DESIGN AND DEVELOPMENT OF HOT CORROSION-RESISTANT NICKEL-BASE SINGLE-CRYSTAL SUPERALLOYS BY THE D-ELECTRONS ALLOY DESIGN THEORY .2. EFFECTS OF REFRACTORY-METALS TI, TA, AND NB ON MICROSTRUCTURES AND PROPERTIES

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	DESIGN AND DEVELOPMENT OF HOT CORROSION-RESISTANT NICKEL-BASE SINGLE-CRYSTAL SUPERALLOYS BY THE D-ELECTRONS ALLOY DESIGN THEORY .2. EFFECTS OF REFRACTORY-METALS TI, TA, AND NB ON MICROSTRUCTURES AND PROPERTIES
	J. S. Zhang ; Z. Q. Hu ; Y. Murata ; M. Morinaga ; N. Yukawa
刊名	Metallurgical Transactions a-Physical Metallurgy and Materials Science
	1993
卷号	24 期号:11 页码:2451-2464
关键词	accelerated oxidation tantalum
ISSN号	0360-2133
中文摘要	A systematic study of the effects of refractory metals Ti, Ta, and Nb on the microstructures and properties was conducted with a hot corrosion-resistant alloy system Ni-16Cr-9Al-4Co-2W-1Mo-(0 approximately 4)Ti-(0 approximately 4)Ta-(0 approximately 4)Nb (in atomic percent) which was selected based on the d-electrons alloy design theory and some basic considerations in alloying features of single-crystal nickel-base superalloys. The contour lines of solidification reaction temperatures and eutectic (gamma + gamma') volume fraction in the Ti-Ta-Nb compositional triangle were determined by differential thermal analysis (DTA) and imaging analyzer. Compared with the reference alloy IN738LC, in most of the compositional ranges studied, the designed alloys show very low amounts of eutectic (gamma + gamma') (less-than-or-equal-to 0.4 vol pct), narrow solidification ranges (less-than-or-equal-to 65-degrees-C), and wide 'heat-treatment windows'' (>100-degrees-C). This indicates that the alloys should have the promising microstructural stability, single-crystal castability, and be easier for complete solution treatment. In a wide compositional range, the designed alloys showed good hot corrosion resistance (weight loss less than 20 mg/cm2 after 24 hours kept in molten salt at 900-degrees-C). By summarizing the results, the promising alloy compositional ranges of the alloys with balanced properties were determined for the final step of the alloy design, i.e., to grow single crystal and characterize mechanical properties of the alloys selected from the previously mentioned regions.
原文出处	://WOS:A1993MF55600009
公开日期	2012-04-14
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/39175]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	J. S. Zhang,Z. Q. Hu,Y. Murata,et al. DESIGN AND DEVELOPMENT OF HOT CORROSION-RESISTANT NICKEL-BASE SINGLE-CRYSTAL SUPERALLOYS BY THE D-ELECTRONS ALLOY DESIGN THEORY .2. EFFECTS OF REFRACTORY-METALS TI, TA, AND NB ON MICROSTRUCTURES AND PROPERTIES[J]. Metallurgical Transactions a-Physical Metallurgy and Materials Science,1993,24(11):2451-2464.
APA	J. S. Zhang,Z. Q. Hu,Y. Murata,M. Morinaga,&N. Yukawa.(1993).DESIGN AND DEVELOPMENT OF HOT CORROSION-RESISTANT NICKEL-BASE SINGLE-CRYSTAL SUPERALLOYS BY THE D-ELECTRONS ALLOY DESIGN THEORY .2. EFFECTS OF REFRACTORY-METALS TI, TA, AND NB ON MICROSTRUCTURES AND PROPERTIES.Metallurgical Transactions a-Physical Metallurgy and Materials Science,24(11),2451-2464.
MLA	J. S. Zhang,et al."DESIGN AND DEVELOPMENT OF HOT CORROSION-RESISTANT NICKEL-BASE SINGLE-CRYSTAL SUPERALLOYS BY THE D-ELECTRONS ALLOY DESIGN THEORY .2. EFFECTS OF REFRACTORY-METALS TI, TA, AND NB ON MICROSTRUCTURES AND PROPERTIES".Metallurgical Transactions a-Physical Metallurgy and Materials Science 24.11(1993):2451-2464.