Anisotropy Behaviors and Microstructure Evolution of 2195 Al-Li Alloy during Ultra-cryogenic Deformation

doi:10.3901/JME.2025.14.073

Abstract

Abstract: The anisotropic behavior of Al-Li alloy significantly influences its formability. The anisotropic mechanical behavior and microstructure evolution of 2195 Al-Li alloy at room temperature (RT) and -196 ℃ ultra-cryogenic temperature (CT) were studied. The tensile properties, strain hardening exponent n value, and anisotropy index r-value of 2195 Al-Li alloy along different directions were obtained by using the technology of CT tensile combined with digital image correlation (DIC), through the uniaxial tensile test at RT and CT. The grain deformation and the texture evolution with tensile deformation were analyzed, through ultra-cryogenic in-situ tensile scanning electron microscope observation. The results show that the n value of 2195 Al-Li alloy increases, the r-value increases, and the Δr value decreases at -196 ℃. When deformed at CT, more grains participate in deformation in different directions of Al-Li alloy, and the deformation uniformity is improved. Ultra-cryogenic temperature can accelerate the texture evolution process of Copper {112} <111>→S {123} <634>→Brass {011} <211>, thereby reducing the Copper texture components and increasing the r-value. In addition, the CT deformation will reduce the volume fraction of the β fiber texture, thereby weakening the influence of texture on in-plane anisotropy and decreasing the Δr value. The results show that the deformation uniformity of Al-Li alloy can be improved at CT, and reveals the micro-mechanism of the anisotropy reduction in the aluminum alloy under CT, laying a theoretical foundation for the application of aluminum alloy CT forming technology.

Key words: 2195 Al-Li alloy, cryogenic deformation, anisotropy, texture, grain deformation

CLC Number:

TG156

YAO Mengjia, WANG Ruiqian, LIU Wei. Anisotropy Behaviors and Microstructure Evolution of 2195 Al-Li Alloy during Ultra-cryogenic Deformation[J]. Journal of Mechanical Engineering, 2025, 61(14): 73-80.

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References

[1] EL-ATY A A，XU Yong，ZHANG Shihong，et al. Experimental investigation of tensile properties and anisotropy of 1420，8090 and 2060 Al-Li alloys sheet undergoing different strain rates and fibre orientation:A comparative study[J]. Procedia Engineering，2017，207:13-18.
[2] BETSOFEN S Y，ANTIPOV V V，KNYAZEV M I. Al-Cu-Li and Al-Mg-Li alloys:Phase composition，texture，and anisotropy of mechanical properties[J]. Russian Metallurgy，2016，2016(4):326-341.
[3] 毕思源，张新瑞，雷正龙，等. 光束摆动方式对2195铝锂合金T型接头双侧激光焊接裂纹的影响[J]. 机械工程学报，2023，59(22):245-253. BI Siyuan，ZHANG Xinrui，LEI Zhenglong，et al. Influence of beam swing mode on cracks of double-sided laser welding of 2195 aluminum-lithium alloy T-joint[J]. Journal of Mechanical Engineering，2023，59(22):245-253.
[4] 褚强，杨夏炜，李文亚，等. 铝锂合金无针搅拌摩擦点焊接头组织演变与强化机制研究[J]. 机械工程学报，2024，60(2):150-158. CHU Qiang，YANG Xiawei，LI Wenya，et al. Microstructure evolution and strengthening mechanism of the probeless friction stir spot welding of a Al-Li alloy[J]. Journal of Mechanical Engineering，2024，60(2):150-158.
[5] DAI Xiang，SHI Lei，TIAN Chunyan，et al. Effect of ultrasonic vibration on microstructures and mechanical properties of friction stir welded 2195 Al-Li alloy[J]. Transactions of Nonferrous Metals Society of China，2024，34(1):80-93.
[6] PRASAD N E，GOKHALE A A，RAO P R. Mechanical behaviour of aluminium-lithium alloys[J]. Sadhana，2003，28(1):209-246.
[7] GIUMMARRA C，THOMAS B G，RIOJA R J. New aluminum lithium alloys for aerospace applications[C]//In Proceedings of the Light Metals Technology Conference，September 24-26，2007，Saint-Sauveur，QC，Canada. LMT，2007:1-6.
[8] LAVERNIA E J，SRIVATSAN T S，MOHAMED F A. Strength，deformation，fracture behaviour and ductility of aluminium-lithium alloys[J]. Journal of Materials Science，1990，25(2):1137-1158.
[9] FU Rong，HUANG Yuanchun，LIU Yu，et al. Influence of homogenization treatment on microstructure and recrystallization behavior of 2195 Al-Li alloy[J]. Transactions of Nonferrous Metals Society of China，2023，33(8):2255-2271.
[10] CHENG Wangjun，LIU Wei，FAN Xiaobo，et al. Cooperative enhancements in ductility and strain hardening of a solution-treated Al-Cu-Mn alloy at cryogenic temperatures[J]. Materials Science and Engineering:A，2020，790:139707.
[11] FENG Bin，GU Bin，LI Shuhui. Cryogenic deformation behavior and failure mechanism of AA7075 alloy sheets tempered at different conditions[J]. Materials Science and Engineering:A，2022，848:143396.
[12] WANG Cheng，ZHANG Jin，ZHU Chunnan，et al. Multi slip activation enabled excellent low-temperature strength-ductility synergy in Al-Cu-Li alloy[J]. Vacuum，2022，204:111328.
[13] YUAN Shijian，CHENG Wangjun，LIU Wei，et al. A novel deep drawing process for aluminum alloy sheets at cryogenic temperatures[J]. Journal of Materials Processing Technology，2020，284:116743.
[14] WANG Xugang，FAN Xiaobo，CHEN Xianshuo，et al. Forming limit of 6061 aluminum alloy tube at cryogenic temperatures[J]. Journal of Materials Processing Technology，2022，306:117649.
[15] DONG Fei，YI Youping，HUANG Shiquan，et al. Cryogenic formability and deformation behavior of 2060 Al-Li alloys with water-quenched and T4 aged temper[J]. Materials Science and Engineering:A，2021，823:141722.
[16] MIRAGLIA M，DAWSON P，LEFFERS T. On the influence of mechanical environment on the emergence of brass textures in FCC metals[J]. Acta Materialia，2007，55(3):799-812.
[17] CHOI S H，CHOI J K，KIM H W，et al. Effect of reduction ratio on annealing texture and r-value directionality for a cold-rolled Al-5% Mg alloy[J]. Materials Science and Engineering:A，2009，519:77-87.
[18] HU Huie，WANG Xinyun. Effect of heat treatment on the in-plane anisotropy of as-rolled 7050 aluminum alloy[J]. Metals，2016，6(4):79.
[19] LI Mengjia，SHI Yunjia，PAN Qinglin，et al. Low anisotropy of fatigue crack growth in Al-5.8Mg-0.25Sc[J]. International Journal of Fatigue，2019，125:170-178.
[20] KIM J G，GUPTA A，KIM M S，et al. Effect of intermediate annealing and reduction ratio on the texture evolution and formability in AA5083[J]. Materials Science and Engineering:A，2022，858:144162.
[21] AN Y G，VEGTER H，MELZER S，et al. Evolution of the plastic anisotropy with straining and its implication on formability for sheet metals[J]. Journal of Materials Processing Technology，2013，213:1419-1425.
[22] ENGLER O，AEGERTER J. Texture and anisotropy in the Al-Mg alloy AA 5005-Part II:Correlation of texture and anisotropic properties[J]. Materials Science and Engineering:A，2014，618:663-671.
[23] AHMADIKIA B，PARASKEVAS O，VAN HYNING W，et al. Data-driven texture design for reducing elastic and plastic anisotropy in titanium alloys[J]. Acta Materialia，2024，265:119585.
[24] RATURI M，BHATTACHARYA A. Microstructure and texture correlation of secondary heating assisted dissimilar friction stir welds of aluminum alloys[J]. Materials Science and Engineering:A，2021，825:141891.
[25] NIU Pengliang，LI Wenya，CHEN Yuhua. Base material location dependence of corrosion response in friction-stir-welded dissimilar 2024-to-5083 aluminum alloy joints[J]. Transactions of Nonferrous Metals Society of China，2022，32(7):2164-2176.