Molecular Dynamics Simulation Study on the Effect of the Loading Direction on the Deformation Mechanism of Pearlite

Molecular dynamics simulations were carried out to study the effect of the loading direction on the deformation behavior of the pearlite structure with a Bagaryatsky orientation relationship at the ferrite-cementite interface. We found excellent ductility in the ferrite and pearlite nanocomposites along the 1¯10f||001c\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\left[ {\bar{1}10} \right]_{f} ||\left[ {001} \right]_{c}$$\end{document} loading direction, while a brittle behavior was observed along the 111f||100c\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\left[ {111} \right]_{f} ||\left[ {100} \right]_{c}$$\end{document} loading direction because of the reduced number of activated slip systems. Additionally, we reveal that the ductility is improved by either increasing the temperature or reducing the interlamellar spacing.