HIGH-TEMPERATURE X-RAY-DIFFRACTION INVESTIGATION OF NICKEL-RICH NIAL AND NIAL-TIB2

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	HIGH-TEMPERATURE X-RAY-DIFFRACTION INVESTIGATION OF NICKEL-RICH NIAL AND NIAL-TIB2; HIGH-TEMPERATURE X-RAY-DIFFRACTION INVESTIGATION OF NICKEL-RICH NIAL AND NIAL-TIB2
	T. Y. Cheng; H. M. Flower
	1994 ; 1994
发表期刊	Acta Metallurgica Et Materialia ; Acta Metallurgica Et Materialia
ISSN	0956-7151 ; 0956-7151
卷号	42 期号:4 页码:1399-1405
摘要	A high temperature X-ray diffraction investigation of Ni-19.5wt%(34.6 at.%)Al and Ni-20.2 wt%Al-0.9 wt%TiB2 between room temperature and 1200-degrees-C was carried out. It was found that the NiAl martensite in the alloy retransformed into beta-NiAl first below 410-degrees-C during heating then beta-NiAl transformed into the stable Ni5Al3 between 480 and 850-degrees-C, which is much easier than that in isothermal ageing as reported previously. The Ni5Al3 was retained at least until 850-degrees-C which is higher than indicated in the Ni-Al phase diagram (700-degrees-C) before transforming into the gamma'-Ni33Al and beta-NiAl. Adding small amount (0.9 wt%) of TiB2 and increasing by a small amount (0.7 wt%) of the aluminium content led to obvious effects on transformations of Ni-19.5 wt%Al during heating. No obvious change related to TiB2 in the NiAl-TiB2 was found during the heat cycle and holding. Moreover, the ordered structure of NiAl was retained at least up to 1200-degrees-C.; A high temperature X-ray diffraction investigation of Ni-19.5wt%(34.6 at.%)Al and Ni-20.2 wt%Al-0.9 wt%TiB2 between room temperature and 1200-degrees-C was carried out. It was found that the NiAl martensite in the alloy retransformed into beta-NiAl first below 410-degrees-C during heating then beta-NiAl transformed into the stable Ni5Al3 between 480 and 850-degrees-C, which is much easier than that in isothermal ageing as reported previously. The Ni5Al3 was retained at least until 850-degrees-C which is higher than indicated in the Ni-Al phase diagram (700-degrees-C) before transforming into the gamma'-Ni33Al and beta-NiAl. Adding small amount (0.9 wt%) of TiB2 and increasing by a small amount (0.7 wt%) of the aluminium content led to obvious effects on transformations of Ni-19.5 wt%Al during heating. No obvious change related to TiB2 in the NiAl-TiB2 was found during the heat cycle and holding. Moreover, the ordered structure of NiAl was retained at least up to 1200-degrees-C.
部门归属	acad sinica, int ctr mat phys, shenyang 110015, peoples r china. univ london imperial coll sci technol & med, dept mat, london sw7 2bp, england.;cheng, ty (reprint author), beijing inst technol, met mat sect, pob 327, beijing 100081, peoples r china ; acad sinica, int ctr mat phys, shenyang 110015, peoples r china. univ london imperial coll sci technol & med, dept mat, london sw7 2bp, england.;cheng, ty (reprint author), beijing inst technol, met mat sect, pob 327, beijing 100081, peoples r china
关键词	Mechanical-properties Mechanical-properties Alloys Alloys Microstructure Microstructure
URL	查看原文 ; 查看原文
WOS记录号	WOS:A1994NA12500036 ; WOS:A1994NA12500036
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38801
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	T. Y. Cheng,H. M. Flower. HIGH-TEMPERATURE X-RAY-DIFFRACTION INVESTIGATION OF NICKEL-RICH NIAL AND NIAL-TIB2, HIGH-TEMPERATURE X-RAY-DIFFRACTION INVESTIGATION OF NICKEL-RICH NIAL AND NIAL-TIB2[J]. Acta Metallurgica Et Materialia, Acta Metallurgica Et Materialia,1994, 1994,42, 42(4):1399-1405, 1399-1405.
APA	T. Y. Cheng,&H. M. Flower.(1994).HIGH-TEMPERATURE X-RAY-DIFFRACTION INVESTIGATION OF NICKEL-RICH NIAL AND NIAL-TIB2.Acta Metallurgica Et Materialia,42(4),1399-1405.
MLA	T. Y. Cheng,et al."HIGH-TEMPERATURE X-RAY-DIFFRACTION INVESTIGATION OF NICKEL-RICH NIAL AND NIAL-TIB2".Acta Metallurgica Et Materialia 42.4(1994):1399-1405.