Effect of growth rate on microstructure and mechanical properties in a directionally solidified Nb-silicide base alloy

IMR OpenIR

	Effect of growth rate on microstructure and mechanical properties in a directionally solidified Nb-silicide base alloy
	Y. X. Tian; J. T. Guo; G. M. Cheng; L. Y. Sheng; L. Z. Zhou; L. L. He; H. Q. Ye
	2009
发表期刊	Materials & Design
ISSN	0261-3069
卷号	30 期号:6 页码:2274-2277
摘要	The ingots with the composition of Nb-22Ti-16Si-7Cr-3Al-3Ta-2Hf-0.1Ho (at.%) have been successfully fabricated by using directional solidification, and the microstructure and mechanical properties of the resulted ingots were investigated as a function of growth rate. It is found that with the increase of growth rate the microstructure becomes finer, which can be characterized by the decreased average cell size, intercellular boundary width and interphase spacing. However, in the meanwhile more discontinuous Nb-silicides columns appear at high growth rate, and this will counteract the improvement of yield strength from the refined microstructure. In addition, the refinement of Nbss plates with increasing growth rate is unfavorable to the enhancement of fracture toughness. (C) 2008 Elsevier Ltd. All rights reserved.
部门归属	[tian, y. x.; guo, j. t.; cheng, g. m.; sheng, l. y.; zhou, l. z.; he, l. l.; ye, h. q.] chinese acad sci, inst met res, shenyang 110016, peoples r china. [tian, y. x.] bao shan iron & steel co ltd, baosteel res inst, shanghai 201900, peoples r china. [tian, y. x.] shanghai jiao tong univ, shanghai 200030, peoples r china.;guo, jt (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;jtguo@imr.ac.cn
关键词	High-temperature Strength In-situ Composites Mo Eutectic Alloy Fracture-toughness Behavior
URL	查看原文
WOS记录号	WOS:000265669100054
引用统计	被引频次：30[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/321006/32332
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,G. M. Cheng,et al. Effect of growth rate on microstructure and mechanical properties in a directionally solidified Nb-silicide base alloy[J]. Materials & Design,2009,30(6):2274-2277.
APA	Y. X. Tian.,J. T. Guo.,G. M. Cheng.,L. Y. Sheng.,L. Z. Zhou.,...&H. Q. Ye.(2009).Effect of growth rate on microstructure and mechanical properties in a directionally solidified Nb-silicide base alloy.Materials & Design,30(6),2274-2277.
MLA	Y. X. Tian,et al."Effect of growth rate on microstructure and mechanical properties in a directionally solidified Nb-silicide base alloy".Materials & Design 30.6(2009):2274-2277.