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,2018,47(10):3167~3172.[Wen Jiafei,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.]
热锻对喷射成形7055铝合金组织性能的影响
投稿时间:2016-12-20  修订日期:2017-02-17
中文关键词:  喷射成形7055铝合金  锻造态  挤压态  显微组织  性能
基金项目:科技部科技型中小企业创新基金(10C 26213201152)*
中文摘要:
      利用喷射成形技术制备了7055高强铝合金。借助拉伸性能测试,电化学工作站、金相显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM) 等手段研究了热锻对挤压合金显微组织和性能的影响。结果表明:挤压合金的纵向抗拉强度达到642 MPa,屈服强度达到598 MPa,而锻造合金的抗拉强度和屈服强度却下降了,但延伸率、电导率和硬度有所上升,断口形貌均体现为韧性断裂;合金的主要元素在晶界和晶内的分布没有明显差别,但有所波动,且锻造后合金元素波动更明显;合金经过时效后晶内都均匀分布着GP区和η'析出相,晶界η析出相则是断续的点状分布,但锻造后晶内析出相粗化,晶界析出相变多;锻造合金的耐蚀性比挤压合金有所提升。
Experiment and Analysis of Forging and Extrusion on microstructure and mechanical properties of spray forming 7055 aluminum alloy
英文关键词:spray forming 7055 aluminum alloy  as-forged  as-extruded  microstructure  property
英文摘要:
      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.
作者单位E-mail
温家飞 中南大学粉末冶金国家重点实验室
江苏豪然喷射成形合金有限公司 
13647009756@163.com 
罗丰华   
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