Strain localization during discontinuous plastic flow at extremely low temperatures
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- 作者：J. Tabin ; kubatabin@mech.pk.edu.pl" class="auth_mail" title="E-mail the corresponding author ; B. Skoczen ; J. Bielski
- 关键词：Multiscale constitutive model ; Discontinuous plastic flow ; Cryogenic temperatures ; Strain localization
- 刊名：International Journal of Solids and Structures
- 出版年：2016
- 出版时间：15 October 2016
- 年：2016
- 卷：97-98
- 期：Complete
- 页码：593-612
- 全文大小：5932 K
文摘
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The paper deals with an extended, physically based, multiaxial constitutive model of discontinuous plastic flow, including new feature of strain localization at near 0 K temperatures in polycrystalline materials.
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Another new feature defines the drop of stress being entirely determined by dislocations density before and after the serration.
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Regular way of nucleation and free unconstrained glide of slip bands is observed within the sample, in the absence of phase transformation.
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Contrary to former views, strong coupling of discontinuous plastic flow with fcc-bcc phase transformation in metastable materials is observed.