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首页> 外文期刊>Materials Science and Engineering >A screw dislocation interacting with a coated nano-inhomogeneity incorporating interface stress
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A screw dislocation interacting with a coated nano-inhomogeneity incorporating interface stress

机译：螺钉位错与结合界面应力的涂层纳米异质性相互作用

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摘要

Effect of interface stress on the interaction between a screw dislocation and a coated nano-inhomogeneity is investigated in the framework of surface elasticity. By using the complex variable function method, the stress fields in heterogeneous materials and the image force acting on the screw dislocation are derived analytically. The results indicate that, when the radius of the coated inhomogeneity is reduced to nanometers, the influence of interface stress on the motion of the dislocation near the inhomogeneity becomes significant and the image force acting on the screw dislocation depends on the size of the coated inhomogeneity, which differs from the classical solution. And it is showed that the thicker coated layer relative to inclusion decreases or increases the influence of a coated inclusion on the image force of dislocation, not as expected.
机译：在表面弹性的框架内，研究了界面应力对螺钉位错与涂层纳米不均匀性之间相互作用的影响。通过使用复变函数方法，分析得出了异质材料中的应力场和作用在螺钉位错上的像力。结果表明，当涂层的不均匀半径减小到纳米时，界面应力对不均匀附近的位错运动的影响变得显着，作用在螺钉位错上的像力取决于涂层不均匀的大小，这与经典解决方案不同。并且表明，相对于夹杂物而言，较厚的涂层降低或增加了涂层夹杂物对位错像力的影响，这与预期的不同。

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