We investigated the effects of heating rate on the process parameters of superplastic forming for Zr55Cu30Al10Ni5 by differential scanning calorimetry. The continuous heating and isothermal annealing analyses suggested that the temperatures of glass transition and onset crystallization are heating rate-dependent in the supercooled liquid region. Then, the time-temperature-transformation diagram under different heating rates indicates that increasing the heating rate can lead to an increase of the incubation time at the same anneal temperature in the supercooled liquid region. Based on the Arrhenius relationship, we discovered that the incubation time increases by 1.08-1.11 times with double increase of the heating rate at the same anneal temperature, and then verified it by the data of literatures and the experimental results. The obtained curve of the max available incubation time reveals that the incubation time at a certain anneal temperature in the supercooled liquid region is not infinite, and will increase with increasing heating rate until this temperature shifts out of the supercooled liquid region because of exceeding critical heating rate. It is concluded that heating rate must be an important processing parameter of superplastic forming for Zr55Cu30Al10Ni5.
参考文献
| [1] | A. Inoue;A. Takeuchi .Recent progress in bulk glassy, nanoquasicrystalline and nanocrystalline alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(0):16-30. |
| [2] | L. Liu;Z.F. Wu;J. Zhang .Crystallization kinetics of Zr_(55)Cu_(30)Al_(10)Ni_5 bulk amorphous alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2002(1/2):90-95. |
| [3] | Hidemi Kato;Akihisa Inoue;H. S. Chen .Heating and structural disordering effects of the nonlinear viscous flow in a Zr_(55)Al_(10)Ni_(5)Cu_(30) bulk metallic glass[J].Applied physics letters,2003(26):5401-5403. |
| [4] | Yu-Lai Gao;Jun Shen;Jian-Fei Sun .Crystallization behavior of ZrAlNiCu bulk metallic glass with wide supercooled liquid region[J].Materials Letters,2003(13/14):1894-1898. |
| [5] | R.Busch;E.Bakke;W.L.Johnson .Viscosity of the supercooled liquid and relaxation at the glass transition of the Zr_46.75Ti_8.25Cu_7.5Ni_10Be_27.5 bulk metallic glass Forming alloy[J].Acta materialia,1998(13):4725-4732. |
| [6] | Myung WN.;Hwang IS.;Kim HG.;Zhang T.;Inoue A.;Greer AL.;Ryu SP. .Viscous flow behavior of bulk amorphous Zr55Al10Ni5Cu30 alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2001(0):691-695. |
| [7] | Jan Schroers;Tranquoc Nguyen;Sean O'Keeffe;Amish Desai .Thermoplastic forming of bulk metallic glass—Applications for MEMS and microstructure fabrication[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1/2):898-902. |
| [8] | Jan Schroers;Quoc Pham;Amish Desai .Thermoplastic Forming of Bulk Metallic Glass - A Technology for MEMS and Micro structure Fabrication[J].Journal of Microelectromechanical Systems: A Joint IEEE and ASME Publication on Microstructures, Microactuators, Microsensors, and Microsystems,2007(2):240-247. |
| [9] | L. Liu;K. C. Chan;T. Zhang .The effect of temperature on the crystallization of Zr_(55)Cu_(30)Al_(10)Ni_5 bulk metallic glass in the glass transition region[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2005(1/2):114-121. |
| [10] | J. SHEN;G.WANG;J.F. SUN .Superplastic deformation behavior of Zr_(41.25)Ti_(13.75)Ni_(10)Cu_(12.5)Be_(22.5) bulk metallic glass in the supercooled liquid region[J].Intermetallics,2005(1):79-85. |
| [11] | William L. Johnson;Georg Kaltenboeck;Marios D. Demetriou;Joseph P. Schramm;Xiao Liu;Konrad Samwer;C. Paul Kim;Douglas C. Hofmann .Beating Crystallization in Glass-Forming Metals by Millisecond Heating and Processing[J].Science,2011(TN.6031):828-833. |
| [12] | F.X. QIN;H.F. ZHANG;B.Z. DING .Nanocrystallization kinetics of Ni-based bulk amorphous alloy[J].Intermetallics,2004(10/11):1197-1203. |
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