Effect of rare earth samarium addition on the kinetics of precipitation in Al-Cu-Mn casting alloy

被引：22
作者：
Chen, Zhong-wei [1 ]
Tang, Ming-jun [1 ]
Zhao, Kai [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2014年 / 21卷 / 02期
关键词：
aluminum copper alloys; rare earth additions; samarium; precipitation; kinetics; TRANSFORMATION KINETICS; MECHANICAL-PROPERTIES; DISSOLUTION KINETICS; FRACTURE-BEHAVIOR; PHASE; MICROSTRUCTURES; CRYSTALLIZATION; RATES; DSC; TEM;
D O I：
10.1007/s12613-014-0879-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The mechanical properties of Al-Cu-Mn casting alloy mainly depend on the morphology, distribution, size, and number of theta'(Al2Cu) precipitates. In this study, we have analyzed the effect of rare earth samarium (Sm) addition on the kinetics of precipitation in the Al-Cu-Mn casting alloy by using differential scanning calorimetry (DSC) and high-resolution transmission electron microscopy. Thermal effect peaks that are attributed to the formation and the dissolution of Guinier-Preston (GP) zone and theta' phase were identified from the DSC curves. The activation energy of theta' formation was calculated by using both the Kissinger method and the analytical model, and the corresponding results were compared. Results suggest that the activation energy of theta' formation in Al-Cu-Mn alloy is dramatically higher than that in Al-Cu-Mn-Sm alloy. Accordingly, it is concluded that the addition of rare earth Sm decreases the activation energy of theta' formation and promotes the formation of theta' precipitates.
引用
收藏
页码：155 / 161
页数：7
相关论文
共 25 条
  • [1] Microstructures and fatigue fracture behavior of an Al-Cu-Mg-Ag alloy with addition of rare earth Er
    Bai, Song
    Liu, Zhiyi
    Lia, Yuntao
    Hou, Yanhui
    Chen, Xu
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2010, 527 (7-8): : 1806 - 1814
  • [2] INITIAL REACTION RATES FROM DTA
    BORCHARDT, HJ
    [J]. JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1960, 12 (3-4): : 252 - 254
  • [3] AN ANALYSIS OF FIVEFOLD SYMMETRY BY MICROTWINNING IN RAPIDLY SOLIDIFIED AL-MN ALLOYS
    CARR, MJ
    [J]. JOURNAL OF APPLIED PHYSICS, 1986, 59 (04) : 1063 - 1067
  • [4] METHOD FOR EVALUATING VISCOSITIES OF METALLIC GLASSES FROM RATES OF THERMAL TRANSFORMATIONS
    CHEN, HS
    [J]. JOURNAL OF NON-CRYSTALLINE SOLIDS, 1978, 27 (02) : 257 - 263
  • [5] Microstructures and mechanical properties of Al-Cu-Mn alloy with La and Sm addition
    Chen Zhongwei
    Chen Pei
    Ma Cuiying
    [J]. RARE METALS, 2012, 31 (04) : 332 - 335
  • [6] Effect of Ce addition on microstructure of Al20Cu2Mn3 twin phase in an Al-Cu-Mn casting alloy
    Chen, Zhongwei
    Chen, Pei
    Li, Shishun
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2012, 532 : 606 - 609
  • [7] Study of the developed precipitates in Al-0.63Mg-0.37Si-0.5Cu (wt.%) alloy by using DSC and TEM techniques
    Gaber, A.
    Ali, A. Mossad
    Matsuda, K.
    Kawabata, T.
    Yamazaki, T.
    Ikeno, S.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 432 (1-2) : 149 - 155
  • [8] REACTION KINETICS IN DIFFERENTIAL THERMAL ANALYSIS
    KISSINGER, HE
    [J]. ANALYTICAL CHEMISTRY, 1957, 29 (11) : 1702 - 1706
  • [9] Development of Al-Ti-C grain refiners and study of their grain refining efficiency on Al and Al-7Si alloy
    Kumar, GSV
    Murty, BS
    Chakraborty, M
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2005, 396 (1-2) : 143 - 150
  • [10] Fracture behavior and mechanical properties of high strength aluminum alloys in the as-cast condition
    Lalpoor, M.
    Eskin, D. G.
    Katgerman, L.
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2008, 497 (1-2): : 186 - 194
123