Deformation twinning is observed in numerous engineering and naturally occurring materials. However, a fundamental law for critical twinning stress has not yet emerged. We resolve this long-standing issue by integrating twin-energy pathways obtained via ab initio density functional theory with heterogeneous, dislocation-based twin nucleation models. Through a hierarchical theory, we establish an analytical expression that quantitatively predicts the critical twinning stress in face-centered cubic metals without any empiricism at any length scale. Our theory predicts a monotonic relation between the unstable twin stacking fault energy and twin nucleation stress revealing the physics of twinning.
Description
ScienceDirect - Acta Materialia : Predicting twinning stress in fcc metals: Linking twin-energy pathways to twin nucleation
%0 Journal Article
%1 Kibey20076843
%A Kibey, S.
%A Liu, J.B.
%A Johnson, D.D.
%A Sehitoglu, H.
%D 2007
%J Acta Materialia
%K ab initio twinning
%N 20
%P 6843 - 6851
%R 10.1016/j.actamat.2007.08.042
%T Predicting twinning stress in fcc metals: Linking twin-energy pathways to twin nucleation
%U http://www.sciencedirect.com/science/article/B6TW8-4PXNHW3-1/2/2a67742903c9b81f9093651fc34d9637
%V 55
%X Deformation twinning is observed in numerous engineering and naturally occurring materials. However, a fundamental law for critical twinning stress has not yet emerged. We resolve this long-standing issue by integrating twin-energy pathways obtained via ab initio density functional theory with heterogeneous, dislocation-based twin nucleation models. Through a hierarchical theory, we establish an analytical expression that quantitatively predicts the critical twinning stress in face-centered cubic metals without any empiricism at any length scale. Our theory predicts a monotonic relation between the unstable twin stacking fault energy and twin nucleation stress revealing the physics of twinning.
@article{Kibey20076843,
abstract = {Deformation twinning is observed in numerous engineering and naturally occurring materials. However, a fundamental law for critical twinning stress has not yet emerged. We resolve this long-standing issue by integrating twin-energy pathways obtained via ab initio density functional theory with heterogeneous, dislocation-based twin nucleation models. Through a hierarchical theory, we establish an analytical expression that quantitatively predicts the critical twinning stress in face-centered cubic metals without any empiricism at any length scale. Our theory predicts a monotonic relation between the unstable twin stacking fault energy and twin nucleation stress revealing the physics of twinning.},
added-at = {2010-11-03T17:45:05.000+0100},
author = {Kibey, S. and Liu, J.B. and Johnson, D.D. and Sehitoglu, H.},
biburl = {https://www.bibsonomy.org/bibtex/2aa6fce370f58f970bfd35bcd47989f18/riche.ma},
description = {ScienceDirect - Acta Materialia : Predicting twinning stress in fcc metals: Linking twin-energy pathways to twin nucleation},
doi = {10.1016/j.actamat.2007.08.042},
interhash = {b4805a102f4a16605bbcb3a0097a17ec},
intrahash = {aa6fce370f58f970bfd35bcd47989f18},
issn = {1359-6454},
journal = {Acta Materialia},
keywords = {ab initio twinning},
number = 20,
pages = {6843 - 6851},
timestamp = {2010-11-03T17:45:05.000+0100},
title = {Predicting twinning stress in fcc metals: Linking twin-energy pathways to twin nucleation},
url = {http://www.sciencedirect.com/science/article/B6TW8-4PXNHW3-1/2/2a67742903c9b81f9093651fc34d9637},
volume = 55,
year = 2007
}