杨栋,陈文琳,王少阳,周瑞,李亨

• 1:合肥工业大学材料科学与工程学院
• 2:成都飞机工业(集团)有限责任公司

摘要(Abstract)：

采用多向镦粗对7075铝合金试样进行压缩,利用有限元软件对多向镦粗的组织晶粒度预报,探索模拟分析与实验分析相结合的方法,研究7075铝合金多向镦粗过程的组织晶粒变化规律,并对五道次镦粗试样与初始样进行室温拉伸力学性能测试和采用SEM断口形貌观察。模拟结果表明:经过5道次镦粗后试样中心区域的组织晶粒明显细化,晶粒尺寸从初始的40μm减小到17μm;随着道次的增加,组织晶粒细化效果逐渐减弱。对比模拟预报与实验分析结果表明:两者在晶粒细化程度上吻合良好;经过5道次镦粗之后,拉伸断裂强度从初始的547 MPa增加到665 MPa,断面收缩率从初始的7.1%增加到28.4%,断口韧窝深而大,强度塑性明显提高。

关键词(KeyWords)： 组织晶粒度预报;多向镦粗;动态再结晶;7075铝合金

Abstract:

Keywords:

基金项目(Foundation): 教育部科学技术研究重大项目(311025)

作者(Author): 杨栋,陈文琳,王少阳,周瑞,李亨

DOI: 10.13289/j.issn.1009-6264.2014.02.038

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