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Effect of Cr and Mn Addition on Microstructure Evolution and Tensile Properties of High Nb-TiAl Alloy
Alternative TitleEffect of Cr and Mn Addition on Microstructure Evolution and Tensile Properties of High Nb-TiAl Alloy
Yang Liang1; Xin Jingjing1; Zhang Youwei2; Bao Chunling2; Zhang Laiqi1; Lin Junpin1
2017
Source PublicationRARE METAL MATERIALS AND ENGINEERING
ISSN1002-185X
Volume46Issue:10Pages:3005-3010
AbstractThe 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.
KeywordBETA-PHASE GAMMA DEFORMATION ELEMENTS beta solidification beta-gamma high Nb-TiAl alloy microstructure evolution tensile properties Cr and Mn
Indexed ByCSCD
Language英语
CSCD IDCSCD:6093902
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/144546
Collection中国科学院金属研究所
Affiliation1.中国科学技术大学
2.中国科学院金属研究所
Recommended Citation
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.
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