Effect of Ho additions on the microstructure and mechanical properties of Nb-22Ti-16Si-7Cr-3Al-3Ta-2Hf alloys

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	Effect of Ho additions on the microstructure and mechanical properties of Nb-22Ti-16Si-7Cr-3Al-3Ta-2Hf alloys
	Y. X. Tian; J. T. Guo; Y. C. Liang; C. L. Wu; L. Z. Zhou; H. Q. Ye
	2007
发表期刊	International Journal of Materials Research
ISSN	1862-5282
卷号	98 期号:6 页码:511-515
摘要	The effect of Ho additions on the microstructure and compressive properties of the alloy Nb-22Ti-16Si-7Cr-3Al-3Ta-2Hf (at.%) was investigated by using scanning electron microscopy, X-ray diffraction, transmission electron microscopy and by performing compression tests. The results show that Ho additions cause remarkable microstructural refinement. The addition of 0.1 at.% Ho to the alloy increases its strength and ductility. When the amount of Ho is increased to 0.2 at.%, the strength and ductility decreases. Ho addition inhibits the formation of the (Ti, Nb)(5)Si-3 phase and the amount of the (Ti, Nb)(5)Si-3 phase decreases. even disappears, with increasing Ho content. In addition, the fracture surfaces of Ho-free alloys deformed at room temperature in compression tests exhibit cleavage for both the (Nb, Ti) solid solution and the (Nb, Ti)(5)Si-3 intermetallic compound, while limited local plastic strain of the (Nb, Ti) solid solution is observed in Ho-doped alloys. The effect and mechanism of strengthening and plastic deformation of Ho additions to the alloy was discussed in view of the microstructure.
部门归属	chinese acad sci, inst met res, superalloy div, shenyang 110016, peoples r china.;guo, jt (reprint author), chinese acad sci, inst met res, superalloy div, 72 wenhua rd, shenyang 110016, peoples r china;jtguo@imr.ac.cn
关键词	Nb5si3 Microstructure Mechanical Properties Ho In-situ Composites Temperature Fracture-toughness Solid-solution Crack-growth Cr Additions Nb Mo Strength Ti Al
URL	查看原文
WOS记录号	WOS:000247623300010
引用统计	被引频次：12[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/321006/33838
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. X. Tian,J. T. Guo,Y. C. Liang,et al. Effect of Ho additions on the microstructure and mechanical properties of Nb-22Ti-16Si-7Cr-3Al-3Ta-2Hf alloys[J]. International Journal of Materials Research,2007,98(6):511-515.
APA	Y. X. Tian,J. T. Guo,Y. C. Liang,C. L. Wu,L. Z. Zhou,&H. Q. Ye.(2007).Effect of Ho additions on the microstructure and mechanical properties of Nb-22Ti-16Si-7Cr-3Al-3Ta-2Hf alloys.International Journal of Materials Research,98(6),511-515.
MLA	Y. X. Tian,et al."Effect of Ho additions on the microstructure and mechanical properties of Nb-22Ti-16Si-7Cr-3Al-3Ta-2Hf alloys".International Journal of Materials Research 98.6(2007):511-515.