摘要
借助OM,TEM观察,拉伸和杯突试验研究w(Zr)≤0.29%对T4P态Al-0.36Mg-1.23Si合金板材显微组织、成形性和烤漆硬化性的影响.结果表明,当w(Zr)≤0.15%时,Zr以40~50 nm的(AlSi)3(Zr_(x)Ti_(1-x))弥散相粒子存在于铝基体中,粒子数量随Zr含量增加而增多,Zr质量分数超过0.22%,板材中出现3~23μm的(AlSi)3(Zr_(x)Ti_(1-x))初生相.添加0.15%Zr使板材的再结晶晶粒从无Zr板材的55μm细化至20μm,Zr含量继续增加,晶粒无明显变化.Zr含量增加,T4P态板材的强度略有增大,延伸率先保持不变后逐渐减小,n_(10-20),r_(10)和I_(E)值基本不变.含Zr合金板材经模拟烤漆后的屈服强度增量均超过86 MPa,但Zr含量增加对合金板材的烤漆硬化性无明显影响.
The effect of Zr content(≤0.29%)on the microstructure,formability and baking hardenability of Al-0.36Mg-1.23Si aluminum alloy sheet after T4P tempering was investigated through the optical microscope(OM)and transmission electron microscope(TEM),tensile and cupping tests.The results show that when the mass fraction of Zr was less than 0.15%,the element in the alloy mainly existed in the form of 40~50 nm(AlSi)3(Zr_(x)Ti_(1-x))dispersoid second-phase particles,and the amount of the particles increased with the Zr addition.The 3~23μm(AlSi)3(Zr_(x)Ti_(1-x))primary particles were observed when the Zr content was over 0.22%.The recrystallization grains were refined from 55μm to 20μm with the Zr fraction increasing from 0%to 0.15%,and there was no significant change of the grain size after a further increase of Zr.With the Zr increase,the strength of the alloy increased,the elongation firstly remained unchanged and then decreased,and the n_(10~20),r_(10)and I_(E)values remained unchanged.The increments of yield strength after the Zr addition were in excess of 86 MPa after the simulated paint baking treatment and the increase of Zr content had no significant effects on their baking hardenability.
作者
田妮
李燕杰
王文泽
冯震
TIAN Ni;LI Yan-jie;WANG Wen-ze;FENG Zhen(School of Materials Science&Engineering,Northeastern University,Shenyang 110819,China;Key Laboratory for Anisotropy and Texture of Materials,Ministry of Education,Northeastern University,Shenyang 110819,China;Research Center for Metallic Wires,Northeastern University,Shenyang 110819,China)
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2023年第1期40-48,共9页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51871043)
中央高校基本科研业务费专项资金资助项目(N180212010)
辽宁省自然科学基金资助项目(2019-MS-113).
