中南大学学报（自然科学版）2018，Vol.49Issue(6)：1349-1356,8.DOI:10.11817/j.issn.1672-7207.2018.06.007
拉应力对6N01铝合金蠕变时效组织与性能的影响
Effect of tensile stress on microstructures and properties of creep aged 6N01 aluminum alloy
摘要
Abstract
The changing regularity of microstructures and properties of 6N01 aluminum alloys after the uniaxial tensile-creep test were studied. After creep aging under different tensile stresses, the microstructures of samples were analyzed by optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM), while the mechanical properties were tested by Vickers hardness and tensile tests. The results show that the sample with 60 MPa loading creep stress has the highest tensile strength (341.6 MPa) after creep aging at 180 ℃ for 6 h, if the loading creep stress of CA treatment is below 60 MPa, the tensile strength would decreases slightly compared with that of 60 MPa loading creep stress. However, when the creep stress exceeds 60 MPa, tensile strength decreases sharply. This is because a greater creep stress would make precipitates coarsen in the aluminum matrix. What's more, stress-orienting effect of precipitation may appear, which makes anisotropic performance worse, and therefore, the mechanical properties of the material become worse.关键词
6N01铝合金/蠕变时效/析出相/位向效应Key words
6N01 aluminum alloy/creep aging/precipitates/precipitation orientation effect分类
矿业与冶金引用本文复制引用
邓运来,单彪,张劲,王宇,张书..拉应力对6N01铝合金蠕变时效组织与性能的影响[J].中南大学学报（自然科学版）,2018,49(6):1349-1356,8.基金项目
国家重点基础研究发展规划(973计划)项目(2012CB619500) （973计划）
国家重点研发计划项目(2016YFB0300901) （2016YFB0300901）
国家自然科学基金资助项目(51375503) （51375503）
广西重大专项计划项目(14122001-5)(Project(2012CB619500) supported by the National Basic Research Program(973 Program) of China （14122001-5）
Project(2016YFB0300901) supported by the Major State Research Program of China （2016YFB0300901）
Project(51375503) supported by the National Natural Science Foundation of China （51375503）
Project(1412001-5) supported by the Major Science and Technology Project of the Guangxi Zhuang Autonomous Region) （1412001-5）
