| 非等温时效对2A14铝合金晶间腐蚀和力学性能的影响 |
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| 引用本文： | 詹鑫,李慧中,粱霄鹏,李鹏伟,张克龙,车逸轩.非等温时效对2A14铝合金晶间腐蚀和力学性能的影响[J].矿冶工程,2018,38(6):139-142. |
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| 作者姓名： | 詹鑫 李慧中 粱霄鹏 李鹏伟 张克龙 车逸轩 |
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| 作者单位： | 1.中南大学 材料科学与工程学院,湖南 长沙 410083;
2.中南大学 粉末冶金国家重点实验室,湖南 长沙 410083;
3.中南大学 有色金属材料科学与工程教育部重点实验室,湖南 长沙 410083 |
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| 基金项目： | 国家自然科学基金(51301209) |
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| 摘 要： | 通过拉伸测试、晶间腐蚀实验、极化曲线分析,以及光学显微镜、透射电镜分析等手段,研究了非等温时效工艺对2A14铝合金力学性能、抗晶间腐蚀性能和显微组织的影响。结果表明：相比于T6峰时效,合金经非等温时效处理后,晶内尺寸细小、分布弥散的亚稳θ'相数量增多,合金的硬度和强度提高; 沿晶界处析出的θ'(θ)相尺寸增大,不连续程度增加,使得合金的抗晶间腐蚀性能得到提升。
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| 关 键 词： | 铝合金 非等温时效 显微组织 力学性能 晶间腐蚀 晶界析出相 |
| 收稿时间： | 2018-06-21 |
Effect of Non-Isothermal Aging on Intergranular Corrosion and Mechanical Properties of 2A14 Aluminum Alloy |
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| ZHAN Xin,LI Hui-zhong,LIANG Xiao-peng,LI Peng-wei,ZHANG Ke-long,CHE Yi-xuan.Effect of Non-Isothermal Aging on Intergranular Corrosion and Mechanical Properties of 2A14 Aluminum Alloy[J].Mining and Metallurgical Engineering,2018,38(6):139-142. |
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| Authors: | ZHAN Xin LI Hui-zhong LIANG Xiao-peng LI Peng-wei ZHANG Ke-long CHE Yi-xuan |
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| Affiliation: | 1.School of Materials Science and Engineering, Central South University, Changsha 410083, Hunan, China;
2.State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, Hunan, China;
3.Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha 410083, Hunan, China |
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| Abstract: | Effect of non-isothermal aging on the mechanical properties, intergranular corrosion and microstructure of 2A14 aluminum alloy were investigated using tensile test, intergranular corrosion test, polarization curve analysis, optical microscope and transmission electron microscopy. The results showed that compared to a T6 aged one, alloy after non-isothermal aging had fine crystalline size, increased dispersive metastable θ' phase and improved alloy hardness and strength. The resistance to intergranular corrosion was enhanced due to increased size of θ' phase precipitated along grain boundaries and thus a higher level of discreteness. |
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| Keywords: | aluminum alloy non-isothermal aging microstructure mechanical properties intergranular corrosion grain boundary precipitates |
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