Impact properties of high-nitrogen austenitic stainless steels

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...

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Veröffentlicht in:	Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2008-02, Vol.475 (1), p.202-206
Hauptverfasser:	Yuan, Zhizhong, Dai, Qixun, Cheng, Xiaonong, Chen, Kangmin, Xu, Wenwei
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Austenitic stainless steel Exact sciences and technology Fractures Impact property Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Mechanical property Metals. Metallurgy Nitrogen
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Beschreibung
Zusammenfassung:	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.
ISSN:	0921-5093 1873-4936
DOI:	10.1016/j.msea.2007.04.122