对Mg61Cu28Gd11块体非晶在其玻璃转变温度以下温度(325、350、375和400 K)等温退火1 h,用X射线衍射仪(XRD)、差热扫描量热仪(DSC)、纳米压痕仪、扫描电子显微镜(SEM)、显微维氏硬度计等分析研究了低温退火对其热稳定性、微区力学性能及变形的影响,并分析了塑性变形机理.结果表明,低温退火后非晶原子的短程有序性增加,非晶结构的稳定性变差,并在400K发生部分晶化.同时,在325～375 K范围内,显微硬度和弹性模量E随退火温度的升高而增大,塑性变形量Dn和最大压入深度Dmax减小;400 K退火后,由于少量析出的晶体相与压头下新产生的自由体积相互作用,合金抵抗变形能力减弱,显微硬度和弹性模量E降低,Dn和Dmax提高.
参考文献
| [1] | 块体非晶合金的新进展[J].金属功能材料,2003(01):40-40. |
| [2] | Li Z G;Hui X;Zhang C M et al.Formation of Mg-Cu-Zn-Y bulk metallic galsses with compressive strength over gigapascal[J].Journal of Alloys and Compounds,2008,454(1-2):168-173. |
| [3] | 袁广银,尹健,丁文江.Mg-Cu-Ni-Gd非晶合金结构弛豫及力学性能[J].金属学报,2008(02):222-226. |
| [4] | CHEN Gang,M. FERRY.Crystallization of Mg-based bulk metallic glass[J].中国有色金属学会会刊（英文版）,2006(04):833-837. |
| [5] | 黎业生,吴子平,董定乾,刘柏雄.Mg65Cu25Y10非晶态合金的形成及其晶化行为[J].材料热处理学报,2006(02):20-23. |
| [6] | Yuan G Y;Inoue A .The effect of Ni substitution on the glass-forming ability and mechanical properties of Mg-Cu-Gd metallic alloys[J].Journal of Alloys and Compounds,2005,387(1-2):134-138. |
| [7] | Z.G. Li;X. Hui;C.M. Zhang .Strengthening and toughening of Mg-Cu-(Y, Gd) bulk metallic glasses by minor addition of Be[J].Materials Letters,2007(28):5018-5021. |
| [8] | D.G. Pan;W.Y. Liu;H.F. Zhang .Mg-Cu-Ag-Gd-Ni bulk metallic glass with high mechanical strength[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2007(1/2):142-144. |
| [9] | 张泰华.微/纳米力学测试技术及其应用[M].北京:机械工业出版社,2005 |
| [10] | Drozdz D;Kulik T;Fecht H J .Nanoindentation studies of Zr-basad bulk metallic glasses[J].Journal of Alloys and Compounds,2007,441(1-2):62-65. |
| [11] | Yao Ke-fu;Zhang Chang-qing .Plastic deformation behavior of Fe40 Ni40 P14 B6 bulk metallic glass investigated by nanoindentatian[J].Journal of University of Science and Technology Beijing,2007,14(z1):68-72. |
| [12] | N.K. Mukhopadhyay;A. Belger;P. Paufler .Nanoindentation studies on Cu-Ti-Zr-Ni-Si-Sn bulk metallic glasses[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(0):954-957. |
| [13] | Q.K. Jiang;X.P. Nie;J.Z. Jiang;N. Deyneka-Dupriez;H.-J. Fecht .Room-temperature nanoindentation measurements of La-based bulk metallic glass[J].Scripta materialia,2007(2):149-152. |
| [14] | S.X. Song;J.S.C. Jang;T.G. Nieh .Analyses of shear band emission in a Mg-based bulk metallic glass deformed at different nanoindentation rates[J].Intermetallics,2008(5):676-681. |
| [15] | A. Castellero;S.J. Lloyd;S.V. Madge .Shear-band propagation in fully amorphous and partially crystallized Mg-based alloys studied by nanoindentation and transmission electron microscopy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2007(0):48-51. |
| [16] | Oliver W C;Pharr G M .An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments[J].Materials Research Society,1992,7(06):1564-1583. |
| [17] | 李春燕,寇生中,胡勇,丁雨田,许广济.Cu基块状非晶晶化过程的微区变形及力学性能[J].中国有色金属学报,2007(10):1586-1591. |
| [18] | Christopher A. Schuh;Alan C. Lund;T.G. Nieh .New regime of homogeneous flow in the deformation map of metallic glasses: elevated temperature nanoindentation experiments and mechanistic modeling[J].Acta materialia,2004(20):5879-5891. |
| [19] | C.A. Schuh;T.G. Nieh .A nanoindentation study of serrated flow in bulk metallic glasses[J].Acta materialia,2003(1):87-99. |
| [20] | Lubhorsky F E.非晶态合金[M].北京:冶金工业出版社,1989 |
| [21] | Xing LQ.;Dallas JP.;Cornet M.;Bertrand C. .Nanocrystal evolution in bulk amorphous Zr57Cu20Al10Ni8Ti5 alloy and its mechanical properties[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1/2):216-225. |
| [22] | Q.K. Jiang;X.P. Nie;J.Z. Jiang;N. Deyneka-Dupriez;H.-J. Fecht .Room-temperature nanoindentation measurements of La-based bulk metallic glass[J].Scripta materialia,2007(2):149-152. |
| [23] | Greer AL. .Partially or fully devitrified alloys for mechanical properties[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2001(0):68-72. |
| [24] | 武晓峰,张海峰,李宏,王爱民,杨洪才,胡壮麒.Zr基大块非晶合金的微区变形及力学性能[J].中国有色金属学报,2003(06):1368-1373. |
| [25] | Ramamurty U;Jana S;Kawamura Y;Chattopadhyay K .Hardness and plastic deformation in a bulk metallic glass[J].Acta materialia,2005(3):705-717. |
| [26] | R. Bhowmick;R. Raghavan;K. Chattopadhyay .Plastic flow softening in a bulk metallic glass[J].Acta materialia,2006(16):4221-4228. |
| [27] | Argon A S .Plastic deformation in metallic glaases[J].Acta Metallurgica,1979,27(04):47-58. |
| [28] | Spaepen F .A microscopic mechanism for steady state inhomogeneous flow in metallic glasses[J].Acta Metallurgica,1982,30(07):447-452. |
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