在电子万能试验机上对铸态AM60镁合金进行室温压缩试验,研究了在变形量分别为3.3%,10%,12%,20%,26%以及变形速率为0.2,0.5,2,5 mm/min时压缩变形组织中孪晶的形态.结果表明:在塑性变形初期,只有少量晶粒内出现孪晶,孪晶较宽;而在变形末期,孪晶几乎分布于所有晶粒中,且出现了细而长的孪晶.随着变形速率的增大,孪晶变细,并且孪晶的密度增大,试样的屈服强度、抗压强度都升高.
参考文献
| [1] | 刘正;张奎;曾小勤.镁基轻质合金理论基础及其应用[M].北京:机械工业出版社,2002 |
| [2] | 陈振华;严红革;陈吉华.镁合金[M].北京:化学工业出版社,2004 |
| [3] | 宋孚群,张青来,徐永超,张坤,张士宏,王忠堂.变形镁合金晶粒细化及热处理后的组织和性能[J].金属成形工艺,2004(03):46-49. |
| [4] | Máthis K;Chmelík F;Trojamová Z et al.Investigation of some magnesium alloys by use of the acoustic emission technigue[J].Materials Science and Engineering,2004,387-389:331-335. |
| [5] | Staroselsky A.;Anand L. .A constitutive model for hcp materials deforming by slip and twinning: application to magnesium alloy AZ31B[J].International Journal of Plasticity,2003(10):1843-1864. |
| [6] | J. Bohlen;F. Chmelfk;P. Dobron .Orientation effects on acoustic emission during tensile deformation of hot rolled magnesium alloy AZ31[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2004(1/2):207-213. |
| [7] | 刘子利,丁文江,袁广银,朱燕萍.镁铝基耐热铸造镁合金的进展[J].机械工程材料,2001(11):1-4,33. |
| [8] | Chrestian J W;Mahajan S .Deformation twinning[J].Progress in Materials Science,1995,39:1-157. |
| [9] | 钟家湘;郑秀华;刘颖.金属学教程[M].北京:北京理工大学出版社,1995 |
| [10] | 董文超,王朝晖,康永林,徐跃,刘津伟.T61热处理和过热度对AM60镁合金组织及力学性能的影响[J].汽车工艺与材料,2004(07):26-28. |
| [11] | Prado M T;Valle J A;Contreras J W .Microsoructural evolution during large strain hot rolling of an AM60 Mg alloy[J].Scripta Materialia,2004,50:661-665. |
| [12] | Mark Denis Nave;Matthew Robert Barnett .Microstructures and textures of pure magnesium deformed in plane-strain compression[J].Scripta materialia,2004(9):881-885. |
| [13] | 吕宜振 .Mg-Al-Zn合金组织、性能、变形和断裂行为研究[D].上海交通大学,2001. |
| [14] | Barnett M R;Keshavara Z;Beer A G et al.Influence of grain size on the compressive deformation of wrought Mg-3Al-1Zn[J].Acta Materialia,2004,52:5093-5103. |
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