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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials >Cyclically induced softening due to low-angle boundary annihilation in a martensitic steel
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Cyclically induced softening due to low-angle boundary annihilation in a martensitic steel

机译：马氏体钢中低角度边界an没引起的循环诱发软化

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摘要

Martensitic steels are known for their softening during cyclic tests carried out at high temperature. The softening has been at least partially explained by lath and sub-grain boundary elimination. This article is dedicated to an attempt at modelling both phenomena. Thanks to mechanical tests it is shown that the softening is mainly due to a decrease of the backstress. Transmission electron microscopy allows us to propose a mechanism of low-angle boundary elimination. Annihilation between dislocations of low-angle boundaries and incident mobile dislocations is modelled. The macroscopic backstress is finally computed using a Hall-Petch law and the Taylor model.
机译：马氏体钢以其在高温下进行的循环测试过程中的软化作用而闻名。至少部分地通过板条和次颗粒边界消除来解释了软化。本文致力于对两种现象进行建模的尝试。通过机械测试表明，软化主要归因于背应力的减小。透射电子显微镜使我们可以提出一种低角度边界消除的机制。对低角度边界的位错和入射的移动位错之间的灭进行了建模。最后使用霍尔-帕奇定律和泰勒模型计算宏观背应力。

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