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Open AccessFeature PaperArticle

Flow Stress of bcc Metals over a Wide Range of Temperature and Strain Rates

Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, I-03043 Cassino, Italy
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Metals 2020, 10(1), 120; https://doi.org/10.3390/met10010120
Received: 25 November 2019 / Revised: 26 December 2019 / Accepted: 9 January 2020 / Published: 13 January 2020
(This article belongs to the Special Issue Metal Plasticity and Fatigue at High Temperature)
A physical-based model for the flow stress of bcc metals is presented. Here, thermally activated and viscous drag regimes are considered. For the thermally activated component of the flow stress, the diffusion-controlled regime at elevated temperature is also taken into account assuming the non-linear dependence of the activation volume on temperature. The model was applied to A508 (16MND5) steel showing the possibility to accurately describe the variation of the flow stress over the entire temperature range (from 0 K to Tm) and over a wide strain-rate range. View Full-Text
Keywords: flow stress; activation volume; strain rate; temperature; bcc flow stress; activation volume; strain rate; temperature; bcc
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MDPI and ACS Style

Testa, G.; Bonora, N.; Ruggiero, A.; Iannitti, G. Flow Stress of bcc Metals over a Wide Range of Temperature and Strain Rates. Metals 2020, 10, 120.

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