金属玻璃温度依赖的拉压屈服不对称研究

陈艳; 蒋敏强; 戴兰宏

doi:10.7498/aps.61.036201

摘要

通过引入静水应力对自由体积演化的影响, 研究了金属玻璃在不同温度下的拉压屈服行为. 结果表明, 在拉伸和压缩载荷下, 屈服强度均满足(T/Tg)1/2的温度依赖关系; 同时, 在不同温度下, 材料的压力敏感系数保持为常值0.1. 随着温度的升高, 压力对自由体积的影响逐渐降低, 从而导致材料的拉压屈服不对称性逐渐趋于不显著. 在高温下, 显著的结构弛豫减缓了自由体积增长速率从而抑制材料迅速屈服. 这些结果将有助于更深入的认识金属玻璃屈服及其拉压不对称性的内在机理.

关键词:

Abstract

By taking the pressure effect into account in the free volume evolution, the yield asymmetry between tension and compression of metallic glasses under different temperatures is investigated. The yield strength in MGs with a (T/Tg)1/2 temperature dependence is obtained for both tension and compression. The pressure - sensitive factor is derived to be a constant ～ 0.1 within a broad range of temperatures. Furthermore, it is revealed that, the declining effect of pressure on the free volume evolution causes a weaker tension - compression asymmetry with increasing temperature. The significant structural relaxation at high temperature slows down the free volume evolution and hinders the sharp yield. These results improve our understanding of the underlying mechanisms of the yielding and its asymmetry between tension and compression in MGs.

Keywords:

metallic glass /
yield /
asymmetry between tension and compression /
free volume

作者及机构信息

1.
中国科学院力学研究所, 非线性力学国家重点实验室, 北京 100190

基金项目: 国家自然科学基金(批准号: 10725211, 11002144, 11021262)、国家自然科学基金委员会-中国工程物理研究院联合基金资助项目 (批准号: 10976100)和国家重点基础研究发展(批准号: 2009CB724401)资助的课题.

Authors and contacts

1.
State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China

Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 10725211, 11002144, 11021262, 11132011), the National Natural Science Foundation of China-NSAF (Grant No. 10976100), and the National Basic Research Program of China (Grant Nos. 2009CB724401, 2012CB937500).

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施引文献

[1]	Wang W H, Dong C, Shek C H 2004 Mater. Sci. Eng. R 44 45
[2]	Yao K F, Ruan F, Yang Y Q, Chen N 2006 Appl. Phys. Lett. 88 122106
[3]	Li G, Liu J, Liu R P 2007 Chin. Phys. Lett. 24 2323
[4]	Dai L H, Bai Y L 2008 Int. J. Impact Eng. 35 704
[5]	Wang X Y, Chen Y, Zhang N Y, Zhao L P, Pang Y T, Wang W K 2007 Acta Phys. Sin. 56 4004 (in Chinese)[ 王秀英, 陈莹, 张宁玉, 赵丽萍, 庞岩涛, 王文魁 2007 物理学报 56 4004]
[6]	Guo G Q, Yang L, Zhang G Q 2011 Acta Phys. Sin. 60 016103 (in Chinese)[郭古青, 杨亮, 张国庆 2007 物理学报 60 016103]
[7]	Jiang M Q, Ling Z, Meng J X, Dai L H 2008 Philos. Mag. 88 407
[8]	Meng J X, Ling Z, Jiang M Q, Zhang H S, Dai L H 2008 Appl. Phys. Lett. 92 171909
[9]	Schuh C, Hufnagel T, Ramamurty U 2007 Acta Mater. 55 4067
[10]	Trexler M M, Thadhani N N 2010 Prog. Mater. Sci. 55 759
[11]	Chen M W 2008 Annu. Rev. Mater. Res. 38 445
[12]	Schuh C A, Lund A C 2003 Nat. Mater. 2 449
[13]	Flores K M, Dauskardt R H 2001 Acta Mater. 49 2527
[14]	Ott R T, Sansoz F, Jiao T, Warner D, Fan C, Molinari J F, Ramesh K T, Hufnagel T C 2006 Metall. Mater. Trans. A 37 3251
[15]	Hsueh C H, Bei H, Liu C T, Becher P F, George E P 2008 Scr. Mater. 59 111
[16]	Cohen M H, Turnbull D 1959 J. Chem. Phys. 31 1164
[17]	Zong H T, Ma M Z, Zhang X Y, Qi L, Li G, Jing Q, Liu R P 2011 Chin. Phys. Lett. 28 036103
[18]	Anand L, Su C 2005 J. Mech. Phys. Solids 53 1362
[19]	Zhang Z F, Eckert J, Schultz L 2003 Acta Metall. 51 1167
[20]	Lu J, Ravichandran G, Johnson W L 2003 Acta Mater. 51 3429
[21]	Johnson W, Samwer K 2005 Phys. Rev. Lett. 95 195501
[22]	Prasad E K, Raghavan R, Ramamurty U 2007 Scr. Mater. 57 121
[23]	Sun L, Jiang M Q, Dai L H 2010 Scr. Mater. 63 945
[24]	Spaepen F 1977 Acta Metall. 25 407
[25]	Huang R, Suo Z, Prevost J H, NixWD 2002 J. Mech. Phys. Solids 50 1011
[26]	Gao Y F 2006 Modelling Simul. Mater. Sci. Eng. 14 1329
[27]	Keryvin V 2008 J. Phys. 20 114119
[28]	Steif P S 1983 J. Mech. Phys. Solids 31 359
[29]	Launey M E, Kruzic J J, Li C, Busch R 2007 Appl. Phys. Lett. 91 051913
[30]	Li F, Liu X, Hou H, Chen G, Li M 2009 Intermetallics 17 98
[31]	Sietsma J, Thijsse B J 1995 Phys. Rev. B 52 3248
[32]	Wang J G, Zhao D Q, Pan M X, Wang W H, Song S X, Nieh T G 2010 Scr. Mater. 62 477
[33]	Yang Q, Mota A, Ortiz M 2005 Comput. Mech. 37 194
[34]	Jiang M Q, Dai L H 2009 J. Mech. Phys. Solids 57 1267
[35]	Lund A C, Schuh C A 2003 Acta Metall. 51 5399
[36]	Packard C E, Schuh C A 2007 Acta Mater. 55 5348

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