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oai:uvadoc.uva.es:10324/219102025-03-26T16:41:31Zcom_10324_1136com_10324_931com_10324_894col_10324_1218

García Cabezón, Ana Cristina Martín Pedrosa, Fernando Blanco Val, María Yolanda 2016-12-22T10:05:06Z 2016-12-22T10:05:06Z 2009 Journal of Magnetism and Magnetic Materials 2009, 321, 3171–3177 0304-8853 http://uvadoc.uva.es/handle/10324/21910 10.1016/j.jmmm.2009.05.025 3171 3177 Abnormal magnetic behaviour of powder metallurgy austenitic stainless steels sintered in nitrogen 321 The magnetic response of AISI 304L and AISI 316L obtained through powder metallurgy and sintered in nitrogen were studied. AISI 304L sintered in nitrogen showed a ferromagnetic behaviour in as-sintered state while AISI 316L was paramagnetic. After solution annealing both were paramagnetic. Magnetic behaviour was analysed by using a vibrating sample magnetometer, a magnetic ferritscope and magnetic etching. A microstructural characterization was performed by means of optical metallography, X-ray diffraction, scanning electron microscopy (SEM) and energy dispersive analysis of X-rays (EDS). Some samples when needed were submitted to aged heat treatments at 675 and 875 °C for 90 min, 4, 6, 8 or 48 h. The main microstructural feature found was the presence of a lamellar constituent formed by nitride precipitates and an interlamellar matrix of austenite and/or ferrite. The abnormal magnetic response was explained based on this. Dirección General de Programas y Transferencia de Conocimiento, Ministerio de Ciencia e Innovación, España, MAT2008-02788 application/pdf eng ELSERVIER info:eu-repo/semantics/openAccess ELSERVIER Magnetic measurement Powder metallurgy Austenitic stainless steel Abnormal magnetic behaviour of powder metallurgy austenitic stainless steels sintered in nitrogen info:eu-repo/semantics/article SI