A HIGH-RESOLUTION-ELECTRON-MICROSCOPY STUDY OF A GAMMA/GAMMA'-ALPHA DIRECTIONALLY SOLIDIFIED EUTECTIC ALLOY .2. AS-AGING TREATMENT

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	A HIGH-RESOLUTION-ELECTRON-MICROSCOPY STUDY OF A GAMMA/GAMMA'-ALPHA DIRECTIONALLY SOLIDIFIED EUTECTIC ALLOY .2. AS-AGING TREATMENT
	J. Y. Dai; D. X. Li; H. Q. Ye; Z. X. Jin; J. H. Zhang
	1995
发表期刊	Journal of Materials Science
ISSN	0022-2461
卷号	30 期号:1 页码:253-257
摘要	A master alloy with eutectic compositions of Ni-30.26Mo-6.08Al-1.43 V (wt%) has been directionally solidified (DS) into gamma/gamma'-alpha alloy. The microstructural as-ageing treatment was studied by means of high resolution electron microscopy (HREM). A majority of alpha fibres still display the Bain orientation relationship with the gamma'/gamma matrix. In a few cases, however, the so-called Nishiyama-Wasserman (NW) orientation relationship is found in specimens aged at 850 degrees C for 2000 h. Different microdomain structures of the gamma phase, corresponding to different ageing temperatures, were revealed. Orthorhombic Ni3Mo phase, with a size of tens of nanometres, was found to precipitate inside alpha fibres after ageing at both 850 and 650 degrees C. Occasionally, an gamma'-Ni3Al phase with lamellar twin structure was also found to coexist with Ni3Mo precipitate inside the alpha fibres. The orientation relationships between the precipitates and the alpha fibres were determined. Energy dispersive X-ray analysis (EDX) showed that the precipitation of Ni3Mo and Ni3Al is due to solid solution of Ni and Al in the alpha fibres.
部门归属	dai, jy (reprint author), acad sinica,inst met res,atom imaging solids lab,shenyang 110015,peoples r china
关键词	Ni-al-mo Aligned Eutectics Phase-equilibria System
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38546
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Y. Dai,D. X. Li,H. Q. Ye,et al. A HIGH-RESOLUTION-ELECTRON-MICROSCOPY STUDY OF A GAMMA/GAMMA'-ALPHA DIRECTIONALLY SOLIDIFIED EUTECTIC ALLOY .2. AS-AGING TREATMENT[J]. Journal of Materials Science,1995,30(1):253-257.
APA	J. Y. Dai,D. X. Li,H. Q. Ye,Z. X. Jin,&J. H. Zhang.(1995).A HIGH-RESOLUTION-ELECTRON-MICROSCOPY STUDY OF A GAMMA/GAMMA'-ALPHA DIRECTIONALLY SOLIDIFIED EUTECTIC ALLOY .2. AS-AGING TREATMENT.Journal of Materials Science,30(1),253-257.
MLA	J. Y. Dai,et al."A HIGH-RESOLUTION-ELECTRON-MICROSCOPY STUDY OF A GAMMA/GAMMA'-ALPHA DIRECTIONALLY SOLIDIFIED EUTECTIC ALLOY .2. AS-AGING TREATMENT".Journal of Materials Science 30.1(1995):253-257.