研究了淬火速率对峰值时效状态下的砂铸Al-7Si-0.4Mg合金拉伸性能及疲劳裂纹扩展行为的影响. 结果表明, 随着淬火速率的提高,合金的抗拉强度、屈服强度以及α(Al)相的显微硬度均有提高, 抗拉强度和屈服强度与淬火速率的对数值近似成线性关系. 淬水速率对合金的延伸率影响较小, 但对合金的室温疲劳裂纹扩展速率有明显影响, 较高的淬火速率可以明显提高合金的疲劳裂纹扩展阻力.
参考文献
| [1] | Evancho J W;Staley J T .Kinetics of precipitation in aluminum alloys during continuous cooling[J].Metallurgical and Materials Transactions,1974,5:43-47. |
| [2] | Thompson D S;Subramamya B S;Levy S A .Quench rate effects in Al-Zn-Mg-Cu alloys[J].Metallurgical and Materials Transactions,1971,2:1149-1160. |
| [3] | Tsukuda M;Koike S;Harada M .An investigation of improperly quenched aluminum plate[J].Japanese Journal of Institute of Light Metals(Japan),1978(28):8-14. |
| [4] | Zhang D L;ZHENG L .The quench sensitivity of cast Al-7 Wt Pct-0.4 Wt Pct Mg alloy[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1996,27:3983-3991. |
| [5] | 王祝堂;张振录.Trans. 铝合金的组织与性能[M].北京:冶金工业出版社,1988:313-320. |
| [6] | Shivkumar S;Ricci S;Keller Jr C et al.Effect of solution treatment parameters on tensile properties of cast aluminum alloys[J].Journal of Heat Treating,1990,8:63-70. |
| [7] | Sawtell R R;Alcoa C P .Effects of quenching path in aluminium alloy 7075[J].Aluminium,1984,60:198-202. |
| [8] | LEE F T;Major J F;Samuel F H .Effect of silicon particles on the fatigue crack growth characteristics of Al-12 Wt Pct Si-0.35 Wt Pct Mg-(0 to 0.02) Wt Pct Sr casting alloys[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1995,26:1553-1570. |
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