赵燕春,寇生中,王仁军,索红莉,丁雨田

• 1:兰州理工大学甘肃省有色金属新材料省部共国家重点实验室
• 2:北京工业大学材料学院国家教育部功能材料重点实验室

摘要(Abstract)：

采用悬浮熔炼-铜模吸铸法制备了Cu50Zr42Al8块体金属玻璃,研究了其楔形试样的组织演变。随着熔体凝固过程中冷却速度的变化,楔形试样中存在表面全非晶区,中心晶体区以及二者之间的过渡区域,并确定Cu50Zr42Al8块体金属玻璃临界尺寸为4.8mm。分别考察了4mm铸态完全非晶棒和5mm非晶复合棒的力学性能。4mm非晶棒的压缩断裂强度,弹性应变和塑性应变分别为2260MPa,2.0%,0.4%,几乎没有塑性变形。而5mm铸态非晶复合棒的屈服强度、断裂强度分别为1670MPa、1849MPa,弹性应变和塑性应变分别为1.6%和1.9%。非晶基体中存在的马氏体相CuZr和正交晶相Cu10Zr7的竞争影响了非晶复合棒的最终力学行为。

关键词(KeyWords)： 铜基块体非晶;冷却速度;组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): supportby the National Natural Science Foundation of China(Grant No.50371016);; the Funds for International Cooperation and Exchange of the National Natural Science Foundation of China(Grant No.50611130629)

作者(Author): 赵燕春,寇生中,王仁军,索红莉,丁雨田

DOI: 10.13289/j.issn.1009-6264.2010.09.013

参考文献(References)：

• [1]Inoue A,Zhang W,Zhang T,et al.High-strength Cu-based bulk glassy alloys in Cu-Zr-Ti and Cu-Hf-Ti ternary systems[J].Acta Materialia,2001,49(14):2645-2652.
• [2]Calin M,Eckert J,Schultz L.Improved mechanical behavior of Cu-Ti-based bulk metallic glass by in situ formation of nanoscale precipitates[J].Scripta Materialia,2003,48(6):653-658.
• [3]Donghua Xu,Boonrat Lohwongwatana,Gang Duan,et al.Bulk metallic glass formation in binary Cu-rich alloy series Cu100-xZrx(x=34,36,38.2,40at%)and mechanical properties of bulk Cu64Zr36glass[J].Acta Materialia,2004,52(9):2621-2624.
• [4]Kim Y C,Lee J C,Cha P R,et al.Enhanced glass forming ability and mechanical propertiesof new Cu-based bulk metallic glasses[J].Materials Science and Engineering A,2006,437(2):248-253.
• [5]Tang M B,Zhao D Q,Pan M X,et al.Binary Cu-Zr bulk metallic glasses[J].Chinese Physics Letters,2004,21(5):901-903.
• [6]Inoue A,Zhang W.Formation,thermal stability and mechanical properties of Cu-Zr-Al bulk glassy alloys[J].Materials Transactions,2002,43(11):2921-2925.
• [7]Ou X,Roseker W,Saksl K.Microstructure and crystallization in Cu50Zr45Al5metallic glass[J].Journal of Alloys and Compounds,2007,441(1-2):185-188.
• [8]Das J,Tang M B,Kim K B,et al.“Work-hardenable”ductile bulk metallic glass[J].Physical Review Letters,2005,94(20):205501-5.
• [9]Das J,Kim K B,Xu W,et al.Ductile metallic glasses in supercooled martensitic alloys[J].Materials Transactions,2006,47(10):2606-2609.
• [10]Pauly S,Das J,Bednarcik J,et al.Deformation-induced martensitic transformationin Cu-Zr-(Al,Ti)bulk metallic glass composites[J].Scripta Materialia,2009,60(6):431-434.
• [11]Jiang F,Zhang D H,Zhang L C,et al.Microstructure evolution and mechanical properties of Cu46Zr47Al7bulk metallic glass composite containing CuZr crystallizing phases[J].Materials Science and Engineering A,2007,467(1-2):139-145.
• [12]Sun Y F,Wei B C,Wang Y R,et al.Plasticity-improved Zr-Cu-Al bulk metallic glass matrix composites containing martensite phase[J].Applied Physics Letters,2005,87(5):051905-8.
• [13]Xing L Q,Ochin P.Investigation of the effects of Al and Ti on the glass forming ability of Zr-Cu-Al and Zr-Ti-Cu-Al-Ni alloys through their solidification characteristics[J].Acta Materialia,1997,45(9):3765-3774.
• [14]Wright W J,Saha R,Nix W D.Deformation mechanisms of the Zr40Ti14Ni10Cu12Be24bulk metallic glass[J].Materials Transactions JIM,2001,42(4):642-649.
• [15]Liu C T,Heatherly L,Easton D S,et al.Test environments and mechanical properties of Zr-Base bulk amorphous alloys[J].Metallurgical and Materials Transactions A,1998,29(7):1811-1820.
• [16]Yuan Guang-yin,Inoue A.The effect of Ni substitution on the glass-forming ability and mechanical of properties of Mg-Cu-Gd metallic glass alloys[J].Journal of Alloys and Compounds,2005,387(1-2):134-138.
• [17]Kusy M,Kühn U,Concustell A,et al.Fracture surface morphology of compressed bulk metallic glass-matrix-composites and bulk metallic glass[J].Intermetallics,2006,14(8-9):982-986.

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