中南大学学报（自然科学版）2017，Vol.48Issue(10)：2614-2621,8.DOI:10.11817/j.issn.1672-7207.2017.10.008
Zr质量分数对7003铝合金组织与腐蚀性能的影响
Effect of Zr mass fraction on microstructure and corrosion properties of 7003 aluminum alloy
摘要
Abstract
The effects of Zr mass fraction on microstructure and corrosion properties of 7003 aluminum alloy were studied with mechanical tensile testing, slow strain rate tensile testing, electrochemical corrosion, scanning electron microscopy(SEM) and transmission electron microscopy(TEM), respectively. The results show that when the mass fraction of Zr increases from 0 to 0.21%, the average grain size of 7003 aluminum alloy reduces to 2.3μm by 224.0μm; the tensile strength improves from 332.6 MPa to 399.3 MPa and the yield strength increases from 280.4 MPa to 341.0 MPa; theISSRT of the alloy reduces from 0.32 to 0.20 and the electrochemical corrosion resistance is improved too. The reason is that the number of small and diffuse Al3Zr precipitation is increased with the increasing of Zr mass fraction so that they can strongly inhibit the recrystallization. The microstructure of the alloy retained the original fibrous, and the small angle grain boundary can improve the corrosion resistance of the alloy.关键词
7003铝合金/Zr/再结晶/应力腐蚀/电化学腐蚀Key words
7003 aluminum alloy/Zr/recrystallization/stress corrosion/electrochemical corrosion分类
矿业与冶金引用本文复制引用
姜慧丽,陈送义,陈康华,王培吉,胡桂云..Zr质量分数对7003铝合金组织与腐蚀性能的影响[J].中南大学学报（自然科学版）,2017,48(10):2614-2621,8.基金项目
国家重点研发计划项目(2016YFB0300801) （2016YFB0300801）
国家重点基础研究计划(973计划)项目(2012CB619502,2010CB731701) （973计划）
湖南省自然科学基金资助项目(12JJ6040) （12JJ6040）
国家自然科学基金资助项目(51201186) （51201186）
国家重大科研仪器设备研制专项(51327902)(Project (2016YFB0300801) supported by the National Key Research and Development Plan of China （51327902）
Projects (2012CB619502, 2010CB731701) supported by the National Key Basic Research Program (973 Program) of China （2012CB619502, 2010CB731701）
Project (12JJ6040) supported by the Natural Science Foundation of Hunan Province （12JJ6040）
Project (51201186) supported by the National Natural Science Foundation of China （51201186）
Project (51327902) supported by the National Key Scientific Instruments to Develop Dedicated) （51327902）
