Spall behavior of copper under ultra-high strain rate loading

Xi Tao; Fan Wei; Chu Gen-Bai; Shui Min; He Wei-Hua; Zhao Yong-Qiang; Xin Jian-Ting; Gu Yu-Qiu

doi:10.7498/aps.66.040202

Abstract

The spall behavior of copper at ultra-high strain rate is studied by molecular dynamics simulation combined with an experimental analysis of laser ablation of a bulk copper target by femtosecond laser pulses. In the molecular dynamics simulation, two-temperature model is used, shock wave and spallation characteristics of copper shock-loaded by femtosecond laser are analyzed in detail. It is concluded that the evolution of pressure indicates a triangular waveform of the shock wave, and the spall strength of copper is about 19 GPa at strain rates ranging from 109 s-1 to 1010 s-1, while higher pressure would melt the sample and the spall strength decreases to 14.89 GPa. Normally, the spallation is characterized by the sample free-surface undergoing alternately acceleration and deceleration, and the spallation mechanism could be explained by void nucleation, growth, coalescence that leads to the final fracture. An experiment is conducted to achieve high strain rate load on copper. The driving laser has a pulse width of 25 fs and central wavelength of 800 nm, the thickness values of the shocked copper foils are (5025) nm, fabricated by electron beam sputtering deposition onto 180 upm cover slip substrates. The driving laser beam with maximum intensity 5.51013 W/cm2, is focused on the front surface of the copper through the transparent substrate. Movements of the free rear surfaces of the copper foils are detected by chirped pulse spectral interferometry, and the theoretical time resolution is 1.3 ps. As a result, the free surface displacement and velocity evolution profile of the shocked area are obtained in a single measurement, and the results directly show that the maximum free surface velocity is 0.43 km/s and no alternately acceleration and deceleration appears. According to the shock wave relations, the maximum pressure near free-surface is 8.18 GPa. Meanwhile, derived from the velocity evolution profile, the strain rate is 7.3109 s-1. Combining with the above molecular dynamics simulation results, it is concluded that there is no spallation in the copper foil. Furthermore, we recover the sample targets and observe the microstructures by using scanning electron microscope. The copper foils are peeled off, but no spall scab is observed, indicating that the internal stress is between the copper spall strength and the bonding strength of copper foil with the transparent substrate. Ripple structure on copper surface demonstrates the femtosecond pulsed laser has ablated the copper film, and the propagation of the shock in fs regime is sensitive to microscopic defects.

Keywords:

PACS:

Authors and contacts

1.
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China

Corresponding author: Xin Jian-Ting, jane_xjt@126.com;yqgu@caep.ac.cn ; Gu Yu-Qiu, jane_xjt@126.com;yqgu@caep.ac.cn

Funds: Project supported by the Science and Technology on Plasma Physics Laboratory,China (Grant Nos.9140C680306150C68298,9140C680305140C68289).

References

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3.	王云天，曾祥国，陈华燕，杨鑫，王放，祁忠鹏. 延性金属层裂自由面速度曲线特征多尺度模拟研究. 爆炸与冲击. 2021(08): 139-153 . 百度学术
4.	李不同，叶霞，姚红兵，韦朋余，丛嘉伟，朱卫华. 飞秒激光加载下NiTi形状记忆合金热效应体系研究. 稀有金属. 2020(04): 401-409 . 百度学术
5.	陶明，汪军，李占文，洪志先，王一清，赵瑞. 冲击荷载下花岗岩层裂断口细–微观试验研究. 岩石力学与工程学报. 2019(11): 2172-2181 . 百度学术

其他类型引用(8)

[1]	Qian X S 1962 Notes on Physical Mechanics (Beijing:Science Press) p190 (in Chinese)[钱学森 1962 物理力学讲义 (北京:科学出版社) 第190页]
[2]	Deng X L 2006 Ph. D. Dissertation (Sichuan:Sichuan University) (in Chinese)[邓小良 2006 博士学位论文(四川:四川大学)]
[3]	Gray G T, Maudlin P J, Hull L M, Zuo Q K, Chen S R 2005 J. Fail. Anal. Prev. 5 3
[4]	Tan H 2007 Introduction to Experimenal Shock-Wave Phyiscs (Beijing:National Defense Industry Press) p194 (in Chinese)[谭华 2007 实验冲击波物理导引(北京:国防工业出版社) 第194页]
[5]	Gray G T, Bourne N T, Millett J C F, Lopez M F, Vecchio K S 2002 AIP Conf. Proc. 620 479
[6]	Pedrazas N A, Worthington D L, Dalton D A, Sherek P A, Steuck S P, Quevedo H J, Bernstein A C, Taleff E M, Ditmire T 2012 Mater. Sci. Eng. A 536 117
[7]	Cuq-Lelandais J P, Boustie M, Soulard L, Berthe L, Rességuier T D, Combis P, Carion J B, Lescoute E 2010 EPJ Web Conf. 10 00014
[8]	Moshe E, Eliezer S, Dekel E, Ludmirsky A, Henis Z, Werdiger M, Goldberg I B, Eliaz N, Eliezer D 1998 J. Appl. Phys. 83 8
[9]	Dalton D A, Brewer J, Bernstein A C, Grigsby W, Milathianaki D, Jackson E, Adams R, Rambo P, Schwarz J, Edens A, Geissel M, Smith I, Taleff E, Ditmire T 2007 AIP Conf. Proc. 955 501
[10]	Jarmakani H, Maddox B, Wei C T, Kalantar D, Meyers M A 2010 Acta Mater. 58 4604
[11]	Signor L, Rességuier T D, Dragon A, Roy G, Fanget A, Faessel M 2010 Int. J. Impact Eng. 37 887
[12]	Hixson R S, Gray G T, Rigg P A, Addessio L B, Yablinsky C A 2004 AIP Conf. Proc. 706 469
[13]	Thissell W R, Zurek A K, Macdougall D A, Miller D, Everett R, Geltmacher A, Brooks R, Tonks D 2002 AIP Conf. Proc. 620 475
[14]	Tamura H, Kohama T, Kondo K, Yoshida M 2001 J. Appl. Phys. 89 6
[15]	Cuq-Lelandais J P, Boustie M, Berthe L, Rességuier T D, Combis P, Colombier J P, Nivard M, Claverie J 2009 Phys. D:Appl. Phys. 42 065402
[16]	Ashitkov S I, Komarov P S, Ovchinnikov A V, Struleva E V, Agranat M B 2013 Quantum Elect. 43 3
[17]	Belak J 1998 J. Comput.:Aided Mater. 5 193
[18]	Ashkenazy Y, Averback R S 2005 Appl. Phys. Lett. 86 051907
[19]	Dremov V, Petrovtsev A, Sapozhnikov P, Smirnova M 2006 Phys. Rev. B 74 144110
[20]	Luo S N, Germann T C, Tonks D L 2009 J. Appl. Phys. 106 123518
[21]	Durand O, Soulard L 2012 J. Appl. Phys. 111 044901
[22]	Xiang M Z, Hu H B, Chen J, Long Y 2013 Modelling Simul. Mater. Sci. Eng. 21 055005
[23]	Shao J L, Wang P, He A M, Zhang R, Qin C S 2013 J. Appl. Phys. 114 173501
[24]	Corkum P B, Brunel F, Sherman N K, Rao T S 1988 Phys. Rev. Lett. 61 25
[25]	Zhigilei L V, Lin Z B, Ivanov D S 2009 J. Phys. Chem. C 113 11892
[26]	Anisimov S I, Kapeliovich B L, Perelman T L 1974 J. Exp. Theor. Phys. 39 776
[27]	Chen A M, Gao X, Jiang Y F, Ding D J, Liu H, Jin M X 2009 Acta Phys. Sin. 59 10 (in Chinese)[陈安民, 高勋, 姜远飞, 丁大军, 刘航, 金明星 2009 物理学报 59 10]
[28]	Wang W T, Zhang N, Wang M W, He Y H, Yang J J, Zhu X N 2013 Acta Phys. Sin. 62 21 (in Chinese)[王文亭, 张楠, 王明伟, 何远航, 杨建军, 朱晓农 2013 物理学报 62 21]
[29]	Zhou X W, Wadley H N G, Johnson R A, Larson D J, Tabat N, Cerezo A, Petford A K, Smith G D W, Clifton P H, Martens R L, Kelly T F 2001 Acta Mater. 49 4005
[30]	Li W X 2003 One-Dimension Nonsteady Flow and Shock Waves (Beijing:National Defense Industry Press) p42 (in Chinese)[李维新 2003 一维不定常流与冲击波] (北京:国防工业出版社) 第42页]

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期刊类型引用(5)

1.	满轲，刘晓丽，宋志飞. 深部岩体半正弦应力波扰动下的层裂试验研究. 岩土工程学报. 2022(03): 428-434 . 百度学术
2.	王云天，曾祥国，陈华燕，杨鑫，王放，祁忠鹏. 钽靶板在冲击下层裂过程的数值模拟. 高压物理学报. 2021(02): 90-103 . 百度学术
3.	王云天，曾祥国，陈华燕，杨鑫，王放，祁忠鹏. 延性金属层裂自由面速度曲线特征多尺度模拟研究. 爆炸与冲击. 2021(08): 139-153 . 百度学术
4.	李不同，叶霞，姚红兵，韦朋余，丛嘉伟，朱卫华. 飞秒激光加载下NiTi形状记忆合金热效应体系研究. 稀有金属. 2020(04): 401-409 . 百度学术
5.	陶明，汪军，李占文，洪志先，王一清，赵瑞. 冲击荷载下花岗岩层裂断口细–微观试验研究. 岩石力学与工程学报. 2019(11): 2172-2181 . 百度学术

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