研究复合添加微量Cr、Yb、Zr对Al-Zn-Mg-Cu合金的显微组织和断裂特征的影响,分析其对合金韧化的作用机制.结果表明:在Al-Zn-Mg-Cu合金中复合添加Cr、Yb、Zr形成了含Cr、Yb、Zr的球形弥散相,这些均匀分布于基体上的弥散相能强烈钉扎位错和亚晶界,使基体保持形变回复组织,保持小角度晶界,抑制基体再结晶;T6态断裂机制主要为韧窝型穿晶断裂,与仅添加Zr相比,沿晶断裂抗力显著提高;晶界的无沉淀区(PFZs)较宽,且析出相在晶界呈明显不连续分布.
参考文献
| [1] | Gerard M L;David E et al.[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1982,13A:411. |
| [2] | 刘文辉,张新明,李惠杰,刘胜胆,黄振宝.固溶处理对7A55铝合金断裂韧性的影响[J].中南大学学报（自然科学版）,2007(01):41-45. |
| [3] | Ryum N .[J].ACTA METALLURGICA,1969,17(03):269. |
| [4] | Yoshida H;Baba Y .[J].Transactions of the Japan Institute of Metals,1982,23(10):620. |
| [5] | Mukhopadhyay A K;Yang Q B .[J].Acta Metallurgica Et Materialia,1994,43(09):3083. |
| [6] | Tanaka H;Esaki H;Yamada K et al.[J].Sumitomo Light Metal Reports,2004,45(01):41. |
| [7] | Tanaka H;Esaki H;Yamada K et al.[J].J Japan Institute Light Metal,2002,52(11):553. |
| [8] | Hornbogen E;Starke E A Jr .[J].ACTA METALLURGICA ET MATERIALIA,1993,41(01):1. |
| [9] | Dorward R C;Beerntsen D J .[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1995,26A(09):2481. |
| [10] | Chen C Q;Knott J F .[J].Metal Science Journal,1981,15(08):357. |
| [11] | Robson J D;Prangnell P B .[J].Materials Science and Technology,2002,18(06):607. |
| [12] | Wu Yilei;Froes F H;Li Chenggong et al.[J].Metallurgical and Materials Transactions,1999,30A:1017. |
| [13] | 戴晓元,夏长清,孙振起,华熳煜,吴茵.Al-9.0Zn-2.5Mg-1.2Cu-0.12Sc-0.15Zr合金的组织和性能[J].中国有色金属学报,2007(03):396-401. |
| [14] | HE Yong-dong,ZHANG Xin-ming,YOU Jiang-hai.Effect of minor Sc and Zr on microstructure and mechanical properties of Al-Zn-Mg-Cu alloy[J].中国有色金属学会会刊（英文版）,2006(05):1228-1235. |
| [15] | Chen K H;Fang H C;Zhang Z et al.[J].Materials Science Forum,2007,546-549:1021. |
| [16] | FANG Hua-chan,CHEN Kang-hua,ZHANG Zhuo,ZHU Chang-jun.Effect of Yb additions on microstructures and properties of 7A60 aluminum alloy[J].中国有色金属学会会刊（英文版）,2008(01):28-32. |
| [17] | Chen Kanghua;Qi Xiongwei;Song Min .[J].Journal of Nonferrous Metals,2006,16(10):1678. |
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%