Effect of tensile/compressive cold deformation on strengthening of2A14 aluminum alloy after aging

doi:10.13251/j.issn.0254-6051.2021.03.022

Abstract

Abstract: Strength of solution treated 2A14 aluminum alloy during aging process under tensile or compressive cold deformation conditions was studied by using X-ray diffractometer and DSC differential scanning calorimetry with the help of precipitation phase strengthening and dislocation strengthening theoretical model of aluminum alloy. The results show that compared with compressive cold deformation, the dislocation density introduced by tensile cold deformation is greater, so the dislocation strengthening effect is stronger; In the under-aging stage (before θ phase precipitates) of tensile cold deformation, the precipitation of the strengthening phase θ′ phase in the alloy is promoted. In the over-aging stage (after θ phase precipitates), the precipitation of the θ phase is suppressed, and the precipitation strengthening effect of tensile cold deformation is better. The strengthening effect of the 2A14 aluminum alloy after tensile cold deformation is more significant.

Key words: tensile/compressive cold deformation, 2A14 aluminum alloy, strengthening, aging

CLC Number:

TG306

Li Yaojun, Han Zhen, Lan Jian. Effect of tensile/compressive cold deformation on strengthening of2A14 aluminum alloy after aging[J]. Heat Treatment of Metals, 2021, 46(3): 109-112.

References

[1] Pantelakis S G,Alexopoulos N D.Assessment of the ability of conventional and advanced wrought aluminum alloys for mechanical performance in light-weight applications[J].Materials and Design,2008,29(1):80-91.
[2] 潘复生,张丁非.铝合金及应用[M].北京:化学工业出版社,2006.
[3] Srivatsan T S,Vasudevan S,Park L,et al.The quasi-static deformation and final fracture behavior of aluminum alloy 2219[J].Materials Science and Engineering A,2008,497(1/2):270-277.
[4] 王芝秀,李海,魏修宇,等.预变形对2E12铝合金拉伸性能和疲劳寿命的影响[J].稀有金属材料与工程,2010,39(z1):138-141.
Wang Zhixiu,Li Hai,Wei Xiuyu,et al.Effect of pre-deformation on the tensile properties and fatigue life of 2E12 aluminum alloy[J].Rare Metal Materials and Engineering,2010,39(z1):138-141.
[5] 许晓静,朱金鑫,郭云飞,等.固溶-冷变形-时效工艺下超高强Al-Zn-Mg-Cu系铝合金的组织及性能[J].稀有金属材料与工程,2017,46(10):2981-2986.
Xu Xiaojing,Zhu Jinxin,Guo Yunfei,et al.Microstructure and properties of ultra-high-strength Al-Zn-Mg-Cu series aluminum alloy under solution-cold deformation-aging process[J].Rare Metal Materials and Engineering,2017,46(10):2981-2986.
[6] 叶茂,孟祥龙,孟富新,等.2A14铝合金的固溶和形变组织[J].金属热处理,2014,39(5):31-35.
Ye Mao,Meng Xianglong,Meng Fuxin,et al.Solid solution and deformation structure of 2A14 aluminum alloy[J].Heat Treatment of Metals,2014,39(5):31-35.
[7] 陈铭森,韩靖,陈霞,等.不同应变量对7A04铝合金包申格效应的影响[J].热加工工艺,2015,44(6):53-55,59.
Chen Mingsen,Han Jing,Chen Xia,et al.The influence of different strain variables on the Bauschinger effect of 7A04 aluminum alloy[J].Hot Working Technology,2015,44(6):53-55,59.
[8] 王峰.铝合金单个晶粒/亚晶粒内塑性变形机制的原位EBSD研究[D].北京:北京工业大学,2012.
[9] Ungár T,Dragomir I,Borbély A.The contrast factors of dislocations in cubic crystals:The dislocation model of strain anisotropy in practice[J].Journal of Applied Crystallography,1999,32(5):992-1002.
[10] Starink M J,Wang P,Sinclair I,et al.Microstructure and strengthening of Al-Li-Cu-Mg alloys and MMCs:II.Modelling of yield strength[J].Acta Materialia,1999,47(14):3855-3868.
[11] Li F,Zhang H,He W,et al.Compression and tensile consecutive deformation behavior of Mn18Cr18N austenite stainless steel[J].Acta Metallurgica Sinica,2016,52:956-964.
[12] Lan J,Shen X,Liu J,et al.Strengthening mechanisms of 2A14 aluminum alloy with cold deformation prior to artificial aging[J].Materials Science and Engineering A,2019,745:517-535.
[13] Lu Y,Wang J,Li X,et al.Effect of pre-deformation on the microstructures and properties of 2219 aluminum alloy during aging treatment[J].Journal of Alloys and Compounds,2017,699:1140-1145.
[14] 杨德庄.金属强化的微观理论[M].哈尔滨:哈尔滨工业大学出版社,2002.
[15] Sin G V,Smirnov N A.Ab initio calculations of elastic constants and thermodynamic properties of bcc,fcc,and hcp Al crystals under pressure[J].Journal of Physics Condensed Matter,2002,14(29):6989.