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温家飞,罗丰华.热锻对喷射成形7055铝合金组织性能的影响[J].稀有金属材料与工程(英文),2018,47(10):3167~3172.[Wen Jiafei and Luo Fenghua.Experiment and Analysis of Forging and Extrusion on microstructure and mechanical properties of spray forming 7055 aluminum alloy[J].Rare Metal Materials and Engineering,2018,47(10):3167~3172.]
Experiment and Analysis of Forging and Extrusion on microstructure and mechanical properties of spray forming 7055 aluminum alloy
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Received:December 20, 2016  Revised:February 17, 2017
DOI:
Key words: spray forming 7055 aluminum alloy  as-forged  as-extruded  microstructure  property
Foundation item:科技部科技型中小企业创新基金(10C 26213201152)*
Author NameAffiliation
Wen Jiafei and Luo Fenghua  
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Abstract:
      High strength 7055 aluminum alloy were produced by spray forming. The microstructures and properties of alloy after forging and extrusion were investigated using tensile test, electrochemical workstation, OM, SEM, TEM. The results indicate that the corrosion –resistance of extruded aluminum alloy is superior to forged aluminum alloy; at room temperature, the tensile strength of the extruded alloy can reach 642 MPa, the yield strength can reach to 574 MPa, the tensile strength and yield strength of the forged alloy decrease, but the elongation、electrical conductivity and hardness have increased, the alloys both exhibit a ductile fracture; element distribution of the alloys in the grain boundary and grain interior is no difference, but have small fluctuation, and this phenomenon is more apparent under the forged alloy; in T74 condition the main precipitates are GP zones and η′ phase in the matrix, and the grain boundary precipitates distribute interrupted,precipitated phases of grain boundary of the forged alloy is more than that of the extruded alloy, but precipitated phases of grain interior have coarsened.