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Titolo:
NITROGEN IN PRESSURE-DIFFUSED POWDER IRON-ALLOYS
Autore:
RAWERS JC; FRISK K; GOVIER D;
Indirizzi:
US BUR MINES,ALBANY RES CTR,1450 QUEEN AVE SW ALBANY OR 97321 ROYAL INST MET S-11428 STOCKHOLM SWEDEN
Titolo Testata:
Materials science & engineering. A, Structural materials: properties, microstructure and processing
fascicolo: 1-2, volume: 177, anno: 1994,
pagine: 243 - 251
SICI:
0921-5093(1994)177:1-2<243:NIPPI>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
NI-N SYSTEM; THERMODYNAMIC EVALUATION; STEELS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
28
Recensione:
Indirizzi per estratti:
Citazione:
J.C. Rawers et al., "NITROGEN IN PRESSURE-DIFFUSED POWDER IRON-ALLOYS", Materials science & engineering. A, Structural materials: properties, microstructure and processing, 177(1-2), 1994, pp. 243-251

Abstract

In this study, high-pressure high-temperature diffusion at the US Bureau of Mines was used to increase the nitrogen concentration in both b.c.c.- and f.c.c.-iron alloy powders. Microstructures of the powders and precipitates were determined using microprobe, scanning electron microscopy (SEM) and X-ray diffraction. Formation of Fe4N was observed in Fe, Fe-1018, and Fe-2Al. For Fe-Cr alloys, either b.c.c. or f.c.c., the first precipitate to form was CrN. Experimental results compared favourably with computer generated phase diagrams and computer predictions from the Swedish Institute for Metals Research of nitrogen concentration and as a function of diffusion pressures.

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