利用HRTEM和TEM研究了Al-Zn-Mg合金高能喷丸表面纳米化过程中微观结构的演变.结果表明,经表面高能喷丸处理,样品表面形成了厚度约20μm的纳米晶层,随温度的增加,平均晶粒尺寸由约20nm逐渐增加到约100nm;随着塑性变形量的增加,η′相在纳米晶区内几乎完全返溶,形成晶粒尺寸小于100nm的单相α过饱和固溶体.其原因可能是由于α固溶体的晶粒尺寸超细化而导致固溶度增加.
参考文献
| [1] | Lu K;Lu J .Surface nanocrystallization(SNC)of metallic materials presentation of the concept behind a new approach[J].Journal of Materials Science and Technology,1999,15(03):193-197. |
| [2] | N. R. Tao;Z. B. Wang;W. P. Tong;M. L. Sui;J. Lu;K. Lu .An investigation of surface nanocrystallization mechanism in Fe induced by surface mechanical attrition treatment[J].Acta materialia,2002(18):4603-4616. |
| [3] | G. Liu;J. Lu;K. Lu .Surface nanocrystallization of 316L stainless steel induced by ultrasonic shot peening[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(1):91-95. |
| [4] | G. Liu;S.C. Wang;X.F. Lou .LOW CARBON STEEL WITH NANOSTRUCTURED SURFACE LAYER INDUCED BY HIGH-ENERGY SHOT PEENING[J].Scripta materialia,2001(8-9):1791-1795. |
| [5] | X.Wu;N. Tao;Y. Hong .Microstructure and evolution of mechanically-induced ultrafine grain in surface layer of AL-alloy subjected to USSP[J].Acta materialia,2002(8):2075-2084. |
| [6] | Tong W P;Tao N R;Wang Z B et al.Nitriding iron at lower temperatures[J].Science,2003,299:686-688. |
| [7] | 杨军军 .稀土元素Er在Al-Mg和Al-Zn-Mg合金中的作用机理研究[D].北京工业大学,2004. |
| [8] | 胡兰青,李茂林,王科,刘刚,卫英慧,许并社.铝合金表面纳米化处理及显微结构特征[J].中国有色金属学报,2004(12):2016-2020. |
| [9] | 徐祖耀.金属材料热力学[M].北京:科学出版社,1981:241. |
| [10] | 潘金生;仝健民;田民波.材料科学基础[M].北京:清华大学出版社,1998:470. |
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%