Materials Sciences and Applications

Volume 13, Issue 5 (May 2022)

ISSN Print: 2153-117X   ISSN Online: 2153-1188

Google-based Impact Factor: 1.34  Citations  

Application of the Mechanical Threshold Stress Model to Large Strain Processing

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DOI: 10.4236/msa.2022.135016    196 Downloads   1,027 Views  Citations
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ABSTRACT

Large-strain deformations introduce several confounding factors that affect the application of the Mechanical Threshold Stress model. These include the decrease with the increasing stress of the normalized activation energy characterizing deformation kinetics, the tendency toward Stage IV hardening at high strains, and the influence of crystallographic texture. Minor additions to the Mechanical Threshold Stress model are introduced to account for variations of the activation energy and the addition of Stage IV hardening. Crystallographic texture cannot be modeled using an isotropic formulation, but some common trends when analyzing predominantly shear deformation followed by uniaxial deformation are described. Comparisons of model predictions with measurements in copper processed using Equal Channel Angular Pressing are described.

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Follansbee, P. (2022) Application of the Mechanical Threshold Stress Model to Large Strain Processing. Materials Sciences and Applications, 13, 300-316. doi: 10.4236/msa.2022.135016.

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