Effect of Cr and Mn Addition on Microstructure Evolution and Tensile Properties of High Nb-TiAl Alloy

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	Effect of Cr and Mn Addition on Microstructure Evolution and Tensile Properties of High Nb-TiAl Alloy
	Yang Liang 1; Xin Jingjing 1; Zhang Youwei 2; Bao Chunling 2; Zhang Laiqi 1; Lin Junpin 1
刊名	RARE METAL MATERIALS AND ENGINEERING
	2017
卷号	46 期号:10 页码:3005-3010
关键词	BETA-PHASE GAMMA DEFORMATION ELEMENTS beta solidification beta-gamma high Nb-TiAl alloy microstructure evolution tensile properties Cr and Mn
ISSN号	1002-185X
其他题名	Effect of Cr and Mn Addition on Microstructure Evolution and Tensile Properties of High Nb-TiAl Alloy
英文摘要	The variation of microstructure evolution, phase composition, solidification path and tensile properties of high Nb-TiAl alloys alloyed with fi stable elements Cr or/and Mn were studied. The results show that volume fraction of B2 phase gradually increases while alpha(2) phase gradually decreases in as-cast microstructures of Ti-45Al-8Nb-0.4B (atom fraction, %, similarly hereinafter) alloyed by 2Cr, 2Mn and ICrlMn. ICrlMn alloy turns into the novel beta-gamma high Nb-TiAl alloy, which is composed of gamma and B2 two phases rather than gamma, alpha(2) and B2 three phases. The solidification path changes from L ->beta+alpha ->alpha+gamma+beta ->alpha(2)+gamma+B2 to L ->beta ->beta+gamma -> B2+gamma. The co-addition of Cr and Mn has more obvious beta stable ability. The room temperature tensile results reveal that with the increase of B2 phase, the strength and elongation both decrease. While the elongation decreases firstly and increases subsequently at 900 degrees C. This phenomenon indicates that when the beta phase content reaches a certain level, which is 14.4% in this study, beta phase is advantageous to deformation at high temperature.
语种	英语
CSCD记录号	CSCD:6093902
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/144545]
专题	金属研究所_中国科学院金属研究所
作者单位	1.中国科学技术大学 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	Yang Liang,Xin Jingjing,Zhang Youwei,et al. Effect of Cr and Mn Addition on Microstructure Evolution and Tensile Properties of High Nb-TiAl Alloy[J]. RARE METAL MATERIALS AND ENGINEERING,2017,46(10):3005-3010.
APA	Yang Liang,Xin Jingjing,Zhang Youwei,Bao Chunling,Zhang Laiqi,&Lin Junpin.(2017).Effect of Cr and Mn Addition on Microstructure Evolution and Tensile Properties of High Nb-TiAl Alloy.RARE METAL MATERIALS AND ENGINEERING,46(10),3005-3010.
MLA	Yang Liang,et al."Effect of Cr and Mn Addition on Microstructure Evolution and Tensile Properties of High Nb-TiAl Alloy".RARE METAL MATERIALS AND ENGINEERING 46.10(2017):3005-3010.