Influence of different homogenization heat treatments on the microstructure and hot flow stress of the aluminum alloy AA6082

被引:18
作者
Arnoldt, Aurel Ramon [1 ]
Schiffl, Andreas [2 ]
Hoppel, Heinz Werner [3 ]
Oesterreicher, Johannes Albert [1 ]
机构
[1] AIT Austrian Inst Technol, LKR Light Met Technol, Ranshofen, Austria
[2] HAI Hammerer Aluminium Ind Extrus GmbH, Ranshofen, Austria
[3] Friedrich Alexander Univ Erlangen Nurnberg, Inst 1, Dept Mat Sci & Engn, Erlangen, Germany
关键词
Al-Mg-Si; Scanning electron microscopy; In situ DSC; Dispersoids; 6xxx series; Extrusion; MG-SI ALLOYS; COOLING PRECIPITATION DIAGRAMS; BETA-ALFESI; ALPHA-AL(FEMN)SI TRANSFORMATION; ELECTRON-MICROSCOPY; QUENCH SENSITIVITY; MN; DISPERSOIDS; INTERMETALLICS; KINETICS;
D O I
10.1016/j.matchar.2022.112129
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Proper design of the homogenization heat treatment of 6000 series Al wrought alloys is crucial for processes such as hot rolling and extrusion. Important aspects are the precipitation and growth of dispersoids and the dissolution and re-precipitation of Mg-Si-precipitates. Studying these processes is laborious and experimentally demanding, limiting the feasibility of systematic study of variations in the homogenization regime. We conducted in situ differential scanning calorimetry (DSC) experiments of homogenization of AA6082 at different soak temperatures and cooling rates. The resultant heating and cooling curves were interpreted to obtain information on dispersoid number density and Mg-Si-phase dissolution and re-precipitation. Microstructural differences have been evaluated by scanning electron microscopy analysis. The results elucidate the complex relations between dissolution of primary Mg-Si-precipitates, dispersoid precipitation and growth, Mg-Si-re-precipitation, and hot forming behavior while reducing experimental effort compared to semi-industrial furnace trials. Overall, the homogenization soak temperature had the largest influence on these microstructural phenomena while differences due to the cooling rate were less pronounced in an industrially relevant range. In conclusion, in situ DSC can be used as a tool for rapid and inexpensive investigation of homogenization parameters
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页数:11
相关论文
共 38 条
  • [1] The crystal structure of the β" phase in Al-Mg-Si alloys
    Andersen, SJ
    Zandbergen, HW
    Jansen, J
    Traeholt, C
    Tundal, U
    Reiso, O
    [J]. ACTA MATERIALIA, 1998, 46 (09) : 3283 - 3298
  • [2] Optimization of homogenization for a low alloyed AlMgSi alloy
    Birol, Yucel
    [J]. MATERIALS CHARACTERIZATION, 2013, 80 : 69 - 75
  • [3] Callaghan A., 2022, EFFECT MN DISPERSOID
  • [4] Phase relations and precipitation in Al-Mg-Si alloys with Cu additions
    Chakrabarti, DJ
    Laughlin, DE
    [J]. PROGRESS IN MATERIALS SCIENCE, 2004, 49 (3-4) : 389 - 410
  • [5] Dons A.L., 2001, J LIGHT METALS, P133, DOI DOI 10.1016/S1471-5317(01)00007-4
  • [6] Microstructure evolution during homogenization of Al-Mn-Fe-Si alloys: Modeling and experimental results
    Du, Q.
    Poole, W. J.
    Wells, M. A.
    Parson, N. C.
    [J]. ACTA MATERIALIA, 2013, 61 (13) : 4961 - 4973
  • [7] Simulation of the transformation of iron intermetallics during homogenization of 6xxx series extrudable aluminum alloys
    Haidemenopoulos, G. N.
    Kamoutsi, H.
    Zervaki, A. D.
    [J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2012, 212 (11) : 2255 - 2260
  • [8] In situ DSC investigation into the kinetics and microstructure of dispersoid formation in Al-Mn-Fe-Si(-Mg) alloys
    Kemsies, Richard H.
    Milkereit, Benjamin
    Wenner, Sigurd
    Holmestad, Randi
    Kessler, Olaf
    [J]. MATERIALS & DESIGN, 2018, 146 : 96 - 107
  • [9] Effect of Dispersoids on the Microstructure Evolution in Al-Mg-Si Alloys
    Kenyon, Michael
    Robson, Joseph
    Fellowes, Jonathan
    Liang, Zeqin
    [J]. ADVANCED ENGINEERING MATERIALS, 2019, 21 (04)
  • [10] Kuijpers N.C.W., 2004, Kinetics of the -AlFeSi to -Al (FeMn) Si Transformation in Al-Mg-Si Alloys