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

IMR OpenIR

	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
	1993
发表期刊	Metallurgical Transactions a-Physical Metallurgy and Materials Science
ISSN	0360-2133
卷号	24 期号:11 页码:2451-2464
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.
部门归属	acad sinica,inst metal res,shenyang 110015,peoples r china. toyohashi univ technol,dept prod syst engn,toyohashi 441,japan.;zhang, js (reprint author), beijing univ sci & technol,beijing 100083,peoples r china
关键词	Accelerated Oxidation Tantalum
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/39175
专题	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.