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Titolo:
Recrystallization control of dilute molybdenum-titanium alloys by multi-step internal nitriding
Autore:
Nagae, M; Takada, J; Takemoto, Y; Hiraoka, Y; Yoshio, T;
Indirizzi:
Okayama Univ, Fac Environm Sci & Technol, Dept Environm Chem & Mat, Okayama 7008530, Japan Okayama Univ Okayama Japan 7008530 nm Chem & Mat, Okayama 7008530, Japan Okayama Univ, Fac Engn, Dept Appl Chem, Okayama 7008530, Japan Okayama Univ Okayama Japan 7008530 ept Appl Chem, Okayama 7008530, Japan Okayama Univ, Fac Engn, Dept Mech Engn, Okayama 7008530, Japan Okayama Univ Okayama Japan 7008530 ept Mech Engn, Okayama 7008530, Japan Okayama Univ Sci, Fac Sci, Dept Appl Phys, Okayama 7008530, Japan Okayama Univ Sci Okayama Japan 7008530 Appl Phys, Okayama 7008530, Japan
Titolo Testata:
JOURNAL OF THE JAPAN INSTITUTE OF METALS
fascicolo: 9, volume: 64, anno: 2000,
pagine: 747 - 750
SICI:
0021-4876(200009)64:9<747:RCODMA>2.0.ZU;2-8
Fonte:
ISI
Lingua:
JPN
Keywords:
internal nitriding; recrystallization control; molybdenum-titanium alloy; optical microscopy; transmission electron microscopy; recrystallization temperature; precipitates; pinning effect;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Nagae, M Okayama Univ, Fac Environm Sci & Technol, Dept Environm Chem & Mat, 2-5-1 Shikata Cho, Okayama 7008530, Japan Okayama Univ 2-5-1 Shikata ChoOkayama Japan 7008530 8530, Japan
Citazione:
M. Nagae et al., "Recrystallization control of dilute molybdenum-titanium alloys by multi-step internal nitriding", J JPN METAL, 64(9), 2000, pp. 747-750

Abstract

The control of microstructure and recrystallization temperature in the internally nitrided dilute Mo-Ti alloys was studied through a novel three-stepnitriding process at 900 to 1600 degreesC in Na gas, in order to develop highly ductile Mo alloys having a heavily deformed microstructure near the specimen surface. Primary internal nitriding process below the recrystallization temperature of the present alloys at around 1000 degreesC brings uniform dispersion of superfine Ti-nitride precipitates in the Mo matrix where the deformation microstructure remains. These superfine precipitates decompose and disappear after heating at 1200 degreesC in a vacuum. However, aftersecondary nitriding at 1500 degreesC in a nitrogen atmosphere, those particles grew up to be stick-shaped particles with a length of 50 to 120 nm without the recrystallization of Mo matrix within about 130 mum from the specimen surface. The depth of the region where the recrystallization of Mo matrix was suppressed was greatly dependent upon the secondary nitriding temperature. The third nitriding was conducted at 1500 or 1600 degreesC. For the specimen nitrided at 1600 degreesC, the recrystallization temperature in a vacuum was elevated above 1600 degreesC.

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Documento generato il 11/07/20 alle ore 19:37:38