以铝合金时效强化动力学为理论基础,研究了时效处理工艺参数对7A04铝合金组织和性能的影响.得到了优化的分级时效工艺.在此基础上,建立了时效强化相类型、尺寸、体积分数与铝合金屈服强度关系的计算模型;给出了固溶强化、弥散强化对铝合金屈服强度影响的统一表达式;并利用该模型对7A04高强铝合金单级时效和二级时效处理后的屈服强度进行了预测.计算结果表明,在达到最大时效强度前,屈服强度计算结果与实验测量结果基本一致;此后,由于强化相体积分数计算偏差增加,屈服强度计算的准确度有所下降.
参考文献
| [1] | 尚勇,张立武.高强铝合金的热处理技术[J].上海有色金属,2005(02):97-102. |
| [2] | 曾渝,尹志民,潘青林,郑子樵,刘志义.超高强铝合金的研究现状及发展趋势[J].中南工业大学学报(自然科学版),2002(06):592-596. |
| [3] | 李海,郑子樵,王芝秀.过时效-重固溶-再时效处理对 7055铝合金组织与性能的影响[J].材料热处理学报,2004(03):57-61. |
| [4] | Park J K;Ardell A J .Microstructure of the commercial 7075 A1 alloy in the T651 and T7 tempers[J].Metallurgical and Materials Transactions A:Physica,1983,14:1957-1965. |
| [5] | Srivatsan T S .Microstructure,tensile properties and fracture behavior of aluminum alloy 7150[J].Journal of Materials Science,1992,27:4772-4781. |
| [6] | Berg L K;Gjonnes J;Hansen V et al.GP-zone in Al-Zn-Mg alloys and their role in aritificial aging[J].Acta Materialia,2001,49:3443-3451. |
| [7] | 陈昌麒,刘培英,周铁涛,张永刚.铝合金热处理计算机模拟的一些进展[J].材料热处理学报,2001(01):55-59. |
| [8] | U.Schmidt;B.Schmidt .Modelling of the transition kinetics in Al-alloys[J].Materials Science Forum,2000(0):889-900. |
| [9] | Poole W.J.;Seter J.A. .A Model for Predicting the Effect of Deformation after Solution Treatment on the Subsequent Artificial Aging Behavior of AA7030 and AA7108 Alloys[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2000(9):2327-2337. |
| [10] | Kashyap K.T.;Ramachandra C. .A model for two-step ageing[J].Bulletin of Materials Science,1998(5):405-411. |
| [11] | Andrade-Campos, A;da Silva, FN;Teixeira-Dias, F .Modelling and numerical analysis of heat treatments on aluminium parts[J].International Journal for Numerical Methods in Engineering,2007(5):582-609. |
| [12] | R. Clark Jr;B. Coughran;I. Traina .On the correlation of mechanical and physical properties of 7075-T6 Al alloy[J].Engineering failure analysis,2005(4):520-526. |
| [13] | J Zhu A W;Starke E A .Strengthnening effect of unshearable particles of finite size:a computer experimental study[J].Aeta Mater,1999,47(11):3263-3269. |
| [14] | B. Clausen .Self-consistent modelling of the plastic deformation of f.c.c. polycrystals and its implications for diffraction measurements of internal stresses[J].Acta materialia,1998(9):3087-3098. |
| [15] | Jena A K;Chaturvedi M C.Phase Transformation in Materials[M].New Jersey:Prentice-Hall Press,1992 |
| [16] | R. C. Dorward .Precipitate coarsening during overaging of Al-Zn-Mg-Cu alloy[J].Materials Science and Technology: MST: A publication of the Institute of Metals,1999(10):1133-1138. |
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