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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials >A study on detection of creep damage before crack initiation in austenitic stainless steel
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A study on detection of creep damage before crack initiation in austenitic stainless steel

机译：奥氏体不锈钢裂纹产生前蠕变损伤检测的研究

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摘要

The magnetic property changes in Type 304 stainless steel as creep damage progresses. The microstructure related to this magnetic property changes has been investigated by using SEM-EDX, SEM-EBSP, magneto-optical Kerr effect microscope and magnetic force microscope. One reason for magnetic property changes is the transformation from face-centered cubic to body-centered cubic phases with lower chromium content. These magnetic body-centered cubic phases are observed in grains along the stress axis or near the triple points, at which are sites of severe deformation. On the other hand, for aged materials magnetic phases are observed only at grain boundaries. The formation of magnetic phases is related to creep damage in Type 304 stainless steel.
机译：304型不锈钢的磁性能会随着蠕变损伤的发展而变化。通过使用SEM-EDX，SEM-EBSP，磁光Kerr效应显微镜和磁力显微镜研究了与这种磁性变化有关的微观结构。磁性质变化的原因之一是从具有较低铬含量的面心立方相转变为体心立方相。这些晶粒中心的立方相沿应力轴或在三点附近观察到，这是严重变形的部位。另一方面，对于时效材料，仅在晶界观察到磁相。磁相的形成与304型不锈钢的蠕变损伤有关。

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