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Impression creep deformation behaviour of 316LN stainless steel

机译：316LN不锈钢的印象蠕变变形行为

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The impression creep deformation behaviour of 316LN SS was investigated from microstructure, substructure, microhardness and profilometry studies of the creep deformed region. Impression creep tests were conducted on 316LN SS in the temperature range of 923-973 K, at different punching stresses in the range of 472-760 MPa. The impression creep deformation was characterised by a hemispherically shaped plastic zone which developed around the indentation. The study revealed the distinct regions under the punch undergoing deformation to different extents. The deformation was found to occur predominently on (111) planes. The dislocations in the highly deformed region were well dispersed in the matrix. The size of the plastic zone was estimated to be similar to 1.5 times thediameter of the indenter based on the microhardness and profilometry studies. The critical spacing to be maintained between the adjacent indentations was estimated to be >5 times the diameter of indenter.
机译：从蠕变变形区的微观结构，亚结构，显微硬度和轮廓分析研究了316LN SS的压痕蠕变变形行为。在316LN SS上于923-973 K的温度范围内，在472-760 MPa范围内的不同冲压应力下进行了蠕变试验。压痕蠕变变形的特征是在压痕周围形成了一个半球形的塑性区。研究发现，冲头下方的不同区域受到不同程度的变形。发现变形主要发生在（111）平面上。高变形区中的位错很好地分散在基体中。根据显微硬度和轮廓测量法，塑料区域的大小估计约为压头直径的1.5倍。估计相邻凹口之间要保持的临界间距>压头直径的> 5倍。

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