研究等温退火和预压处理对 Cu36Zr48Al8Ag8大块非晶合金力学性能的共同影响。首先，将铸态样品在743 K 退火10 min，然后对退火后的样品进行预压处理，在800 MPa 压力下分别预压1、3、5和10 h。结果表明，退火处理后在非晶基体中形成了尺寸为10 nm 左右的纳米晶并极大地湮灭了自由体积，从而导致大块非晶合金完全丧失塑性。在800 MPa 下预压处理合适的时间(5 h)可以部分地恢复自由体积，进而部分地恢复大块非晶合金的塑性。而过长的预压时间(10 h)将导致自由体积的再次减小，主要源于纳米晶的过分长大。
The combined effects of isothermal annealing and pre-compression on the mechanical properties of Cu36Zr48Al8Ag8 bulk metallic glass (BMG) were investigated. The as-cast specimens were first annealed at 743 K for 10 min, and then pre-compressed under 800 MPa for 1, 3, 5 and 10 h, respectively. The results indicated that annealing resulted in the formation of nanocrystals with a diameter of ~10 nm in the amorphous matrix and a drastic decrease of the free volume, leading to complete loss of the plasticity of the BMG. Applying pre-compression under a stress of 800 MPa for a proper duration (5 h) resumed part of the lost free volume in the BMG matrix and therefore partially recovered the plasticity. A very long period of pre-compression (10 h) decreased the free volume again, which was caused by the excessive crystal growth.
参考文献
| [1] | A. Lindsay Greer.Metallic Glasses[J].Science,19955206(5206):1947-1953. |
| [2] | A.Inoue.Stabilization of metallic supercooled liquid and bulk amorphous alloys[J].Acta materialia,20001(1):279-306. |
| [3] | Wei Hua Wang.Roles of minor additions in formation and properties of bulk metallic glasses[J].Progress in materials science,20074(4):540-596. |
| [4] | Christopher A. Schuh;Todd C. Hufnagel;Upadrasta Ramamurty.Mechanical behavior of amorphous alloys[J].Acta materialia,200712(12):4067-4109. |
| [5] | A. Inoue;W. Zhang;T. Tsurui.Unusual room-temperature compressive plasticity in nanocrystal-toughened bulk copper-zirconium glass[J].Philosophical Magazine Letters,20055(5):221-229. |
| [6] | N. Van Steenberge;A. Concustell;J. Sort.Microstructural inhomogeneities introduced in a Zr-based bulk metallic glass upon low-temperature annealing[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20081/2(1/2):124-130. |
| [7] | H. Kato;K. Yubuta;D.V. Louzguine.Influence of nanoprecipitation on strength of Cu_(60)Zr_(30)Ti_(10) glass containing mu m-ZrC particle reinforcements[J].Scripta materialia,20046(6):577-581. |
| [8] | Min Song;Xiaozhou Liao;Yuehui He.Effect of sub-T_g annealing on the mechanical properties of a ZrAlNiCuNb bulk metallic glass[J].Philosophical Magazine Letters,201111/12(11/12):713-723. |
| [9] | G. Kumar;D. Rector;R.D. Conner.Embrittlement of Zr-based bulk metallic glasses[J].Acta materialia,200912(12):3572-3583. |
| [10] | U. Ramamurty;M. L. Lee;J. Basu;Y. Li.Embrittlement of a bulk metallic glass due to low-temperature annealing[J].Scripta materialia,20022(2):107-111. |
| [11] | Wu FF;Zhang ZF;Mao SX;Peker A;Eckert J.Effect of annealing on the mechanical properties and fracture mechanisms of a Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5 bulk-metallic-glass composite[J].Physical review, B. Condensed matter and materials physics,200713(13):4201-1-4201-11-0. |
| [12] | Dmowski W;Fan C;Morrison ML;Liaw PK;Egami T.Structural changes in bulk metallic glass after annealing below the glass-transition temperature[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20071-2(1-2):125-129. |
| [13] | Song, M.;Li, Y.-Q.;Wu, Z.-G.;He, Y.-H..The effect of annealing on the mechanical properties of a ZrAlNiCu metallic glass[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,20113(3):1239-1241. |
| [14] | P. Murali;U. Ramamurty.Embrittlement of a bulk metallic glass due to sub-T_g annealing[J].Acta materialia,20055(5):1467-1478. |
| [15] | John J. Lewandowski.Effects of Annealing and Changes in Stress State on Fracture Toughness of Bulk Metallic Glass[J].Materials transactions,20014(4):633-637. |
| [16] | Ji Gu;Min Song;Song Ni;Shengfeng Guo;Yuehui He.Effects of annealing on the hardness and elastic modulus of a Cu_(36)Zr_(48)Al_8Ag_8 bulk metallic glass[J].Materials & design,2013May(May):706-710. |
| [17] | Sun, Y.Y.;Song, M.;Liao, X.Z.;Sha, G.;He, Y.H..Effects of isothermal annealing on the microstructures and mechanical properties of a FeCuSiBAl amorphous alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2012:145-151. |
| [18] | 吴宏;刘咏;李开洋;赵中伟.铸造效应引发的块体非晶合金压缩脆性[J].中国有色金属学报（英文版）,2014(2):385-392. |
| [19] | Yongjiang Huang;Wei Zheng;Hongbo Fan.The effects of annealing on the microstructure and the dynamic mechanical strength of a ZrCuNiAl bulk metallic glass[J].Intermetallics,2013:192-197. |
| [20] | Y.B. Wang;D.D. Qu;X.H. Wang.Introducing a strain-hardening capability to improve the ductility of bulk metallic glasses via severe plastic deformation[J].Acta materialia,20121(1):253-260. |
| [21] | J.W. Liu;Q.P. Cao;L.Y. Chen.Shear band evolution and hardness change in cold-rolled bulk metallic glasses[J].Acta materialia,201014(14):4827-4840. |
| [22] | M. Stolpe;J.J. Kruzic;R. Busch.Evolution of shear bands, free volume and hardness during cold rolling of a Zr-based bulk metallic glass[J].Acta materialia,2014:231-240. |
| [23] | Chang-Myeon Lee;Kyoung-Won Park;Jae-Chul Lee.Plasticity improvement of a bulk amorphous alloy based on its viscoelastic nature[J].Scripta materialia,20088(8):802-805. |
| [24] | Y.ZHANG;W.H.WANG;A.L.GREER.Making metallic glasses plastic by control of residual stress[J].Nature materials,200611(11):857-860. |
| [25] | Yu P;Bai HY;Zhao JG;Jin CQ;Wang WH.Pressure effects on mechanical properties of bulk metallic glass[J].Applied physics letters,20075(5):51906-1-51906-3-0. |
| [26] | H.B. Yu;J. Hu;X.X. Xia.Stress-induced structural inhomogeneity and plasticity of bulk metallic glasses[J].Scripta materialia,20098(8):640-643. |
| [27] | Kyoung-Won Park;Chang-Myeon Lee;Masato Wakeda.Elastostatically Induced structural disordering in amorphous alloys[J].Acta materialia,200819(19):5440-5450. |
| [28] | H.B. Ke;P. Wen;H.L. Peng.Homogeneous deformation of metallic glass at room temperature reveals large dilatation[J].Scripta materialia,201110(10):966-969. |
| [29] | Lee SC;Lee CM;Yang JW;Lee JC.Microstructural evolution of an elastostatically compressed amorphous alloy and its influence on the mechanical properties[J].Scripta materialia,20087(7):591-594. |
| [30] | Y. Tong;W. Dmowski;Z. Witczak.Residual elastic strain induced by equal channel angular pressing on bulk metallic glasses[J].Acta materialia,20134(4):1204-1209. |
| [31] | Y. Tong;W. Dmowski;Y. Yokoyama.Recovering compressive plasticity of bulk metallic glasses by high-temperature creep[J].Scripta materialia,20138(8):570-573. |
| [32] | Yvonne Ritter;Karsten Albe.Thermal annealing of shear bands in deformed metallic glasses: Recovery mechanisms in Cu_(64)Zr_(36) studied by molecular dynamics simulations[J].Acta materialia,201118(18):7082-7094. |
| [33] | A. Concustell;S. Godard-Desmarest;M.A. Carpenter.Induced elastic anisotropy in a bulk metallic glass[J].Scripta materialia,201112(12):1091-1094. |
| [34] | K. Hajlaoui;T. Benameur;G. Vaughan.Thermal expansion and indentation-induced free volume in Zr-based metallic glasses measured by real-time diffraction using synchrotron radiation[J].Scripta materialia,20049(9):843-848. |
| [35] | Yuanli Xu;Horst Hahn;Jiangong Li.Effects of room-temperature rolling on microstructure and crystallization behavior of Zr_(55)Cu_(40)Al_5 metallic glass[J].Intermetallics,201011(11):2039-2043. |
| [36] | S. Xie;E.P. George.Hardness and shear band evolution in bulk metallic glasses after plastic deformation and annealing[J].Acta Materialia,200818(18):5202-5213. |
| [37] | R. Bhowmick;R. Raghavan;K. Chattopadhyay.Plastic flow softening in a bulk metallic glass[J].Acta materialia,200616(16):4221-4228. |
| [38] | K. Wang;T. Fujita;Y. Q. Zeng.Micromechanisms of serrated flow in a Ni_(50)Pd_(30)P_(20) bulk metallic glass with a large compression plasticity[J].Acta Materialia,200812(12):2834-2842. |
| [39] | Dongchan Jang;Julia R. Greer.Transition from a strong-yet-brittle to a stronger-and-ductile state by size reduction of metallic glasses[J].Nature materials,20103(3):215-219. |
| [40] | W. ZHENG;Y.J. HUANG;G.Y. WANG.Influence of Strain Rate on Compressive Deformation Behavior of a Zr-Cu-Ni-AI Bulk Metallic Glass at Room Temperature[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,20116(6):1491-1498. |
| [41] | Kyoung-Won Park;Jae-il Jang;Masato Wakeda.Atomic packing density and its influence on the properties of Cu-Zr amorphous alloys[J].Scripta materialia,20079(9):805-808. |
| [42] | S. Ni;Y.B. Wang;X.Z. Liao.The effect of dislocation density on the interactions between dislocations and twin boundaries in nanocrystalline materials[J].Acta materialia,20126/7(6/7):3181-3189. |
| [43] | Chen, MW.Mechanical behavior of metallic glasses: Microscopic understanding of strength and ductility[J].Annual review of materials research,2008:445-469. |
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