通过组织观察(光学显微镜和扫描电镜)、力学性能检测、电导率测定,研究了单级固溶和双级固溶对7A55铝合金板材组织和力学性能的影响.结果表明:采用最佳单级固溶制度470℃/0.5h和120℃/24h时效处理,其力学性能σb,σ02和δ分别为635MPa,584MPa,和13.1%.与单级固溶处理制度相比,双级固溶处理在再结晶程度较小的情况下,能较大幅度的提高7A55铝合金板材的固溶度.采用双级固溶处理450℃/1.5h+485℃/40min,120℃/24h时效后的力学性能有较大提升,其σb,σ0.2和δ分别达648MPa,630MPa和11.2%,较单级固溶其σ0.2强度提高了7.8%.
参考文献
[1] | Deshpande N U;Gorkhale A M .Relationship between fracture toughness,fracture path,and microstructure of 7050 aluminum alloy:Part Ⅰ.Quantitative characterization[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1998,29(04):1191-1201. |
[2] | Morere B.;Ehrstrom J.C. .Microstructural Effects on Fracture Toughness in M7010 Plate[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2000(10):2503-2515. |
[3] | BRUCE MORERE;CLAIRE MAURICE;RAVI SHAHANI .The Influence of Al_3Zr Dispersoids on the Recrystallization of Hot-Deformed AA 7010 Alloys[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2001(3):625-632. |
[4] | Dong-Woo Suh;Sang-Yong Lee;Kyong-Hwan Lee;Su-Keun Lim;Kyu Hwan Oh .Microstructural evolution of Al-Zn-Mg-Cu-(Sc) alloy during hot extrusion and heat treatments[J].Journal of Materials Processing Technology,2004(0):1330-1336. |
[5] | ЕЛАГИНВВИ В .AxAPOB.O6pa6.Mer[Z].,1994-11. |
[6] | 李行旦 .[J].上海金属(有色分册),1992,13(04):13. |
[7] | J. D. Robson;P. B. Prangnell .Predicting recrystallized volume fraction in aluminium alloy 7050 hot rolled plate[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2002(6):607-614. |
[8] | J.D. Robson .Microstructural evolution in aluminium alloy 7050 during processing[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(1/2):112-121. |
[9] | 宁爱林,蒋寿生,彭北山.铝合金的力学性能及其电导率[J].轻金属,2005(06):34-36. |
[10] | Humphreys F J;Hatherly M.Recrystallization and related annealing phenomena[M].Oxford:Elsevier Science Ltd,1995:127-173. |
[11] | 李松瑞;周善初.金属热处理[M].长沙:中南大学出版社,2003:30-46. |
[12] | Zwickan E C;Freiberg U T .Possibilities for the calculation for the heat treatment diagrams for industrial AlZnMg(Cu) alloys[J].Aluminium,1999,75:90-96. |
[13] | 刘红卫,陈康华,刘允中.强化固溶对7075铝合金组织与性能的影响[J].金属热处理,2000(09):16-17. |
[14] | Ludtka G M;Laughlin D E .The influence of microstructure and strength on the fracture mode and toughness of 7xxx series aluminum alloys[J].METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,1982,13(03):411-414. |
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%