Impact properties of high-nitrogen austenitic stainless steels

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• 作者：Zhizhong Yuan ; Qixun Dai ; Xiaonong Cheng ; Kangmin Chen ; Wenwei Xu
• 关键词：Austenitic stainless steel ; Nitrogen ; Impact property ; Mechanical property
• 刊名：Materials Science and Engineering ; A
• 出版年：2008
• 期刊代码：61_09215093
• 类别：ms
• 出版时间：25 February 2008
• 卷：475
• 期：1-2
• 页码：202-206
• 文件大小：1787 K

摘要

The Charpy v notch (CVN) impact properties of two kinds of high-nitrogen austenitic stainless steels (HNASS), Fe–24Mn–13Cr–1Ni–0.44N and Fe–24Mn–18Cr–3Ni–0.62N, were investigated at different temperatures. Results show that with the increase of nitrogen concentration, the absorbed-in-fracture energy decreases rapidly; microstructures, such as peeled off layer and transgranular brittle fracture facet (TBFF) are the features of brittle fracture of HNASSs when impacted at −190 °C. The transformation of fracture microstructures of them with the descending temperatures was also proposed.