在玻璃转变温度以下选择350、400、475及600 K进行1 h的等温退火,用纳米压痕仪、扫描电镜等研究Cu基块状非晶晶化过程的力学性能及变形.Cu基块状非晶在纳米压头作用下体现弹-塑性变形方式,载荷-位移曲线和压痕周边多重剪切带的特征证明了塑性变形的存在.350 K退火试样具有较大的压痕硬度HV和弹性模量E值及较小的塑性变形量dn值;400 K退火后,HV和E值显著减小,dn值明显增大;475 K退火后,有少量晶体相析出,但合金以非晶的特性为主,HV和E值继续减小,dn值继续增大;600 K退火后,晶体相进一步长大和析出,其固溶强化和弥散强化使合金的HV和E值有所增加,dn值略有减小.对塑性变形机理进行了初步分析.
参考文献
| [1] | Inoue A;Nishiyama N;Amiya K et al.Ti-based amorphous alloys with a wide supercooled liquid region[J].Materials Letters,1994,19(3-4):131-135. |
| [2] | 门华,徐坚.Mg-CU-Zn-y块体金属玻璃的形成[J].金属学报,2001(12):1243-1246. |
| [3] | M. Calin;J. Eckert;L. Schultz .Improved mechanical behavior of Cu-Ti-based bulk metallic glass by in situ formation of nanoscale precipitates[J].Scripta materialia,2003(6):653-658. |
| [4] | Y.C. Kim;J. C. Lee;P. R. Cha;J. P. Ahn;E. Fleury .Enhanced glass forming ability and mechanical properties of new Cu-based bulk metallic glasses[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(2):248-253. |
| [5] | William L. Johnson .Bulk Glass-Forming Metallic alloys: Science and Technology[J].MRS bulletin,1999(10):42-56. |
| [6] | Yokoyama Y.;Fukaura K. .Fatigue Properties and Microstructures of Zr_(55)Cu_(30)Al_(10)Ni_5 Bulk Glassy Alloys[J].Materials transactions,2000(6):675-682. |
| [7] | Inoue A.;Zhang T. .Impact Fracture Energy of Bulk Amorphous Zr_(55)Al_(10)Cu_(30)Ni_5 Alloy[J].Materials transactions,1996(11):1726-1729. |
| [8] | Bruck H.A.;Rosakis A.J. .The dynamic compressive behavior of beryllium bearing bulk metallic glasses[J].Journal of Materials Research,1996(2):503-511. |
| [9] | R.Vaidyanathan;M.Dao;G.Ravichandran .STUDY OF MECHANICAL DEFORMATION IN BULK METALLIC GLASS THROUGH INSTRUMENTED INDENTATION[J].Acta materialia,2001(18):3781-3789. |
| [10] | C.A. Schuh;T.G. Nieh .A nanoindentation study of serrated flow in bulk metallic glasses[J].Acta materialia,2003(1):87-99. |
| [11] | 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. |
| [12] | A.L. Greer;A. Castellero;S.V. Madge .Nanoindentation studies of shear banding in fully amorphous and partially devitrified metallic alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(0):1182-1185. |
| [13] | D. Drozdz;T. Kulik;H.J. Fecht .Nanoindentation studies of Zr-based bulk metallic glasses[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2007(1/2):62-65. |
| [14] | 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. |
| [15] | R. Bhowmick;R. Raghavan;K. Chattopadhyay .Plastic flow softening in a bulk metallic glass[J].Acta materialia,2006(16):4221-4228. |
| [16] | L. Liu;K. C. Chan .Plastic deformation of Zr-based bulk metallic glasses under nanoindentation[J].Materials Letters,2005(24/25):3090-3094. |
| [17] | Lubhorsky F E;柯成;唐与湛;罗阳,.非晶态合金[M].北京:冶金工业出版社,1989:250-340. |
| [18] | 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. |
| [19] | Chen H S;Inoue A;Masumoto T .Two-stage enthalpy relaxation behaviour of (Fe0.5Ni0.5)83P17 and (Fe0.5Ni0.5)83B17 amorphous alloys upon annealing[J].Journal of Materials Science,1985,20(07):2417-2438. |
| [20] | Cohen M H;Grest G S .Liquid-glass wansition,a free-volume approach[J].Physical Review B:Condensed Matter,1979,20(03):1077-1098. |
| [21] | Grest G S;Cohen M H .Liquid-glass transition:Dependence of the glass transition on heating and cooling rates[J].Physical Review B:Condensed Matter,1980,21(09):4113-4117. |
| [22] | 苏勇,吴炜,陈翌庆,张红,高瑞平.非晶Al-Y-Nd-Ni合金的晶化行为[J].特种铸造及有色合金,2004(01):24-25. |
| [23] | 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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