科技报告详细信息
Multiscale Characterization of bcc Crystals Deformed to Large Extents of Strain
Florando, J ; LeBlanc, M ; Lassila, D ; Bulatov, V ; Rhee, M ; Arsenlis, A ; Becker, R ; Jr., J M ; Magid, K
Lawrence Livermore National Laboratory
关键词: Testing;    Plasticity;    36 Materials Science;    Dislocations;    Simulation;   
DOI  :  10.2172/919599
RP-ID  :  UCRL-TR-228282
RP-ID  :  W-7405-ENG-48
RP-ID  :  919599
美国|英语
来源: UNT Digital Library
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【 摘 要 】

In an effort to help advance the predictive capability of LLNL's multiscale modeling program a new experimental technique has been developed to provide high fidelity data on metallic single crystals out to relatively large extents of strain. The technique uses a '6 Degrees of Freedom' testing apparatus in conjunction with a 3-D image correlation system. Utilizing this technique, a series of experiments have been performed that reveal unexpected behavior which cannot be explained using traditional crystal plasticity theory. In addition, analysis and characterization techniques have also been developed to help quantify the unexpected behavior. Interactions with multiscale modelers include the development of a possible mechanism that might explain the anomalous behavior, as well as the discovery of a new 4-node dislocation junction.

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