Open AccessMicrostructure-based approach for predicting crack initiation and early growth in metals.
Author(s) -
James V. Cox,
John M Emery,
Luke N. Brewer,
Joseph D. Puskar,
Timothy Bartel,
Rémi Dingreville,
James W. Foulk,
Corbett Chandler. Battaile,
Brad Boyce
Publication year - 2009
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/1001018
Subject(s) - microscale chemistry , microstructure , nucleation , materials science , cracking , paris' law , fatigue cracking , deformation (meteorology) , metallurgy , fatigue testing , structural engineering , fracture mechanics , crack closure , composite material , engineering , thermodynamics , physics , mathematics education , mathematics
Fatigue cracking in metals has been and is an area of great importance to the science and technology of structural materials for quite some time. The earliest stages of fatigue crack nucleation and growth are dominated by the microstructure and yet few models are able to predict the fatigue behavior during these stages because of a lack of microstructural physics in the models. This program has developed several new simulation tools to increase the microstructural physics available for fatigue prediction. In addition, this program has extended and developed microscale experimental methods to allow the validation of new microstructural models for deformation in metals. We have applied these developments to fatigue experiments in metals where the microstructure has been intentionally varied
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