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Effect of T6I6 treatment on dynamic mechanical behaviour of Al-Si-Mg-Cu cast alloy and impact resistance of its cast motor shell

T6I6 处理对 Al-Si-Mg-Cu 合金及其铸造电机机壳动态力学行为和抗冲击性能的影响

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Abstract

The effect of T6I6 treatment on the dynamic mechanical and microstructure behaviour of Al-Si-Mg-Cu cast alloy was investigated using split Hopkinson pressure bar (SHPB), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). Besides, the impact resistances of T6I6 and T6 motor shells of new energy vehicles made of Al-Si-Mg-Cu cast alloy were compared using a trolley crash test. The results indicated that the main strengthening-phases of the T6 peak-aged and T6I6 peak-aged alloy were GP zone and β″ precipitates. T6I6 treatment can increase the density and size of β″ precipitates in peak-aged alloy and enhance both its tensile strength (σb) and elongation (δ). The dynamic toughness values of T6I6 samples are 50.34 MJ/m3 at 2000 s−1 and 177.34 MJ/m3 at 5000 s−1 which are 20% and 12% higher than those of T6 samples, respectively. Compared with a T6 shell, the overall deformation of T6I6 shell is more uniform during the crash test. At an impact momentum of 3.5×104 kg·m/s, the T6I6 shell breaks down at 0.38 s which is 0.10 s later than the T6 shell.

摘要

采用分离式霍普金森压杆(SHPB)、 透射电镜(TEM)和高分辨透射电镜(HRTEM)研究了T6I6处理对Al-Si-Mg-Cu铸造合金动态力学行为和显微组织的影响. 通过台车碰撞试验, 比较了Al-Si-Mg-Cu铸造的新能源汽车发动机机壳分别经过T6I6和T6处理后的抗冲击性能. 结果表明, T6峰时效合金和T6I6 峰时效合金的强化相主要为GP区和β″相. T6I6 处理能增加合金中β″相的密度和体积, 从而提高合金的抗拉强度(σb)和伸长率(δ). T6I6试样在2000 s−1 和5000 s−1 应变速率下的动态韧性分别为50.34 MJ/m3和177.34 MJ/m3, 比T6试样的分别高20%和12%. 与T6机壳相比, T6I6机壳在碰撞试验中的整体变形更加均匀. 当冲击动量为3.5×104kg·m/s时, T6I6壳体在0.38 s时发生破裂, 比T6壳体晚0.10 s.

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References

  1. LI Hong, LI Xin. The present situation and the development trend of new materials used in automobile lightweight [J]. Applied Mechanics and Materials, 2012, 189: 58–62. DOI: https://doi.org/10.4028/www.scientific.net/amm.189.58.

    Article  Google Scholar 

  2. HE Hong, WU Xiao-dong, SUN Chao-rong, et al. Grain structure and precipitate variations in 7003-T6 aluminum alloys associated with high strain rate deformation [J]. Materials Science and Engineering A, 2019, 745: 429–439. DOI: https://doi.org/10.1016/j.msea.2019.01.003.

    Article  Google Scholar 

  3. BI Jiang, ZHAO Chang-cai, BI Meng-meng, et al. Heat treatment and granule medium internal high-pressure forming of AA6061 tube [J]. Journal of Central South University, 2017, 24(5): 1040–1049. DOI: https://doi.org/10.1007/s11771-017-3507-8.

    Article  Google Scholar 

  4. SAHA S, SH T, RH G. Effect of overageing conditions on microstructure and mechanical properties in Al−Si−Mg alloy [J]. Journal of Material Science & Engineering, 2016, 5(5): 1–4. DOI: https://doi.org/10.4172/2169-0022.1000281.

    Google Scholar 

  5. SAMUEL A M, DOTY H W, VALTIERRA S, et al. Relationship between tensile and impact properties in Al−Si−Cu−Mg cast alloys and their fracture mechanisms [J]. Materials & Design, 2014, 53: 938–946. DOI: https://doi.org/10.1016/j.matdes.2013.07.021.

    Article  Google Scholar 

  6. LIU Chu-sheng, LIANG Qiu-hua, HAN Wei, et al. Heating analysis and temperature control of spiral sand core box for water-cooled housing [J]. International Journal of Metalcasting, 2020, 14(2): 375–383. DOI: https://doi.org/10.1007/s40962-019-00355-8.

    Article  Google Scholar 

  7. JIAO Yi-nan, ZHANG Yi-fan, MA Shi-qing, et al. Effects of microstructural heterogeneity on fatigue properties of cast aluminum alloys [J]. Journal of Central South University, 2020, 27(3): 674–697. DOI: https://doi.org/10.1007/s11771-020-4323-0.

    Article  Google Scholar 

  8. LIU Kun, CHEN X G. Influence of the modification of iron-bearing intermetallic and eutectic Si on the mechanical behavior near the solidus temperature in Al−Si−Cu 319 cast alloy [J]. Physica B: Condensed Matter, 2019, 560: 126–132. DOI: https://doi.org/10.1016/j.physb.2019.02.022.

    Article  Google Scholar 

  9. SAMUEL A M, DOTY H W, VALTIERRA S, et al. Effect of grain refining and Sr-modification interactions on the impact toughness of Al−Si−Mg cast alloys [J]. Materials & Design, 2014, 56: 264–273. DOI: https://doi.org/10.1016/j.matdes.2013.10.029.

    Article  Google Scholar 

  10. XU Cong, WANG Fang, MUDASSAR H, et al. Effect of Sc and Sr on the eutectic Si morphology and tensile properties of Al−Si−Mg alloy [J]. Journal of Materials Engineering and Performance, 2017, 26(4): 1605–1613. DOI: https://doi.org/10.1007/s11665-017-2599-5.

    Article  Google Scholar 

  11. ELAHI M A, SHABESTARI S G. Effect of various melt and heat treatment conditions on impact toughness of A356 aluminum alloy [J]. Transactions of Nonferrous Metals Society of China, 2016, 26(4): 956–965. DOI: https://doi.org/10.1016/S1003-6326(16)64191-2.

    Article  Google Scholar 

  12. IBRAHIM M F, SAMUEL A M, DOTY H W, et al. Effect of aging conditions on precipitation hardening in Al−Si−Mg and Al−Si−Cu−Mg alloys [J]. International Journal of Metalcasting, 2017, 11(2): 274–286. DOI: https://doi.org/10.1007/s40962-016-0057-z.

    Article  Google Scholar 

  13. RAM S C, CHATTOPADHYAY K, CHAKRABARTY I. High temperature tensile properties of centrifugally cast in situ Al−Mg2Si functionally graded composites for automotive cylinder block liners [J]. Journal of Alloys and Compounds, 2017, 724: 84–97. DOI: https://doi.org/10.1016/j.jallcom.2017.06.306.

    Article  Google Scholar 

  14. CHAUDHURY S K, APELIAN D. Effects of Mg and Cu content on quench sensitivity of Al−Si−Mg alloy [J]. International Journal of Metalcasting, 2016, 10(2): 138–146. DOI: https://doi.org/10.1007/s40962-016-0020-z.

    Article  Google Scholar 

  15. CHEN Y, LU B Q, ZHANG H A. Hardening and precipitation of a commercial 6061 Al alloy during natural and artificial ageing [J]. IOP Conference Series: Materials Science and Engineering, 2020, 770(1): 012065. DOI: https://doi.org/10.1088/1757-899x/770/1/012065.

    Article  Google Scholar 

  16. ALEXOPOULOS N D, STYLIANOS A, CAMPBELL J. Dynamic fracture toughness of Al−7Si−Mg (A357) aluminum alloy [J]. Mechanics of Materials, 2013, 58: 55–68. DOI: https://doi.org/10.1016/j.mechmat.2012.11.005.

    Article  Google Scholar 

  17. LI Bo, WANG Xiao-min, CHEN Hui, et al. Influence of heat treatment on the strength and fracture toughness of 7N01 aluminum alloy [J]. Journal of Alloys and Compounds, 2016, 678: 160–166. DOI: https://doi.org/10.1016/j.jallcom.2016.03.228.

    Article  Google Scholar 

  18. LAN Jian, SHEN Xue-jun, LIU Juan, 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. DOI: https://doi.org/10.1016/j.msea.2018.12.051.

    Article  Google Scholar 

  19. XU Xue-hong, DENG Yun-lai, CHI Shui-qing, et al. Effect of interrupted ageing treatment on the mechanical properties and intergranular corrosion behavior of Al−Mg−Si alloys [J]. Journal of Materials Research and Technology, 2020, 9(1): 230–241. DOI: https://doi.org/10.1016/j.jmrt.2019.10.050.

    Article  Google Scholar 

  20. CHEN Song-yi, CHEN Kang-hua, DONG Peng-xuan, et al. Effect of a novel three-step aging on strength, stress corrosion cracking and microstructure of AA7085 [J]. Journal of Central South University, 2016, 23(8): 1858–1862. DOI: https://doi.org/10.1007/s11771-016-3240-8.

    Article  Google Scholar 

  21. LIPA S, KACZMAREK Ł, STEGLIŃSKI M, et al. Effect of core/shell precipitations on fatigue strength of 2024-T6I6 alloy [J]. International Journal of Fatigue, 2019, 127: 165–174. DOI: https://doi.org/10.1016/j.ijfatigue.2019.06.006.

    Article  Google Scholar 

  22. BUHA J, LUMLEY R N, CROSKY A G. Microstructural development and mechanical properties of interrupted aged Al−Mg−Si−Cu alloy [J]. Metallurgical and Materials Transactions A, 2006, 37(10): 3119–3130. DOI: https://doi.org/10.1007/s11661-006-0192-x.

    Article  Google Scholar 

  23. MAO Hong, KONG Yi, CAI Dan, et al. β″ needle-shape precipitate formation in Al−Mg−Si alloy: Phase field simulation and experimental verification [J]. Computational Materials Science, 2020, 184: 109878. DOI: https://doi.org/10.1016/j.commatsci.2020.109878.

    Article  Google Scholar 

  24. KLEIVEN D, AKOLA J. Precipitate formation in aluminium alloys: Multi-scale modelling approach [J]. Acta Materialia, 2020, 195: 123–131. DOI: https://doi.org/10.1016/j.actamat.2020.05.050.

    Article  Google Scholar 

  25. GUO M X, DU J Q, ZHENG C H, et al. Influence of Zn contents on precipitation and corrosion of Al−Mg−Si−Cu−Zn alloys for automotive applications [J]. Journal of Alloys and Compounds, 2019, 778: 256–270. DOI: https://doi.org/10.1016/j.jallcom.2018.11.146.

    Article  Google Scholar 

  26. CAI Cheng, GENG Hui-fang, WANG Shi-fu, et al. Microstructure evolution of AlSi10Mg(Cu) alloy related to isothermal exposure [J]. Materials (Basel, Switzerland), 2018, 11(5): 809. DOI: https://doi.org/10.3390/ma11050809.

    Article  Google Scholar 

  27. ESMAEILI S, LLOYD D J, POOLE W J. A yield strength model for the Al−Mg−Si−Cu alloy AA6111 [J]. Acta Materialia, 2003, 51(8): 2243–2257. DOI: https://doi.org/10.1016/S1359-6454(03)00028-4.

    Article  Google Scholar 

  28. LEE H, SOHN S S, JEON C, et al. Dynamic compressive deformation behavior of SiC-particulate-reinforced A356 Al alloy matrix composites fabricated by liquid pressing process [J]. Materials Science and Engineering A, 2017, 680: 368–377. DOI: https://doi.org/10.1016/j.msea.2016.10.102.

    Article  Google Scholar 

  29. ZAMANI M, SEIFEDDINE S, JARFORS A E W. High temperature tensile deformation behavior and failure mechanisms of an Al−Si−Cu−Mg cast alloy—The microstructural scale effect [J]. Materials & Design, 2015, 86: 361–370. DOI: https://doi.org/10.1016/j.matdes.2015.07.084.

    Article  Google Scholar 

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Authors and Affiliations

  1. Hunan Provincial Key Laboratory of New Energy Storage and Conversion of Advanced Materials, Xiangtan, 411201, China

    Yu-qiang Chen  (陈宇强), Jia-bei Xu  (徐加贝), Wen-hui Liu  (刘文辉), Yu-feng Song  (宋宇峰), Xin-rong Tan  (谭欣荣) & Yang Liu  (刘阳)

  2. Advanced Research Center, Central South University, Changsha, 410083, China

    Su-ping Pan  (潘素平)

  3. Hunan Runtai New Energy Science and Technology Ltd., Xiangxiang, 411400, China

    Ning-bo Li  (李宁波) & Chen-gui Ou  (欧陈贵)

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  1. Yu-qiang Chen  (陈宇强)
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Contributions

The overarching research goals were developed by CHEN Yu-qiang, PAN Su-ping, and LI Ning-bo. OU Chen-gui provided the Al-Si-Mg-Cu cast alloy and its cast motor shell. LIU Wen-hui and SONG Yu-feng completed the SHPB experiment and analyzed the experimental data. TAN Xin-rong and LIU Yang provided the data of crash test, and analyzed the measured data. CHEN Yu-qiang and PAN Su-ping provided microscopic characterization data. The initial draft of the manuscript was written by XU Jia-bei. All authors replied to reviewers’ comments and revised the final version.

Corresponding author

Correspondence to Yu-qiang Chen  (陈宇强).

Ethics declarations

CHEN Yu-qiang, XU Jia-bei, PAN Su-ping, LI Ning-bo, OU Chen-gui, LIU Wen-hui, SONG Yu-feng, TAN Xin-rong and LIU Yang declare that they have no conflict of interest.

Additional information

Foundation item: Projects(52075166, 51875197) supported by the National Natural Science Foundation of China; Projects(2019RS2064, 2019GK5043) supported by the Science and Technology Planning Project of Hunan Province, China

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Chen, Yq., Xu, Jb., Pan, Sp. et al. Effect of T6I6 treatment on dynamic mechanical behaviour of Al-Si-Mg-Cu cast alloy and impact resistance of its cast motor shell. J. Cent. South Univ. 29, 924–936 (2022). https://doi.org/10.1007/s11771-022-4964-2

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