中南大学学报（自然科学版）2017，Vol.48Issue(6)：1458-1464,7.DOI:10.11817/j.issn.1672-7207.2017.06.007
多级固溶对7A04铝合金的力学性能和剥落腐蚀性能的影响
Effects of multi-stage solid-solution treatment on mechanical properties and exfoliation corrosion behavior of 7A04 aluminum alloy
摘要
Abstract
The effects of multi-stage solid-solution treatment on the mechanical properties,microstructure and exfoliation corrosion behavior of 7A04 aluminum alloy were investigated by optical microscopy(OM),scanning electron microscopy (SEM),tensile test and exfoliation corrosion test.The results show that compared with single-stage and two-stage solid-solution treatment,the second phase particles fraction of the 7A04 aluminum alloy after triple-stage solid-solution (470 ℃/2 h+480 ℃/1 h+490 ℃/0.5 h) has decreased by 36.9％ and 28.2％.And the ultimate tensile strength Rm,yield strength Rp0.2 of the samples by triple-stage solid-solution and peak aging (120 ℃/24 h) are 718.8 MPa,660.3 MPa,respectively,with approximately 10.6％ elongation.When the solid solution stages increase to the triple,the exfoliation susceptibility of the alloy has reduced and the scale of the exfoliation corrosion resistance has improved from EC to EA-.关键词
7A04铝合金/多级固溶/微观组织/力学性能/剥落腐蚀Key words
7A04 Aluminum alloy/multi-stage solid-solution/microstructure/mechanical property/exfoliation corrosion分类
矿业与冶金引用本文复制引用
王超群,赵君文,李虎,戴光泽,韩靖..多级固溶对7A04铝合金的力学性能和剥落腐蚀性能的影响[J].中南大学学报（自然科学版）,2017,48(6):1458-1464,7.基金项目
国家科技支撑计划项目(2015BAG12B01) （2015BAG12B01）
材料成形与模具技术国家重点实验室开放课题基金资助项目(P2015-10)(Project(2015BAG12B01) supported by the National Key Technology R&D Program of China （P2015-10）
Project(P2015-10) supported by the State Key Laboratory of Materials Processing and Die & Mould Technology,Huazhong University of Science and Technology) （P2015-10）
