| 时效工艺对2519A铝合金力学性能及抗应力腐蚀开裂性能的影响 |
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| 引用本文： | 贵星卉,孙大翔,叶凌英,赵丕植.时效工艺对2519A铝合金力学性能及抗应力腐蚀开裂性能的影响[J].材料热处理学报,2021,42(3):73-79. |
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| 作者姓名： | 贵星卉 孙大翔 叶凌英 赵丕植 |
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| 作者单位： | 中铝材料应用研究院有限公司苏州分公司,江苏苏州 215026;广东省工业分析检测中心,广东广州 510650;中南大学材料科学与工程学院,湖南长沙 410083;中铝材料应用研究院有限公司,北京 102209 |
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| 摘 要： | 通过常温拉伸实验、慢应变拉伸应力腐蚀实验、极化曲线测试及透射电镜等研究了不同时效工艺对2519A合金的力学性能和抗应力腐蚀开裂性能的影响。结果表明:与传统的2519A-T87合金相比,再时效时间为19 h的2519A-T9I7合金同时具有优异的力学性能和良好的抗应力腐蚀开裂性能。这是由于2519A-T9I7合金在T9I6态的基础上延长了再时效时间,使晶界析出相聚集球化,相间距增加,破坏了腐蚀通路,提高了抗应力腐蚀开裂性能。
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| 关 键 词： | 2519A铝合金 力学性能 抗应力腐蚀开裂 晶界析出相 |
Effect of aging process on mechanical properties and resistance to stress corrosion cracking of 2519A aluminum alloy |
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| GUI Xing-hui,SUN Da-xiang,YE Ling-ying,ZHAO Pi-zhi.Effect of aging process on mechanical properties and resistance to stress corrosion cracking of 2519A aluminum alloy[J].Transactions of Materials and Heat Treatment,2021,42(3):73-79. |
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| Authors: | GUI Xing-hui SUN Da-xiang YE Ling-ying ZHAO Pi-zhi |
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| Affiliation: | (Chinalco Materials Application Research Institute Co Ltd,Suzhou Branch,Suzhou 215026,China;Guangdong Industrial Analysis and Testing Center,Guangzhou 510650,China;School of Material Sience and Engineering,Central South University,Changsha 410083,China;Chinalco Materials Application Research Institute Co Ltd,Beijing 102209,China) |
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| Abstract: | Effect of different aging processes on mechanical properties and resistance to stress corrosion cracking(SCC)of 2519 A aluminum alloy was studied by means of room temperature tensile test,slow strain tensile stress corrosion test,polarization curve test and transmission electron microscopy(TEM).The results show that compared with the traditional 2519 A-T87 alloy,2519 A-T9 I7 alloy with re-aging time of 19 h has excellent mechanical properties and good resistance to SCC.This is because the re-aging time of the 2519 A-T9 I7 alloy is prolonged on the basis of T9 I6 state,makes the grain boundary precipitation gather spheroidization,increases the distance between phases,destroys the corrosion path,and improves the resistance to stress corrosion cracking. |
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| Keywords: | 2519A aluminum alloy mechanical property stress corrosion cracking grain boundary precipitate |
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