预变形与预时效对断续时效处理Al-Cu合金微观组织与力学性能的影响

陈颖欣, 石常亮, 胡权, 蔡知之

材料热处理学报 ›› 2020, Vol. 41 ›› Issue (11) : 38-45.

PDF(9385 KB)
PDF(9385 KB)
材料热处理学报 ›› 2020, Vol. 41 ›› Issue (11) : 38-45. DOI: 10.13289/j.issn.1009-6264.2020-0171
有色金属合金材料

预变形与预时效对断续时效处理Al-Cu合金微观组织与力学性能的影响

  • 陈颖欣1, 石常亮1, 胡权2, 蔡知之2
作者信息 +

Effects of pre-deformation and pre-aging on microstructure and mechanical properties of interrupted aged Al-Cu alloy

  • CHEN Ying-xin1, SHI Chang-liang1, HU Quan2, CAI Zhi-zhi2
Author information +
文章历史 +

摘要

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。

Abstract

The effects of different pre-deformation and pre-aging processes on microstructure and mechanical properties of interrupted aged Al-Cu aluminum alloy were studied by means of hardness test, tensile test and transmission electron microscopy. The results show that when the pre-deformation increases from 10% to 30%, the hardness and strength of the interrupted aged 2519A aluminum alloy can be significantly improved, and when the pre-deformation is increased to 40%, the strength increment of the alloy is not obvious. The mechanical properties of the alloy are not improved with the increase of pre-aging time. The optimum pre-deformation of the alloy is between 20% and 30%, and the pre-aging time is within 2 h, and at this time, the tensile strength of the alloy is 530 MPa, the yield strength is 495 MPa, and the elongation is 12.5%. Appropriately increasing the amount of pre-deformation can effectively improve the size and distribution of the θ' precipitates, and improve the work hardening effect and the strength of the alloy. Prolonging the pre-aging time will make the supersaturated solute atoms in the alloy decrease and disappear, which will affect the precipitation of the precipitated phase in the low temperature aging and be unfavorable to the mechanical properties of the alloy.

关键词

T9I6断续时效 / 预变形 / 预时效 / 力学性能 / 显微组织

Key words

T9I6 interrupted aging / pre-deformation / pre-aging / mechanical property / microstructure

引用本文

导出引用
陈颖欣, 石常亮, 胡权, 蔡知之. 预变形与预时效对断续时效处理Al-Cu合金微观组织与力学性能的影响[J]. 材料热处理学报, 2020, 41(11): 38-45 https://doi.org/10.13289/j.issn.1009-6264.2020-0171
CHEN Ying-xin, SHI Chang-liang, HU Quan, CAI Zhi-zhi. Effects of pre-deformation and pre-aging on microstructure and mechanical properties of interrupted aged Al-Cu alloy[J]. Transactions of Materials and Heat Treatment, 2020, 41(11): 38-45 https://doi.org/10.13289/j.issn.1009-6264.2020-0171

参考文献

[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.

基金

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)
PDF(9385 KB)

179

Accesses

0

Citation

Detail

段落导航
相关文章

/