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MICROSTRUCTURE EVOLUTION AND GROWTH BEHAVIORS OF FACETED PHASE IN DIRECTIONALLY SOLIDIFIED Al-Y ALLOYS II. Microstructure Evolution of Directionally Solidified Al-53%Y Peritectic Alloy
Alternative TitleMICROSTRUCTURE EVOLUTION AND GROWTH BEHAVIORS OF FACETED PHASE IN DIRECTIONALLY SOLIDIFIED Al-Y ALLOYS II. Microstructure Evolution of Directionally Solidified Al-53%YPeritectic Alloy
Liu Tong1; Luo Liangshun1; Zhang Yanning2; Su Yanqing1; Guo Jingjie1; Fu Hengzhi1
2016
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume52Issue:7Pages:866-874
AbstractPeritectic reaction is frequently encountered in many technologically important materials (e.g., steels, brass, bronze, intermetallic compounds, magnetic materials and YBa2Cu3Ox superconductors). Many interesting microstructures have been found during directional solidification of peritectic alloys, which have drawn much attention since last decade. In this work, in order to investigate the growth behavior of Al3Y phase as a peritectic phase, directioanal solidification experiments at different pulling rates have been performed on Al-53%Y (mass fraction) peritectic alloy. The results show that the primary phase and the peritectic phase both grow continuously, the microstructure, which is parallel to the solid-liquid interface has been found and explained at a low pulling rate (V= 1 mu m/s). With the growth distance increase, the precipitating solid phase from the liquid at the quenching solid-liquid interface transforms from primary Al2Y phase to peritectic Al3Y phase. The interface consists of coarse Al3Y phase without Al2Y phase. At relatively high pulling rates, the morphologies of primary Al2Y phase transit from continuous growth to cellular phase, and further to dendrites with the pulling rate increase. The results also show that the primary phase is enclosed with the serrate peritectic phase, and Al3Y phase precipitates from the liquid in needle shape at the same time. With the growth distance further increase, Al3Y phase become thicker and more numerous. In addition, the Al3Y phase precipitated from liquid transit from needle shape to short rod and lump shape, which distributes around the peritectic structure.
KeywordSTRUCTURE FORMATION MECHANISM IN-SITU OBSERVATION COUPLED GROWTH SELECTION SYSTEMS Al-Y peritectic alloy directional solidification intermetallics compound faceted growth
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China]
CSCD IDCSCD:5741688
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/146289
Collection中国科学院金属研究所
Affiliation1.Harbin Institute Technol, Natl Key Lab Precis Hot Proc Met, Harbin 150001, Peoples R China
2.中国科学院金属研究所
Recommended Citation
GB/T 7714
Liu Tong,Luo Liangshun,Zhang Yanning,et al. MICROSTRUCTURE EVOLUTION AND GROWTH BEHAVIORS OF FACETED PHASE IN DIRECTIONALLY SOLIDIFIED Al-Y ALLOYS II. Microstructure Evolution of Directionally Solidified Al-53%Y Peritectic Alloy[J]. ACTA METALLURGICA SINICA,2016,52(7):866-874.
APA Liu Tong,Luo Liangshun,Zhang Yanning,Su Yanqing,Guo Jingjie,&Fu Hengzhi.(2016).MICROSTRUCTURE EVOLUTION AND GROWTH BEHAVIORS OF FACETED PHASE IN DIRECTIONALLY SOLIDIFIED Al-Y ALLOYS II. Microstructure Evolution of Directionally Solidified Al-53%Y Peritectic Alloy.ACTA METALLURGICA SINICA,52(7),866-874.
MLA Liu Tong,et al."MICROSTRUCTURE EVOLUTION AND GROWTH BEHAVIORS OF FACETED PHASE IN DIRECTIONALLY SOLIDIFIED Al-Y ALLOYS II. Microstructure Evolution of Directionally Solidified Al-53%Y Peritectic Alloy".ACTA METALLURGICA SINICA 52.7(2016):866-874.
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