采用显微硬度测试、拉伸力学性能测试、扫描电镜及透射电镜观察等分析手段,研究了预变形对Al-Cu-Mn-Mg-Ag合金的组织与力学性能的影响.结果表明:时效前的冷轧变形加速了Al-Cu-Mn-Mg-Ag合金的时效进程,提高了时效的峰值硬度,促进Ω相的析出,增加Ω相的数量.随着变形量的增加,合金时效过程中双阶段时效硬化的现象减弱,预变形小于10%时,时效过程中出现明显的双阶段时效硬化特征,预变形大于10%时,时效过程仅出现明显的单阶段时效硬化特征;随着预变形量的增加,合金的抗拉强度和屈服强度逐渐增加,延伸率逐渐降低.综合考虑合金的强度和塑性,Al-Cu-Mn-Mg-Ag合金的预变形量应为10%～20%.
参考文献
| [1] | SINGH S;GOEL D B .Influence of thermomechanical aging on tensile properties of 2014 aluminium alloy[J].Journal of Materials Science,1990,25(09):3894-3900. |
| [2] | ISMAIL Z H .Microstructure and mechanical properties developed by thermomechanicai treatment in an AIMgSi alloy[J].Scripta Metallurgica et Materialia,1995,32(03):457-462. |
| [3] | CHATURVEDI M C;CHUNG D W;DOUCETTE R A .Effect of thermomechanical treatment on structure and properties of 2036 aluminum alloy[J].Metal Science Journal,1979,13(01):34-38. |
| [4] | 王建华 .2618耐热铝合金的组织与力学性能的研究[D].中南大学,2003. |
| [5] | James J. Fisher Jr.;Lawrence S. Kramer;Joseph R. Pickens .ALUMINUM ALLOY 2519 IN MILITARY VEHICLES[J].Advanced Materials & Processes,2002(9):43-46. |
| [6] | B. Carter Hamilton;Ashok Saxena .Transient crack growth behavior in aluminum alloys C415-T8 and 2519-T87[J].Engineering Fracture Mechanics,1999(1):1-22. |
| [7] | L.S. Kramer;T.P. Blair;S.D. Blough .Stress-Corrosion Cracking Susceptibility of Various Product Forms of Aluminum Alloy 2519[J].Journal of Materials Engineering and Performance,2002(6):645-650. |
| [8] | HUTCHINSON C R;FAN X;PENNYCOOK S J et al.On the origin of the high coarsening resistance of Ω plates in Al-Cu-Mg-Ag alloys[J].Acta Materialia,2001,49:2827-2841. |
| [9] | KERRY S;SCOTT V D .Structure and orientation relationship of precipitates formed in Al-Cu-Mg-Ag alloys[J].Metal Science Journal,1984,18(06):289-294. |
| [10] | B.-P. Huang;Z.-Q.Zheng .Independent and combined roles of trace Mg and Ag additions in properties precipitation process and precipitation kinetics of Al-Cu-Li- (Mg)-(Ag)-Zr-Ti alloys[J].Acta materialia,1998(12):4381-4393. |
| [11] | UNLU N;GABLE B M;SHIFLET G J et al.The effect of cold work on the precipitation of θ' and Ω in a ternary Al-Cu-Mg Alloy[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2003,34(12):2757-2769. |
| [12] | 陈险峰,彭大暑,张辉,林启权,林高用.热处理制度对2519铝合金板材力学性能和应力腐蚀敏感性的影响[J].中国有色金属学报,2003(04):934-938. |
| [13] | 李慧中,张新明,陈明安,周卓平,龚敏如.预变形对2519铝合金组织与力学性能的影响[J].中国有色金属学报,2004(12):1990-1994. |
| [14] | Woo KD.;Kim SW. .The mechanical properties and precipitation behavior of an Al-Cu-Li-(In,Be) alloy[J].Journal of Materials Science,2002(2):411-416. |
| [15] | LI Hui-zhong,ZHANG Xin-ming,CHEN Ming-an,ZHOU Zhuo-ping.Effects of Ag on microstructure and mechanical properties of 2519 aluminum alloy[J].中南工业大学学报（英文版）,2006(02):130-134. |
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%