文献类型：期刊文献

中文题名：Zn含量对Al-Zn-Mg-Cu铸轧板组织和裂纹的影响

英文题名：Effects of Zn Content on Microstructure and Cracks During Twin-Roll Casting of Al-Zn-Mg-Cu Cast-Rolled Strips

作者：徐振[1,2];马廷跃[1];刘洋[3];于晓明[4];郭菁[1];李胜利[1];王洪斌[1]

机构：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051;[2]海洋装备用金属材料及其应用国家重点实验室,辽宁鞍山114000;[3]华东理工大学资源与环境工程学院,上海200237;[4]沈阳理工大学材料科学与工程学院,辽宁沈阳110159

年份：2020

卷号：49

期号：12

起止页码：4064

中文期刊名：稀有金属材料与工程

外文期刊名：Rare Metal Materials and Engineering

收录：CSTPCD;;EI(收录号：20210509850510);Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000607448600009)】；北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：National Natural Science Foundation of China (51874172); Natural Science Foundation Project of Liaoning Province (2019-ZD-0025); Youth Foundation of the University of Science and Technology Liaoning (2019QN09)

语种：中文

中文关键词：铝合金;双辊铸轧;Al-Zn-Mg-Cu条带;裂纹;

外文关键词：aluminum alloys;twin-roll casting;Al-Zn-Mg-Cu strips;crack;

摘要：研究了3.5%,5%,6.5%,8%和10%(质量分数)Zn含量铸轧Al-Zn-Mg-Cu合金的宏观裂纹和微观组织。结果表明:Zn含量由10%减少至5%时,铸轧条带的宏观裂纹数量明显降低;但当Zn含量由5%减少至3.5%时,裂纹数量减少十分有限。铸轧条带显微组织从表层到中心呈柱状晶向等轴晶的转变。随着Zn含量的增加,铸轧板中心低熔点共晶相偏聚带变宽,粗大非平衡共晶相数量增多,偏析加重。在高Zn含量(10%)的铸轧条带组织中有明显的孔洞存在。
The microstructure and macroscopic cracks of five twin-roll casted Al-Zn-Mg-Cu alloys strips with various Zn contents(3.5 wt%,5 wt%,6.5 wt%,8 wt%,and 10 wt%)were investigated.The results show that the macroscopic cracks of strips decrease in numbers as the Zn content decreases from 10 wt%to 5 wt%,while this decrease is inhibited as the Zn content continuously d ecreases from 5 wt%to 3.5 wt%.The microstructure shows a transition from columnar crystals to equiaxed crystals along the surface to t he center of the cast strip.The center segregation band of the cast strips becomes wider and the non-equilibrium coarse eutectic phases increase in amount as the Zn content increases in these Al-Zn-Mg-Cu strips.Unsolidified liquid phases and holes appear in the microstructure of strips with 10 wt%Zn.