采用ABAQUS软件对Cu-38Zn合金不同尺寸的试样平行模压和交叉模压两种形变过程进行有限元模拟，观察模压形变后试样的显微组织，研究Cu-38Zn合金经模压形变后的微观组织与等效应变的关系。结果表明：经模压形变后Cu-38Zn合金的晶粒细化不但与模压形变时积累的等效应变有关，而且与模压形变时变形场的复杂性和试样的尺寸有关。Cu-38Zn合金的晶粒尺寸随着等效应变的增大而减小，但是在相同的等效应变下，复杂的变形场具有更有效的晶粒细化效果；较大尺寸的试样具有更多的孪晶组织。
The parallel constrained groove pressing and the cross constrained groove pressing were imposed on a Cu-38Zn alloy sheet with different sizes numerically and experimentally. The relationship between the microstructure and equivalent strain of the Cu-38Zn alloy was investigated. It is found that the grain reduction of a Cu-38Zn alloy subjected to both constrained groove pressing is not only related to the accumulated equivalent strain but also related to the complexity of the deformation field and the specimen size. With the increase of the equivalent strain, the grain size of the Cu-38Zn alloy decreases. However, the cross-orientation pressing procedure results in finer grains than the single-orientation pressing procedure even though both pressings have the same equivalent strain. The larger the specimen size is, the more the twin in the specimen is.
参考文献
| [1] | 索涛,李玉龙.等径通道挤压中晶粒细化影响因素的研究进展[J].材料科学与工程学报,2004(01):132-137. |
| [2] | 刘建军,王爱民,张海峰,丁炳哲,胡壮麒.高压原位合成块体纳米Mg-Zn合金[J].材料研究学报,2001(03):299-302. |
| [3] | 王素梅,孙康宁,毕见强.大塑性变形法制备块体纳米材料[J].金属热处理,2003(05):5-7. |
| [4] | Akihiro Yamashita;Daisuke Yamaguchi;Zenji Horita;Terence G. Langdon .Influence of pressing temperature on microstructural development in equal-channel angular pressing[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(1):100-106. |
| [5] | Ruslan Z. Valiev;Terence G. Langdon .Principles of equal-channel angular pressing as a processing tool for grain refinement[J].Progress in materials science,2006(7):881-981. |
| [6] | Mohamed FA.;Xun YW. .On the minimum grain size produced by milling Zn-22%Al[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):178-185. |
| [7] | JAZAERI H;HUMPHREYS F J .The transition from discontinuous to continuous recrystallization in some aluminium alloys:Ⅰ-The deformed state[J].Acta Materialia,2004,52:3239-3250. |
| [8] | J. R. Bowen;P. B. Prangnell .Microstructural evolution during formation of ultrafine grain structures by severe deformation[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2000(11/12):1246-1250. |
| [9] | A. Krishnaiah;Uday Chakkingal;P. Venugopal .Production of ultrafine grain sizes in aluminium sheets by severe plastic deformation using the technique of groove pressing[J].Scripta materialia,2005(12):1229-1233. |
| [10] | A. Krishnaiah;U. Chakkingal;P. Venugopal .Applicability of the groove pressing technique for grain refinement in commercial purity copper[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(0):337-340. |
| [11] | PENG K;SU L;SHAW L L;QIAN K W .Grain refinement and crack prevention in constrained groove pressing of two-phase Cu-Zn alloys[J].Scripta Materialia,2007,56(11):987-990. |
| [12] | Khodabakhshi, F.;Kazeminezhad, M.;Kokabi, A.H. .Constrained groove pressing of low carbon steel: Nano-structure and mechanical properties[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(16/17):4043-4049. |
| [13] | Peng, K.;Mou, X.;Zeng, J.;Shaw, L.L.;Qian, K.-W. .Equivalent strain, microstructure and hardness of H62 brass deformed by constrained groove pressing[J].Computational Materials Science,2011(4):1526-1532. |
| [14] | MEYERS M A;CHAWLA K K.Mechanical metallurgy:principles and applications[M].Englewood Cliffs,NJ:Prentice-Hall,1984 |
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