Shear-transformation-zone theory of plastic deformation near the glass transition

@article{citeulike:2878241, abstract = {The shear-transformation-zone (STZ) theory of plastic deformation in glass-forming materials is reformulated in light of recent progress in understanding the roles played by the effective disorder temperature and entropy flow in nonequilibrium situations. A distinction between fast and slow internal-state variables reduces the theory to just two coupled equations of motion, one describing the plastic response to applied stresses and the other the dynamics of the effective temperature. The analysis leading to these equations contains, as a by-product, a fundamental reinterpretation of the dynamic yield stress in amorphous materials. In order to put all these concepts together in a realistic context, I conclude with a reexamination of the experimentally observed rheological behavior of a bulk metallic glass. That reexamination serves as a test of the STZ dynamics, confirming that system parameters obtained from steady-state properties such as the viscosity can be used to predict transient behaviors.}, author = {Langer, J. S. }, citeulike-article-id = {2878241}, doi = {10.1103/PhysRevE.77.021502}, journal = {Physical Review E (Statistical, Nonlinear, and Soft Matter Physics)}, keywords = {langer, review, shear, stz, theroy}, number = {2}, posted-at = {2008-06-09 22:44:56}, priority = {2}, publisher = {APS}, title = {Shear-transformation-zone theory of plastic deformation near the glass transition}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PLEEE8000077000002021502000001\&idtype=cvips\&gifs=yes}, volume = {77}, year = {2008} }

TY - JOUR ID - citeulike:2878241 L3 - citeulike-article-id:2878241 TI - Shear-transformation-zone theory of plastic deformation near the glass transition JF - Physical Review E (Statistical, Nonlinear, and Soft Matter Physics) VL - 77 IS - 2 PB - APS N2 - The shear-transformation-zone (STZ) theory of plastic deformation in glass-forming materials is reformulated in light of recent progress in understanding the roles played by the effective disorder temperature and entropy flow in nonequilibrium situations. A distinction between fast and slow internal-state variables reduces the theory to just two coupled equations of motion, one describing the plastic response to applied stresses and the other the dynamics of the effective temperature. The analysis leading to these equations contains, as a by-product, a fundamental reinterpretation of the dynamic yield stress in amorphous materials. In order to put all these concepts together in a realistic context, I conclude with a reexamination of the experimentally observed rheological behavior of a bulk metallic glass. That reexamination serves as a test of the STZ dynamics, confirming that system parameters obtained from steady-state properties such as the viscosity can be used to predict transient behaviors. KW - langer KW - review KW - shear KW - stz KW - theroy AU - Langer, JS PY - 2008/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PLEEE8000077000002021502000001&idtype=cvips&gifs=yes ER -