wine agei...

The forced vibration behaviors are examined for nonlocal strain gradient nanobeams with surface effects subjected to a moving harmonic load travelling with a constant velocity in terms of three beam models namely, the Euler-Bernoulli, Timoshenko and modified Timoshenko beam models. The modification for nonlocal strain gradient Timoshenko nanobeams is exerted to the constitutive equations by exc...

the flow stress of steel depends significantly on microstructural changes taken place during hot deformation processes. in hot deformation processes, the flow stress of steel is influenced by two main metallurgical phenomena, i.e. recovery and recrystallization, along with its chemical composition and thermo-mechanical parameters. the final mechanical properties of steel are also determined by ...