Microstructure Evolution during Recrystallization of Newly Developed Low Ni High Mn‐N Stainless Steels |
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Authors: | JA Jiménez F Peñalba M Carsí OA Ruano |
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Affiliation: | 1. Departamento de Metalurgia Física, CENIM, CSIC, Av. Gregorio del Amo 8, 28040 Madrid, Spain,;2. Fundación INASMET, Mikeletegi Pasealekua, 2, 20009 San Sebastián, Spain |
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Abstract: | Low cost stainless steels where nickel is replaced in a conventional Fe‐Cr‐Ni stainless steel by manganese and nitrogen were studied. In this work, three new steels based on the system (mass %) Fe‐18Cr‐15Mn‐2Ni‐2Mo‐XN were prepared and their microstructure after each treatment was evaluated by optical and scanning electron microscopy, and X‐ray diffraction. A good correlation between texture and microstructure evolution during annealing was established. A randomization of the texture during recrystallization of the austenite was observed. Recrystallization starts at temperatures above 850°C, and after annealing for 0.5 h at 900°C, the austenite is completely recrystallized, reaching the orientation density a value near 1. Precipitation of σ ‐ phase was observed in the samples annealed at temperatures ranging from 700 to 950°C. |
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Keywords: | Austeniticstainless steel Recrystallization X‐ray diffraction Texture σ ‐ phase |
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