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THERMal CONDUCTIVITY OF al-li alLOY AT CRYOGENIC TEMPERATURES

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中国有色金属学会会刊：英文版 1996年第4期6卷 127-129页

作者： Sun Dongsheng li engzhao Shang Lei(Department of Materials Science and Engineering,Shandong Univesity of Technology,Jinan 250014) Department of Materials Science and Engineering Shandong Univesity of Technology Jinan 250014 China

ＴＨＥＲＭＡＬＣＯＮＤＵＣＴＩＶＩＴＹＯＦＡｌ－ＬｉＡＬＬＯＹＡＴＣＲＹＯＧＥＮＩＣＴＥＭＰＥＲＡＴＵＲＥＳ￥ＳｕｎＤｏｎｇｓｈｅｎｇ；ＬｉＦｅｎｇｚｈａｏ；ＳｈａｎｇＬｅｉ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌ... 详细信息

ＴＨＥＲＭＡＬＣＯＮＤＵＣＴＩＶＩＴＹＯＦＡｌ－ＬｉＡＬＬＯＹＡＴＣＲＹＯＧＥＮＩＣＴＥＭＰＥＲＡＴＵＲＥＳ￥ＳｕｎＤｏｎｇｓｈｅｎｇ；ＬｉＦｅｎｇｚｈａｏ；ＳｈａｎｇＬｅｉ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａｎｄＥｎｇｉｎｅ...

关键词： thermal conductivity al-li alloy cryogenic temperatures

Thermal Stress Analysis of Welded Joint in 1420 al-li alloy Induced by Thermal Cycling

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Journal of Materials Science & Technology 2003年第Z1期19卷 205-208页

作者： Hongbin GENG Song HE Dezhuang YANG Space Materials and Environment Engineering Lab. Harbin Institute of Technology Harbin 150001 China Space Materials and Environment Engineering Lab. Harbin Institute of Technology Harbin 150001 China Space Materials and Environment Engineering Lab. Harbin Institute of Technology Harbin 150001 China

A model of double grains under plane stress state has been established. According to the double grain model, thermal stress induced by thermal cycling in welding fusion zone is numerically simulated by finite element method, and the microstructures before and after thermal cycling are observed. The effect of thermal stress on weld microstructure is discussed. Experimental and analysis results show that the difference between the coefficients of thermal expansion and elastic modulus for grains along different crystal directio n can produce alternate thermal misfit stress and strain near boundaries under thermal cycling. At the temperature of upper and lower limit, thermal stress nearby grain boundary reaches maxima. Thermal stress induced changes in microstructure, which expressed by the sending dislocations from boundaries to matrix, piling up against the boundaries and the increasing of dislocation density.

关键词： Thermal cycling, al-li alloy, Weld, Microstructure, Finite element method

DISLOCATION BEHAVIOR IN THE SUPERPLASTIC DEFORMATION OF alLOY al-li 2091

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中国有色金属学会会刊：英文版 1995年第4期5卷 95-99页

作者： Zeng Meiguang Wu Qiuyun Zhang Baojin Zhang Caibei Cui Jianzhong(P.O.Box 104,Northeastern University,Shenyang 110006) Northeastern Univ Shenyang China

ＤＩＳＬＯＣＡＴＩＯＮＢＥＨＡＶＩＯＲＩＮＴＨＥＳＵＰＥＲＰＬＡＳＴＩＣＤＥＦＯＲＭＡＴＩＯＮＯＦＡＬＬＯＹＡｌ－Ｌｉ２０９１ＺｅｎｇＭｅｉｇｕａｎｇ；ＷｕＱｉｕｙｕｎ；ＺｈａｎｇＢａｏｊｉｎ；ＺｈａｎｇＣａｉｂｅｉ... 详细信息

ＤＩＳＬＯＣＡＴＩＯＮＢＥＨＡＶＩＯＲＩＮＴＨＥＳＵＰＥＲＰＬＡＳＴＩＣＤＥＦＯＲＭＡＴＩＯＮＯＦＡＬＬＯＹＡｌ－Ｌｉ２０９１ＺｅｎｇＭｅｉｇｕａｎｇ；ＷｕＱｉｕｙｕｎ；ＺｈａｎｇＢａｏｊｉｎ；ＺｈａｎｇＣａｉｂｅｉ；ＣｕｉＪｉａｎｚｈｏｎｇ（Ｐ．Ｏ...

关键词： al-li alloy superplastic deformation dislocation behavior

TENSILE FRACURE IN AN al-li alLOY 8090

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中国有色金属学会会刊：英文版 1995年第2期5卷 106-108页

作者： Jiang, Daming Wang,Yinong Hong, Bande Lei, Tingquan(Harbin Institute of Technology, Harbin 150080)Sun Fenglian(Harbin University of Science and Technology, Harbin 150001) Harbin Inst of Technology Harbin China

ＴＥＮＳＩＬＥＦＲＡＣＵＲＥＩＮＡＮＡｌ－ＬｉＡＬＬＯＹ８０９０￥Ｊｉａｎｇ，Ｄａｍｉｎｇ；Ｗａｎｇ，Ｙｉｎｏｎｇ；Ｈｏｎｇ，Ｂａｎｄｅ；Ｌｅｉ，Ｔｉｎｇｑｕａｎ（ＨａｒｂｉｎＩｎｓｔｉｔｕｔｅｏｆＴｅｃｈｎｏｌｏｇ... 详细信息

ＴＥＮＳＩＬＥＦＲＡＣＵＲＥＩＮＡＮＡｌ－ＬｉＡＬＬＯＹ８０９０￥Ｊｉａｎｇ，Ｄａｍｉｎｇ；Ｗａｎｇ，Ｙｉｎｏｎｇ；Ｈｏｎｇ，Ｂａｎｄｅ；Ｌｅｉ，Ｔｉｎｇｑｕａｎ（ＨａｒｂｉｎＩｎｓｔｉｔｕｔｅｏｆＴｅｃｈｎｏｌｏｇｙ，Ｈａｒｂｉｎ１５００８０）Ｓｕ...

关键词： al-li alloy tensile fracture dimple rupture cleavage

Aging behaviors of al-Cu-li-Zr alloy containing Sc

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中国有色金属学会会刊：英文版 2005年第S3期15卷 12-17页

作者：梁文杰潘青林朱朝明何运斌刘元斐 School of Materials Science and Engineering Central South University Changsha 410083 China

Single aging effects on the microstructures and the room-temperature mechanical properties of al-3.5Cu-1.5li-0.22（Sc+Zr） alloy were observed using TEM, tensile test and hardness test at room temperature. The results show that the alloy has the character of aging hardening. The aging temperature and aging time have significant effects on the amount and distribution of the major phase of precipitation and strengthening of the alloy. At both high and low temperatures, the precipitation caused by aging is few and coarse, but at high temperature, the coarse equilibrium phases are visible at grain boundaries, therefore, influencing the composite properties of the alloy. The proper artificial single-aging treatment of the alloy is 160℃, 40h. Under this condition, the alloy obtains homogeneously distributed fine T1 phases, which leads to an optimal mechanical properties, i.e. σb is 483MPa, σ 0.2 is 413MPa, and δ is 8.4% for the alloy. However, extending overaging to 50h at 160℃, the coarse equilibrium phases precipitate at grain boundaries leads to wide precipitates-free zone（PFZ） along the grain boundaries, further results in a decrease in the composite properties of the alloy.

关键词： al-li alloy artificial single-aging treatment microstructures aging behavior

Preparation and Corrosion Resistance of Anodic Oxidation Coatings on 2198 and 5A90 al-li alloys

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Journal of Wuhan University of Technology(Materials Science) 2019年第1期34卷 132-137页

作者：王赫男 li Xinming HE linbo CUI Baolei liU Chunzhong Institute of Materials Science and Engineering Shenyang Aerospace University

2198 and 5A90 al-li alloys were anodized with a constant DC potential in 18%H_2SO_4solution(Solu.A) and the mixture solution of 18%H_2SO_4+5%C_2H_2O_4(Solu.B) at room temperature. 12 and 11 V was optimized as the applied oxidation potential for 2198 and 5A90 alloys, respectively. Cross-sectional morphology, surface morphology and elements distribution of anodic oxidation coatings were observed by scanning electron microscope equipped with energy dispersive X-ray analysis(SEM/EDX). Corrosion resistance was tested by potentiodynamic polarization plot in 3.5%NaCl solution. The results showed that the thicknesses of coatings obtained at the selected potential in Solu.A and Solu.B were about 50 μm/110 μm for 2198 alloy and 80 μm/110 μm for 5A90 alloy. In both solutions, anodic oxidation coatings of 2198 alloy were primarily composed of al oxides; those of 5A90 alloy were mainly consisted of al oxides and a small amount of Mg oxides. The results of potentiodynamic polarization showed that anodic oxidation coatings of 2198 and 5A90 al-li alloys had better corrosion resistances than that of untreated alloys.

关键词： al-li alloy the mixture solution anodic oxidation coating corrosion resistance thickness

EFFECT OF PRECIPITATION HARDENING ON SERRATED FLOW CHARACTERISTICS IN AN al－li alLOY

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中国有色金属学会会刊：英文版 1994年第2期4卷 56-60页

作者： Zheng, Ziqiao liu, Minggui Yin, Denfeng Tan, Cheyu Central South Univ of Technology Changsha China

ＥＦＦＥＣＴＯＦＰＲＥＣＩＰＩＴＡＴＩＯＮＨＡＲＤＥＮＩＮＧＯＮＳＥＲＲＡＴＥＤＦＬＯＷＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＩＮＡＮＡｌ－ＬｉＡＬＬＯＹＥＦＦＥＣＴＯＦＰＲＥＣＩＰＩＴＡＴＩＯＮＨＡＲＤＥＮＩＮＧＯＮＳＥＲ... 详细信息

ＥＦＦＥＣＴＯＦＰＲＥＣＩＰＩＴＡＴＩＯＮＨＡＲＤＥＮＩＮＧＯＮＳＥＲＲＡＴＥＤＦＬＯＷＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＩＮＡＮＡｌ－ＬｉＡＬＬＯＹＥＦＦＥＣＴＯＦＰＲＥＣＩＰＩＴＡＴＩＯＮＨＡＲＤＥＮＩＮＧＯＮＳＥＲＲＡＴＥＤＦＬＯＷＣＨＡＲＡＣＴＥ...

关键词： serrated flow strain aging al-li alloys age hardening

MECHANICal　PROPERTIES　AND　MICROSTRUCTURES　OF　al-Mg-li-Zr　alLOYS-CONTAINING　SILVER

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中国有色金属学会会刊：英文版 1994年第4期4卷 78-82页

作者： Zhang, Siqi Yin, Zhimin Shen, Jian Lu, Bin liang, Ying Central South Univ of Technology Changsha China

ＭＥＣＨＡＮＩＣＡＬＰＲＯＰＥＲＴＩＥＳＡＮＤＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＯＦＡｌ－Ｍｇ－Ｌｉ－ＺｒＡＬＬＯＹＳ－ＣＯＮＴＡＩＮＩＮＧＳＩＬＶＥＲ￥Ｚｈａｎｇ，Ｓｉｑｉ；Ｙｉｎ，Ｚｈｉｍｉｎ；Ｓｈｅｎ，Ｊｉａｎ；Ｌ... 详细信息

ＭＥＣＨＡＮＩＣＡＬＰＲＯＰＥＲＴＩＥＳＡＮＤＭＩＣＲＯＳＴＲＵＣＴＵＲＥＳＯＦＡｌ－Ｍｇ－Ｌｉ－ＺｒＡＬＬＯＹＳ－ＣＯＮＴＡＩＮＩＮＧＳＩＬＶＥＲ￥Ｚｈａｎｇ，Ｓｉｑｉ；Ｙｉｎ，Ｚｈｉｍｉｎ；Ｓｈｅｎ，Ｊｉａｎ；Ｌｕ，Ｂｉｎ；Ｌｉａｎｇ，Ｙｉｎｇ（...

关键词： al-li alloys silver microstructures mechanical properties

DYNAMIC RECRYSTalliZATION AND SUPERPLASTICITY IN al-li alLOY

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中国有色金属学会会刊：英文版 1993年第2期3卷 76-79页

作者： liu,Ziyi Cui,Jianzhong Bai,Guangrun Northeast University of Technology,Shengyang 110006,China

The behavior of dynamic recrystallization in the superplastic deformation of 8090 and 2091 aluminum-lithium alloys have been investigated.TEM observations indicated that dynamic recrystallization occurs at thetriple junction of grain boundaries.The measurement of grain boundary angle showed that recrystallization indynamic equilibrium exists in the process of superplastic deformation of 8090 al-li alloy.It is also indicatedthat,besides the role of refining grains and the grain boundary sliding,dynamic recrystallization playsconcurrently a role of stablizing microstructure.Thus dynamic rccrystallization can be used to induce metalssuperplasticity,which leads to a simplification of pretreatment for superplastic deformation.

关键词： dynamic recrystallization superplasticity al-li alloy mechanism