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EFFECTS　OF　THREE　DIMENSIONAL　DIRECTION　OF　SECOND　DENDRITE　ON　COMPETITIVE　GRAIN　GROWTH　IN　DD8　SUPERALLOY

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中国有色金属学会会刊：英文版 1996年第2期6卷 111-116页

作者： Liu Zhiyi wei Pengyi fu hengzhi({3. key Lab of solidification processing,northwestern polytechnical University , xi′an 710072) northwestern POLYTECH UNIV STATE KEY LAB SOLIDIFICAT PROCXIAN 710072PEOPLES R CHINA

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ＥＦＦＥＣＴＳＯＦＴＨＲＥＥＤＩＭＥＮＳＩＯＮＡＬＤＩＲＥＣＴＩＯＮＯＦＳＥＣＯＮＤＤＥＮＤＲＩＴＥＯＮＣＯＭＰＥＴＩＴＩＶＥＧＲＡＩＮＧＲＯＷＴＨＩＮＤＤ８ＳＵＰＥＲＡＬＬＯＹＬｉｕＺｈｉｙｉ；ＷｅｉＰｅｎｇｙｉ；ＦｕＨｅｎｇｚｈｉ（ＳｔａｔｅＫｅ...

关键词： second dendrite nickel base superalloy three dimensional direction competitive grain growth

Characteristics of S/L Interface Evolution during High Rate Directional solidification

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Journal of Materials Science & Technology 2001年第3期17卷 299-302页

作者： hengzhi fu and xingguo GENG state{3. laboratory of solidification processing, northwestern polytechnical University, xi’an 710072, china E-mail: fhzh@*** northwestern Polytech Univ State Key Lab Solidificat Proc Xian 710072 Peoples R China

The present paper aims to the characterization of high rate direction solidification on AI-Mn and AI-Cu alloys. It is indicated that the relevant cooling rate of high rate directional solidification is defined within 10(0)similar to 10(3. K/s that is located in the region between near-equilibrium slow growth rate and rapid solidification rate beyond equilibrium condition, and at the meantime there occurred a series of turning effect of interface stability and morphologies. With the increase of growth velocity the interface with planar front evolved to cells and dendrites at the stage of near-equilibrium and with {3.rther increase of growth rate they transformed reversely from dendrites to cell structure and then to absolute stability of planar interface. An explanation based on effective constitutional supercooling about the evolution of interface morphologies with the change of growth rate was proposed.

关键词： rate

Microstructure Characteristics of Ni-Nb Near Eutectic Alloy during EBFZM Directional solidification

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Journal of Materials Science & Technology 2001年第1期17卷 97-98页

作者： Jinjiang YU Jun ZHANG and hengzhi fu state {3. laboratory of solidification processing, northwestern polytechnical University, xi’an 710072, china Jinchen ZHAO General Research institute for iron & Steel, Beijing 100081, china northwestern Polytech Univ State Key Lab Solidificat Proc Xian 710072 Peoples R China Gen Res Inst Iron & Steel Beijing 100081 Peoples R China

Microstructure Characteristic of Ni-Nb near eutectic alloy is systematically investigated during directional solidification with electron beam floating zone melting (EBFZM). The effect of the Zone melting rate on the ... 详细信息

关键词： Ni Microstructure Characteristics of Ni-Nb Near Eutectic Alloy during EBFZM Directional solidification

Dendrite morphology and evolution mechanism of nickel-based single crystal superalloys grown along the<001>and<011>orientations

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Progress in Natural Science:Materials International 2012年第5期22卷 407-413页

作者： Chubin Yang,Lin Liu n,xinbao Zhao,Yafeng Li,Jun Zhang,hengzhi fu state {3. laboratory of solidification processing,northwestern polytechnical University,xi’an 710072,china state key laboratory of {3. processing Northwestern Polytechnical University Xi'an 710072 China

Nickel-based single crystal superalloys oriented along the and lattice directions were produced by a bottom seeding technique in an attempt to understand the evolution mechanism of the dendrite grown along different orientations in the present *** changes in primary dendrite arm spacing for single crystal with different orientations are also *** was found that the dendrite morphologies of single crystal superalloy grown along were different from that of .Firstly,the dendrites showed the irregular cruciforms and array in rows in a transverse ***,no typical primary dendrites were observed but the dendrite morphologies appeared like the letter "V" or "W" in a longitudinal *** primary dendrite arms grew along the orientation from the bottom of the sample in the ***,in the orientation,the single crystal developed by continuous side-branching along the [001] and [010] *** primary dendrite arm spacing was as the function of the deviation angle φ.It indicates that with the increase in the deviation angle φ,the primary dendrite arm spacing first increased,and then decreased.

关键词： Dendrite morphology Directional solidification Single crystal superalloy Crystal orientation

Crystallization Growth of Single Crystal Cu by Continuous Casting

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Journal of Materials Science & Technology 2000年第3期16卷 345-347页

作者： Zhenming XU and Jianguo LI (School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 20003., china) hengzhi fu ({3. key laboratory of solidification processing, northwestern polytechnical University, xi’an 710072, china) School of Materials Science and Engineering Shanghai Jiaotong University Shanghai 200030 China state key laboratory of {3. processing Northwestern Polytechnical University Xi'an 710072 China

Crystallization growth of single-crystal Cu by continuous casting has been investigated using self-designed horizontal continuous casting equipment and XRD. Experimental results showed that the crystallization plane of (3.1), (220) and (ill) were eliminated sequentially in evolutionary process. The final growth plane of crystal was (200), the direction of crystallization was [100], the growth direction of both sides of the rod inclined to axis, and the degree of deviation of direction [100] from the crystal axis was less than 10°. In order to produce high quality single crystal, the solid-liquid interface morphology must be smooth, even be planar.

关键词： Crystallization Growth of Single Crystal Cu by Continuous Casting Cu

Thermodynamic Analysis on Interaction between Molten Ti Alloys and Oxide Molding Materials

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Journal of Materials Science & Technology 2001年第1期17卷 99-100页

作者： Hongsheng DING Jun JIA Jingiie GUO and Yanqing SU National key laboratory of Precision Hot processing of Metals, Harbin 150001,{3. hengzhi fu and Jinshan LI state key laboratory of solidification processing, northwestern polytechnical University, xi’ Harbin Inst. of Technol. Harbin 150001 China

A thermodynamic model has been built up for the interactions between molten Ti alloys and oxide molding materials in the way of decomposition and solution of molding materials, then the influences on the reaction free... 详细信息

关键词： Ti Thermodynamic Analysis on Interaction between Molten Ti Alloys and Oxide Molding Materials

solidification AND MICROSEGREGATION BEHAVIORS OF NICKEL-BASE SINGLE CRYSTAL SUPERALLOY SOLIDIFIED AT MEDIUM COOLING RATE

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中国有色金属学会会刊：英文版 1998年第1期8卷 84-88页

作者： du wei, Li Jianguo and fu {3.state key laboratory of solidification processing,northwestern polytechnical University, xi′an 710072, P. R. china

ＳＯＬＩＤＩＦＩＣＡＴＩＯＮＡＮＤＭＩＣＲＯＳＥＧＲＥＧＡＴＩＯＮＢＥＨＡＶＩＯＲＳＯＦＮＩＣＫＥＬＢＡＳＥＳＩＮＧＬＥＣＲＹＳＴＡＬＳＵＰＥＲＡＬＬＯＹＳＯＬＩＤＩＦＩＥＤＡＴＭＥＤＩＵＭＣＯＯＬＩＮＧＲＡＴＥ①... 详细信息

ＳＯＬＩＤＩＦＩＣＡＴＩＯＮＡＮＤＭＩＣＲＯＳＥＧＲＥＧＡＴＩＯＮＢＥＨＡＶＩＯＲＳＯＦＮＩＣＫＥＬＢＡＳＥＳＩＮＧＬＥＣＲＹＳＴＡＬＳＵＰＥＲＡＬＬＯＹＳＯＬＩＤＩＦＩＥＤＡＴＭＥＤＩＵＭＣＯＯＬＩＮＧＲＡＴＥ①ＤｕＷｅｉ，ＬｉＪｉａｎｇｕｏａｎ...

关键词： single crystal superalloy cooling rate microstructure microsegregation

PREPARATION　OF　Al－Si　INGOTS　WITH　fuLL　EUTECTIC－LIKE　MICROSTRUCTURE　AT　LOW　COOLING　RATE

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Acta Metallurgica Sinica(English Letters) 1996年第1期9卷 49-55页

作者： wei Pengyi fu hengzhi({3. key laboratory of solidification processing,northwestern polytechnical University,xi’an 710072,china) W.REIF(Institute fuer Metallforshung-Metallkunde,Technische Universitaete Berlin,Strasse des 17 Juni 13.,D-1000 Berlin 12,Ger northwestern polytechnical Univ Xi'an China

A self-designed computer-aided solidification simulation system for large-size ingots was employed to determine the eutectic coupled-zone of Al-(7-14 wt%) Si alloys at low freezing rate with a temperature gradient of liquid on solidification interface tower than 20 K cm￣(-1). Experimental parameters for the formation of a fully eutectic microstructure in a dia.3.×70 mm ingot have been successfully obtained under various conditions for Al-(11.3.-13.0 wt%) Si *** coupled growth charactersitics under this condition was also discussed.

关键词： Al-Si alloy eutectic-like microstructure solidification simulation coupled-zone

CONTINUOUS CASTING TECHNOLOGY OF SINGLE CRYSTAL COPPER ROD

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中国有色金属学会会刊：英文版 1998年第2期8卷 102-107页

作者： Xu Zhengming, Li Jianguo and fu hengzhistate {3. laboratory of solidification processing, northwestern polytechnical University, xi’an 710072, P. R. china

ＣＯＮＴＩＮＵＯＵＳＣＡＳＴＩＮＧＴＥＣＨＮＯＬＯＧＹＯＦＳＩＮＧＬＥＣＲＹＳＴＡＬＣＯＰＰＥＲＲＯＤ①ＸｕＺｈｅｎｇｍｉｎｇ，ＬｉＪｉａｎｇｕｏａｎｄＦｕＨｅｎｇｚｈｉＳｔａｔｅＫｅｙＬａｂｏｒａｔｏｒｙｏｆＳｏｌ... 详细信息

ＣＯＮＴＩＮＵＯＵＳＣＡＳＴＩＮＧＴＥＣＨＮＯＬＯＧＹＯＦＳＩＮＧＬＥＣＲＹＳＴＡＬＣＯＰＰＥＲＲＯＤ①ＸｕＺｈｅｎｇｍｉｎｇ，ＬｉＪｉａｎｇｕｏａｎｄＦｕＨｅｎｇｚｈｉＳｔａｔｅＫｅｙＬａｂｏｒａｔｏｒｙｏｆＳｏｌｉｄｉｆｉｃａｔｉｏｎＰｒｏｃｅｓ...

关键词： single crystal copper rod continuous casting mechanical properties