Abstract
The effect of temperature in range of 155–175 °C on the creep behavior, microstructural evolution, and precipitation of an Al-Cu-Li alloy was experimentally investigated during creep ageing deformation under 180 MPa for 20 h. Increasing temperature resulted in a noteworthy change in creep ageing behaviour, including a variation in creep curves, an improvement in creep rate during early creep ageing, and an increased creep strain. Tensile tests indicate that the specimen aged at higher temperature reached peak strength within a shorter time. Transmission electron microscopy (TEM) was employed to explore the effect of temperature on the microstructural evolution of the AA2198 during creep ageing deformation. Many larger dislocations and even tangled dislocation structures were observed in the sample aged at higher temperature. The number of T1 precipitates increased at higher ageing temperature at the same ageing time. Based on the analysed results, a new mechanism, considering the combined effects of the formation of larger dislocation structures induced by higher temperature and diffusion of solute atoms towards these larger or tangled dislocations, was proposed to explain the effect of temperature on microstructural evolution and creep behaviour.
摘要
在180 MPa,20 h 的蠕变时效条件下,研究了Al-Cu-Li 合金在155∼175 °C 的蠕变行为、微观 组织和析出行为。温度的升高导致蠕变时效行为发生显著的变化,包括蠕变曲线的变化、蠕变时效早 期蠕变速率的提高和蠕变量的增加。拉伸测试结果表明,在更高的温度下,试样提前达到峰值。利用 透射电镜(TEM)观察温度对AA2198 合金在蠕变时效成形中微观组织演化的影响。在更高温度时效的 样品中观察到了更多较大的位错,甚至有缠结的位错结构。在相同的时间内,温度越高,T1 相析出的 越多。根据分析结果建立了一种新的机制,解释了温度对微观结构演化和蠕变行为的影响。该机制考 虑了由更高温度引起的更大的位错结构的形成和溶质原子向这些更大的或缠结的位错扩散的综合 效应。
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JESHVAGHANI R A, EMAMI M, SHAHVERDI H R, HADAVI S M M. Effects of time and temperature on the creep forming of 7075 aluminum alloy: Springback and mechanical properties [J]. Materials Science and Engineering A, 2011, 528: 8795–8799. DOI: https://doi.org/10.1016/j.msea.2011.08.025.
ZHAN Li-hua, LIN Jian-guo, DEAN T A. A review of the development of creep age forming: Experimentation, modelling and applications [J]. International Journal of Machine Tools and Manufacture, 2011, 51: 1–17. DOI: https://doi.org/10.1016/j.ijmachtools.2010.08.007.
ZHAN Li-hua, LIN Jian-guo, DEAN T A, HUANG Ming-hui. Experimental studies and constitutive modelling of the hardening of aluminium alloy 7055 under creep age forming conditions [J]. International Journal of Mechanical Sciences, 2011, 53: 595–605. DOI: https://doi.org/10.1016/j.ijmecsci.2011.05.006.
RIOJA R J, LIU J. The evolution of Al-Li base products for aerospace and space applications [J]. Metallurgical and Materials Transactions A, 2012, 43: 3325–3337. DOI: https://doi.org/10.1007/s11661-012-1155-z.
WARNER T. Recently-developed aluminium solutions for aerospace applications [J]. Materials Science Forum, 2006, 519–521: 1271–1278. DOI: https://doi.org/10.4028/www.scientific.net/MSF.519-521.1271.
KUMAR K S, BROWN S A, PICKENS J R. Microstructural evolution during aging of an Al-Cu-Li-Ag-Mg-Zr alloy [J]. Acta Materialia, 1996, 44: 1899–1915. DOI: https://doi.org/10.1016/1359-6454(95)00319-3.
GAYLE F W, HEUBAUM F H, PICHENS J R. Structure and properties during aging of an ultra-high strength Al-Cu-Li-Ag-Mg alloy [J]. Scripta Metallurgica et Materialia, 1990, 24: 79–84. DOI: https://doi.org/10.1016/0956-716X(90)90570-7.
NOBLE B, THOMPSON G E. T1 (Al2CuLi) precipitation in aluminium-copper-lithium alloys [J]. Metal Science Journal, 2013, 6: 167–174. DOI: https://doi.org/10.1179/030634572790445975.
GANLE B M, ZHU A W, CSONTOS A A, STARKE E A Jr. The role of plastic deformation on the competitive microstructural evolution and mechanical properties of a novel Al-Li-Cu-X alloy [J]. Journal of Light Metals, 2001, 1: 1–14. DOI: https://doi.org/10.1016/S1471-5317(00)00002-X.
DECREUS B, DESCHAMPS A, GEUSER F D, DONNADIEU P, SIGLI C, WEYLAND M. The influence of Cu/Li ratio on precipitation in Al-Cu-Li-X alloys [J]. Acta Materialia, 2013, 61: 2207–2218. DOI: https://doi.org/10.1016/j.actamat.2012.12.041.
DONNADIEU P, SHAO Y, GEUSER F D, BOTTON G A, LAZAR S, CHEYNET M, BOISSIEU M D, DESCHAMPS A. Atomic structure of T1 precipitates in Al-Li-Cu alloys revisited with HAADF-STEM imaging and small-angle X-ray scattering [J]. Acta Materialia, 2011, 59(2): 462–472. DOI: https://doi.org/10.1016/j.actamat.2010.09.044.
NIE J F, MUDDLE B C. On the form of the age-hardening response in high strength aluminium alloys [J]. Materials Science and Engineering A, 2001, 319–321: 448–451. DOI: https://doi.org/10.1016/S0921-5093(01)01054-1.
DESCHAMPS A, DECREUS B, GEUSER F D, DORIN T, WEYLANG M. The influence of precipitation on plastic deformation of Al-Cu-Li alloys [J]. Acta Materialia, 2013, 61: 4010–4021. DOI: https://doi.org/10.1016/j.actamat.2013.03.015.
CSONTOS A A, STARKE E A. The effect of inhomogeneous plastic deformation on the ductility and fracture behavior of age hardenable aluminum alloys [J]. International Journal of Plasticity, 2005, 21(6): 1097–1118. DOI: https://doi.org/10.1016/j.ijplas.2004.03.003.
RINGER S P, MUDDLE B C, POLMEAR I J. Effects of cold work on precipitation in Al-Cu-Mg-(Ag) and Al-Cu-Li-(Mg-Ag) alloys [J]. Metallurgical and Materials Transactions A, 1995, 26: 1659–1671. DOI: https://doi.org/10.1007/bf02670753.
ARAULLO-PETERS V, GAULT B, GEUSER F D, DESCHAMPS A, CAIRNEY J M. Microstructural evolution during ageing of Al-Cu-Li-X alloys [J]. Acta Materialia, 2014, 66: 199–208. DOI: https://doi.org/10.1016/j.actamat.2013.12.001.
DORIN T, GEUSER F D, LEFEBVRE W, SIGLI C, DESCHAMPS A. Strengthening mechanisms of T1 precipitates and their influence on the plasticity of an Al-Cu-Li alloy [J]. Materials Science and Engineering A, 2014, 605: 119–126. DOI: https://doi.org/10.1016/j.msea.2014.03.024.
LYU F, LI Yong, SHI Zhu-sheng, HUANG Xia, ZENG Yuansong, LIN Jian-guo. Stress and temperature dependence of stress relaxation ageing behaviour of an Al-Zn-Mg alloy [J]. Materials Science and Engineering A, 2020, 773: 138859. DOI: https://doi.org/10.1016/j.msea.2019.138859.
ZHANG Sai-fei, ZENG Wei-dong, YANG Wen-hua, SHI Chun-ling, WANG Hao-jun. Ageing response of a Al-Cu-Li 2198 alloy [J]. Materials and Design, 2014, 63: 368–374. DOI: https://doi.org/10.1016/j.matdes.2014.04.063.
ZHU Xu-hao, LIN Y C, WU Qiang, JIANG Yu-qiang. Effects of aging on precipitation behavior and mechanical properties of a tensile deformed Al-Cu alloy [J]. Journal of Alloys and Compounds, 2020, 843: 155975. DOI: https://doi.org/10.1016/j.jallcom.2020.155975.
ZOU Yan, CAO Ling-fei, WU Xiao-dong, WANG Yi-chang, SUN Xuan, SONG Hui, COUPER M J. Effect of ageing temperature on microstructure, mechanical property and corrosion behavior of aluminum alloy 7085 [J]. Journal of Alloys and Compounds, 2020, 823: 153792. DOI: https://doi.org/10.1016/j.jallcom.2020.153792.
ZHOU Chang, ZHAN Li-hua, SHEN Ru-lin, ZHAO Xing, YU Hai-liang, HUANG Ming-hui, LI He, YANG You-liang, HU Li-bin, LIU De-bo, HU Zheng-gen. Creep behavior and mechanical properties of Al-Li-S4 alloy at different aging temperatures [J]. Journal of Central South University, 2020, 27(4): 1168–1175. DOI: https://doi.org/10.1007/s11771-020-4357-3.
TSIVOULAS D, ROBSON J D. Heterogeneous Zr solute segregation and Al3Zr dispersoid distributions in Al-Cu-Li alloys [J]. Acta Materialia, 2015, 93: 73–86. DOI: https://doi.org/10.1016/j.actamat.2015.03.057.
LIU Chun-hui, MALLADI S K, XU Qiang, CHEN Jiang-hua, TICHELAAR F D, ZHUGE Xiao-dong, ZANDBERGEN H W. In-situ STEM imaging of growth and phase change of individual CuAlX precipitates in Al alloy [J]. Scientific Reports, 2017, 7: 2184. DOI: https://doi.org/10.1038/s41598-017-02081-9.
ZHANG W, SUI M L, ZHOU Y Z, LI D X. Evolution of microstructures in materials induced by electropulsing [J]. Micron, 2003, 34(3–5): 189–198. DOI: https://doi.org/10.1016/S0968-4328(03)00025-8.
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The overarching research goals were developed by ZHAN Li-hua, ZHAO Xing and HUANG Minghui. ZHOU Chang and LI He provided the measured creep tests data, and analyzed the measured data. The initial draft of the manuscript was written by ZHOU Chang. All authors replied to the reviewers comments and revised the final version.
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ZHAN Li-hua, ZHOU Chang, LI He, ZHAO Xing, HUANG Ming-hui declare that they have no conflict of interest.
Foundation item: Project(2017YFB0306300) supported by the National Key R&D Program of China; Projects(51601060, 51675538) supported by the National Natural Science Foundation of China
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Zhou, C., Zhan, Lh., Li, H. et al. Influence of temperature on creep behavior, mechanical properties and microstructural evolution of an Al-Cu-Li alloy during creep age forming. J. Cent. South Univ. 28, 2285–2294 (2021). https://doi.org/10.1007/s11771-021-4769-8
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DOI: https://doi.org/10.1007/s11771-021-4769-8