采用维氏硬度测试、拉伸性能测试和透射电子显微分析技术,研究了断续时效处理对Al-Cu-Mg-Ag耐热铝合金组织与性能的影响.结果表明,较低的二次时效温度能够促进θ′相的析出,抑制Ω相的析出,降低合金强度,提高合金的伸长率；而较高的二次时效温度则会促进Ω相的析出,抑制θ′相的析出,细化Ω相的尺寸,并且能够改善强化相在晶界的分布,从而提高合金的强度和伸长率.合金适宜的断续时效制度为185℃/2h+150℃/6h.
参考文献
| [1] | SUKUMARAN K;RAVIKUMAR K K;PILLAI S G K et al.Studies on squeeze casting of Al 2124 alloy and 2124-10% SiCp metal matrix composite[J].Materials Science and Enginecring:A,2008,490(1-2):235-241. |
| [2] | Raju PN;Rao KS;Reddy GM;Kamaraj M;Rao KP .Microstructure and high temperature stability of age hardenable AA2219 aluminium alloy modified by Sc, Mg and Zr additions[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1-2):192-201. |
| [3] | Jianhua Wang;Danqing Yi;Xuping Su .Influence of deformation ageing treatment on microstructure and properties of aluminum alloy 2618[J].Materials Characterization,2008(7):965-968. |
| [4] | Kun Yu;Wenxian Li;Songrui Li .Mechanical properties and microstructure of aluminum alloy 2618 with Al_3(Sc, Zr) phases[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(1/2):88-93. |
| [5] | Chang CH;Lee SL;Lin JC;Yeh MS;Jeng RR .Effect of Ag content and heat treatment on the stress corrosion cracking of Al-4.6Cu-0.3Mg alloy[J].Materials Chemistry and Physics,2005(2/3):454-462. |
| [6] | D. H. Xiao;J. N. Wang;D. Y. Ding .Effect of Cu content on the mechanical properties of an Al-Cu-Mg-Ag alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2002(1/2):77-81. |
| [7] | 肖代红,宋旼,陈康华,黄伯云.热处理对含Ag耐热铝合金组织与性能影响[J].材料热处理学报,2008(01):75-79. |
| [8] | R. N. Lumley;I. J. Polmear .The effect of long term creep exposure on the microstructure and properties of an underaged Al–Cu–Mg–Ag alloy[J].Scripta materialia,2004(9):1227-1231. |
| [9] | LUMLEY R N;POLMEAR I J;MORTON A J .Heat treatment of age hardenable aluminum alloys[P].United States:US7025839B2,2006. |
| [10] | C. E. Macchi;A. Somoza;A. Dupasquier .Secondary precipitation in Al-Zn-Mg-(Ag) alloys[J].Acta materialia,2003(17):5151-5158. |
| [11] | Buha J;Lumley RN;Crosky AG .Secondary ageing in an aluminium alloy 7050[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):1-10. |
| [12] | 李海,郑子樵,王芝秀.7055铝合金二次时效特征研究-（Ⅰ）力学性能[J].稀有金属材料与工程,2005(07):1029-1032. |
| [13] | 周古为,郑子樵,李海.基于人工神经网络的7055铝合金二次时效性能预测[J].中国有色金属学报,2006(09):1583-1588. |
| [14] | 张坤,戴圣龙,黄敏,杨守杰,颜鸣皋.高纯Al-Cu-Mg-Ag合金的多级断续时效工艺研究[J].航空材料学报,2007(04):1-5. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%