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- W4385492020 abstract "Abstract. As the temperature rises, metals should lose strength. However, under some combinations of strain rate and temperature, they show a dramatic increase in strength due to the interaction of impurity/solute atoms with the dislocations, a phenomenon known as dynamic strain aging (DSA). Thermomechanical stress-strain curves have been modeled using a variety of numerical approaches, but accurately modeling DSA activation remains a challenge. The activation free energy for dislocation movement rises during DSA, as there are more solute atoms concentrated at the local barriers. As a result, we see an increase in strength. This work modifies the physical parameters-based VA model for commercially pure bcc Niobium, which is known to display DSA at low strain rates and elevated temperatures, in order to create a constitutive model that can accurately capture DSA." @default.
- W4385492020 created "2023-08-03" @default.
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- W4385492020 date "2023-08-10" @default.
- W4385492020 modified "2023-09-27" @default.
- W4385492020 title "Constitutive modeling of dynamic strain aging in niobium" @default.
- W4385492020 doi "https://doi.org/10.21741/9781644902592-14" @default.
- W4385492020 hasPublicationYear "2023" @default.
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