期刊
PROGRESS IN NUCLEAR ENERGY
卷 141, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.pnucene.2021.103926
关键词
Crystal plasticity; Dislocation mobility; Irradiation hardening; Strain localization
The mechanical response and lifetime of nuclear structural materials are strongly affected by radiation effects. The current work models the irradiation effect to predict the dose-dependent changes in effective dislocation mobility, focusing on the defect-induced apparent temperature shift.
The mechanical response of nuclear structural materials and their lifetime are strongly affected by radiation effects. This influence is of concern, especially in body centered cubic materials, which exhibiting a welldefined ductile to brittle transition. The ductile to brittle transition temperature itself is dose-dependent and may rise to or above the room temperature. In the current work, irradiation effect is modeled to predict the dose-dependent changes of the effective dislocation mobility, represented by the Defect Induced Apparent Temperature shift (Delta DIAT). Mainly dislocation based crystal plasticity material model is used rather than a phenomenological approach. This material model accounts for both thermally activated dislocation mobility and dislocation mobility in an athermal regime of body centered cubic materials. The defect-induced evolution of Delta DIAT in turn analyzed and their relations with the fracture response are highlighted and discussed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据