Atomic Force Microscopy Study of the Early Fatigue Damage
Atomic Force Microscopy Study of the Early Fatigue Damage
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早期疲劳损伤的原子力显微镜研究
DOI：
10.4028/www.scientific.net/msf.482.45
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
K. Obrtlík
中科院分区：
文献类型：
--
作者：
J. Polák;J. Man;K. Obrtlík
综述了原子力显微镜在研究材料表面特征和早期疲劳损伤方面的可能性。给出了原子力显微镜记录的循环应变材料表面出现真实浮雕的例子。地表起伏的特征是由挤压和侵入组成的明确的持久滑动标记。挤压和侵入的形状可以通过观察金属表面和复制品并结合高分辨率扫描电子显微镜来获得。报道了奥氏体钢和铁素体不锈钢在疲劳寿命过程中挤出物的生长。实验数据与局部循环塑性应变模型和疲劳裂纹形核模型的预测结果进行了比较。
The possibilities of atomic force microscopy in studying surface features and early fatigue damage in materials are reviewed. Examples of a true relief arising on the surface of cyclically strained materials as recorded by atomic force microscopy are given. Characteristic features of the surface relief are well-defined persistent slip markings consisting of extrusions and intrusions. The shape of extrusions and intrusions can be obtained by observation of metal surface and replicas and in combination with high resolution scanning electron microscopy. The growth of extrusions during fatigue life is reported for austenitic and ferritic stainless steels. The experimental data are compared with models of the localized cyclic plastic straining and predictions of the fatigue crack nucleation models.