邵勇,赵鹏飞,刘启航,郭平义,石凤健,杨宏宇,严林,杨娜.7055-T7951铝合金热轧厚板微观组织及非均匀力学行为研究[J].稀有金属材料与工程,2020,49(12):4199~4206.[Shao Yong,Zhao Pengfei,Liu Qihang,Guo Pingyi,Shi Fengjian,Yang Hongyu,Yan Lin,Yang Na.Research on microstructure and tensile property inhomogeneity of a commercial 7055-T7951 aluminum alloy thick plate by hot rolling[J].Rare Metal Materials and Engineering,2020,49(12):4199~4206.]
7055-T7951铝合金热轧厚板微观组织及非均匀力学行为研究
投稿时间:2020-04-15  修订日期:2020-06-04
中文关键词:  7055铝合金  T7951热处理  织构  热轧厚板  各向异性
基金项目:国家自然科学基金资助(项目号51701086)
中文摘要:
      本文对工业级7055-T7951铝合金热轧厚板的合金成分、室温拉伸性能、显微组织以及织构特征等进行了实验分析,对该板材的微观组织状态、力学性能各向异性与织构特征关系进行了详细研究,结果表明:该板材镁元素含量总体处于下限水平,难溶的合金化合物很少,晶内的析出相主要为h'相和少量的h相,材料处于轻微过时效状态。板材存在明显的力学性能各向异性,沿轧制方向及横向的屈服及抗拉强度相近且明显优于与轧制方向呈45°方向上的指标。板材中心层各方位上的强度指标均优于表层对应方位上的指标,并且中心层的力学性能各向异性强于表层。该板材中心层有较为强烈的轧制类织构Brass和S,而表层则是以再结晶织构R为主。基于施密特定律研究了板材不同厚度层不同拉伸方向上平均屈服强度与施密特因子间的定性关系,探讨了织构特征对热轧厚板非均匀力学行为的影响规律。
Research on microstructure and tensile property inhomogeneity of a commercial 7055-T7951 aluminum alloy thick plate by hot rolling
英文关键词:7055 aluminum alloy  T7951 heat treatment  Texture  Hot rolling thick plate  Mechanical anisotropy
英文摘要:
      An experimental research of a commercial hot rolled 7055-T7951 aluminum alloy thick plate on composition, microstructure details, uniaxial tensile properties at room temperature, and texture feature was carried out. Especially, a quantitative analysis for texture feature as well as their influences on the mechanical anisotropy was investigated carefully. The results show that there are little undissolved alloy compounds existed in the microstructure of this plate, possibly due to a low level of magnesium. The precipitations in grains mainly consist of η'and η phases, which indicates a slight overaged status for the material. The uniaxial tensile properties along the 0°and the 90°to the rolling direction of the plate are almost equal and both superior to that along the 45°to the rolling direction. In addition, the strength indicators in central layer of the plate are all superior to corresponding parts in surface layer, and the tensile mechanical property anisotropy in central layer is more intense than that in surface layer. The texture near the center of the plate mainly consist of rolling type of Brass and S. While, the texture R with recrystallization type is dominant near the surface. The mean yield strengths along different in-plane directions through the thickness were studied and compared based on the Schmid’s law. The relationship between texture characterization and the nonuniformity of mechanical behavior was discussed finally.
作者单位E-mail
邵勇 江苏科技大学 shy782004@163.com 
赵鹏飞 江苏科技大学  
刘启航 江苏科技大学  
郭平义 江苏科技大学  
石凤健 江苏科技大学  
杨宏宇 江苏科技大学  
严林 江苏科技大学  
杨娜 江苏科技大学  
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