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首页> 外文会议>Materials structure amp; micromechanics of fracture VIII >AFM Study of Microstructure Role in the Cyclic Plasticity of Martensitic Steel
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AFM Study of Microstructure Role in the Cyclic Plasticity of Martensitic Steel

机译：AFM在马氏体钢循环塑性中的微观结构作用研究

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The paper presents the description of FSMs (fatigue slip markings) and the evaluation of cyclic plasticity markings of a 12%Cr martensitic steel by AFM surface analyses. The microstructure of a 12%Cr martensitic steel, quenched and tempered in air, consists of prior austenite grains, packets, blocks, and laths. The low cycle fatigue (LCF) test at a total strain range Δε_t=1.2% was interrupted at different life fractions for the surface relief investigation by AFM. The localization of FSMs relatively to the different microstructural interfaces of the studied steel was proposed. The principal FSMs, appeared in the first fatigue cycle, are likely to be localized at the packet and block boundaries, while the secondary one (appeared later at 44% of lifetime) are at the lath boundaries or in the laths. The height of principal and secondary FSMs increases constantly during LCF cycling.
机译：本文介绍了FSM（疲劳滑移标记）的描述以及通过AFM表面分析评估12％Cr马氏体钢的循环塑性标记。在空气中淬火和回火的12％Cr马氏体钢的显微组织由先前的奥氏体晶粒，小包，块和板条组成。为了通过AFM进行表面起伏研究，在总寿命范围Δε_t= 1.2％的低循环疲劳（LCF）测试被中断了不同的使用寿命。提出了相对于研究钢的不同微观结构界面的FSMs的局部化。主要的FSM出现在第一个疲劳周期中，很可能位于包和块的边界，而次要的FSM（出现在寿命的44％之后）位于板条边界或板条中。在LCF循环期间，主FSM和辅助FSM的高度不断增加。

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