陈颖欣,石常亮,胡权,蔡知之

• 1:广东省工业分析检测中心
• 2:广东凤铝铝业有限公司

摘要(Abstract)：

通过硬度测试、拉伸测试和透射电镜分析等研究了不同预变形与预时效工艺对Al-Cu铝合金断续时效T9I6态的微观组织与力学性能的影响。结果表明:当预变形从10%提高到30%时,可以显著提高T9I6态2519A铝合金的硬度和强度;而当预变形增加到40%时,合金的强度提升不明显。延长预时效时间,不能促进合金力学性能的提高。合金的最佳预变形量在20%～30%之间,预时效时间在2 h以内,此时合金的抗拉强度为530 MPa、屈服强度为495 MPa、伸长率为12.5%。适当提高预变形量可以有效地改善θ′析出相的尺寸和分布,并提高加工硬化效果,提高合金的强度。延长预时效时间,消耗了合金中的过饱和溶质原子,影响了低温时效中析出相的析出,对合金的力学性能不利。

关键词(KeyWords)： T9I6断续时效;预变形;预时效;力学性能;显微组织

Abstract:

Keywords:

基金项目(Foundation): 广东省自然科学基金(2018A030310417);; 广东省科学院科技项目(2019GDASYL-030209);; 广州市对外科技合作计划项目(No.201907010004)

作者(Author): 陈颖欣,石常亮,胡权,蔡知之

DOI: 10.13289/j.issn.1009-6264.2020-0171

参考文献(References)：

• [1] Lumley R N,Polmear I J,Morton A J.Heat treatment of age-hardenable aluminum alloys:US7037391B2[P].2006.
• [2] Lumley R N,Polmear I J,Morton A J.Heat treatment of age-hardenable aluminum alloys:US7025839B2[P].2006.
• [3] Lumley R N,Polmear I J,Morton A J.Interrupted aging and secondary precipitation in aluminium alloys[J].Materials Science and Technology,2003,19(11):1483-1490.
• [4] Lumley R N,Polmear I J,Morton A J.Temper developments using secondary aging[J].Materials Forum,2004,28:85-95.
• [5] Lumley R N,Polmear I J,Morton A J.Development of mechanical properties during secondary aging in aluminium alloys[J].Materials Science and Technology,2005,21(9):1025-1032.
• [6] Buha J,Lumley R N,Crosky A G.Precipitation and solute distribution in an interrupted-aged Al-Mg-Si-Cu alloy[J].Philosophical Magazine,2008,88(3):373-390.
• [7] Buha J,Lumley R N,Crosky A G.Secondary ageing in an aluminium alloy 7050[J].Materials Science and Engineering A,2008,492(1):1-10.
• [8] Buha J,Lumley R N,Crosky A G,et al.Secondary precipitation in an Al-Mg-Si-Cu alloy[J].Acta Materialia,2007,55:3015-3024.
• [9] Marceau R K W,Sha G,Lumley R N,et al.Evolution of solute clustering in Al-Cu-Mg alloys during secondary ageing[J].Acta Materialia,2009,58(5):1795-1805.
• [10] 顾刚,叶凌英,张新明,等.断续时效对 2519A 铝合金组织和力学性能的影响[J].中国有色金属学报,2013,23(8):2098-2103.GU Gang,YE Ling-ying,ZHANG Xin-min,et al.Effects of interrupted ageing on microstructure and mechanical properties of 2519A aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2013,23(8):2098-2103.
• [11] 贵星卉,叶凌英,孙大翔,等.断续时效对2519A铝合金抗应力腐蚀性能的影响[J].中国有色金属学报,2014,24(12):2995-3001.GUI Xing-hui,YE Ling-ying,SUN Da-xiang,et al.Effect of interrupted aging on stress corrosion resistance of 2519A aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2014,24(12):2995-3001.
• [12] 董宇,叶凌英,孙大翔,等.预变形量对2519A-T9I6铝合金力学性能和组织的影响[J].中国有色金属学报,2017,27(12):2434-2442.DONG Yu,YE Ling-ying,SUN Da-xiang,et al.Effects of pre-deformation on microstructure and mechanical properties of 2519A-T9I6 aluminum alloy[J].The Chinese Journal of Nonferrous Metals,2017,27(12):2434-2442.
• [13] 董宇,叶凌英,孙大翔,等.预时效对T9I6工艺的2519A 铝合金力学性能和组织演变的影响[J].中南大学学报(自然科学版),2018,49(6):1340-1348.DONG Yu,YE Ling-ying,SUN Da-xiang,et al.Effects of pre-ageing on microstructure and mechanical properties of T9I6 heat-treated 2519A aluminum alloy[J].Journal of Central South University (Science and Technology),2018,49(6):1340-1348.
• [14] 王习锋,陈康华,陈送义,等.T9I6断续时效对2219铝合金组织和力学性能的影响[J].材料热处理学报,2019,40(2):55-61.WANG Xi-feng,CHEN Kang-hua,CHEN Song-yi,et al.Effect of T9I6 interrupted aging on microstructure and mechanical properties of 2219 aluminum alloy[J].Transactions of Materials and Heat Treatment,2019,40(2):55-61.
• [15] 周蓉蓉,贺爱国,方华婵,等.预变形量对2219铝合金的力学性能及显微组织影响[J].材料热处理学报,2016,37(4):45-49.ZHOU Rong-rong,HE Ai-guo,FANG Hua-chan,et al.Effects of pre-deformation on microstructure and mechanical properties of 2219 aluminum alloy[J].Transactions of Materials and Heat Treatment,2016,37(4):45-49.
• [16] 李春明,林资源,张承基,等.均匀化处理对Al-Cu-Mg合金组织和性能的影响[J].材料热处理学报,2020,41(4):62-67.LI Chun-ming,LIN Zi-yuan,ZHANG Cheng-ji,et al.Effect of homogenization treatment on microstructure and properties of Al-Cu-Mg alloy[J].Transactions of Materials and Heat Treatment,2020,41(4):62-67.
• [17] Wu Y P,Ye L Y,Jia Y Z,et al.Precipitation kinetics of 2519A aluminum alloy based on aging curves and DSC analysis[J].Transactions of Nonferrous Metals Society of China,2014,24(10):3076-3083.
• [18] Murayama M,Horita Z,Hono K.Microstructure of two-phase Al-1.7at% Cu alloy deformed by equal-channel angular pressing[J].Acta Materialia,2001,49:21-29.

文章评论(Comment)：