期刊论文

Dai, X.-Y.(dxy0124@126.com)

中文

中国有色金属学报

1004-0609

2007

17

3

396-401

10.19476/j.ysxb.1004.0609.2007.03.008

湖南省自然科学基金资助项目（06JJ4111）；

本校为第一且通讯机构

通过金相、扫描电镜、透射电镜和X射线衍射仪以及拉伸性能和电导率测试,研究Al-9.0Zn-2.5Mg-1.2Cu-0.12Sc-0.15Zr合金的组织性能.研究结果表明:含0.12%Sc的7 000系铝合金铸态组织为细小的等轴晶;合金经强化固溶和T6处理后,抗拉强度σb达829.4 MPa,伸长率δ为5.7%;合金经一般固溶及RRA处理后,σb为733.4 MPa,δ为5.4%,电导率为37.6%.合金强化机理主要为Al3(Sc,Zr)引起的细晶强化、亚结构强化和沉淀强化.

The microstructure and properties of Al-9.0Zn-2.5Mg-l.2Cu-0.12Sc-0.15Zr alloy under different treatment conditions were investigated by using optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffractometry and measurements of tensile properties and electric conductivity. The results show that the as-cast microstructures of 7000 series alloys with 0.12%Sc are equiaxed. After strengthening solution and T6 treatment, the tensile strength and elongation of studied alloy are 829.4 MPa and 5.7%, respectively. After solution and RRA, the tensi...