为提高铝合金材料力学性能,采用超音速微粒轰击(SFPB)技术对2A14铝合金进行表面纳米化处理,利用XRD、SEM和TEM等研究2A14铝合金表层第二相颗粒的弥散分布和形貌变化机理.结果表明:材料表面经强烈塑性变形形成约30 μm厚的纳米层和约120 μm厚的过渡层,表面纳米层晶粒尺寸为50～100 nm,表面显微硬度提高了1倍多,纳米层和过渡层中第二相颗粒得到细化,总体弥散分布比基体更加均匀,距表面距离越近,细化效果和总体弥散分布越好;在过渡层里部分第二相颗粒被亚晶界切分,在纳米层中第二相颗粒均被纳米晶包裹,第二相颗粒的边界与纳米晶晶界部分重合.第二相颗粒被纳米晶包裹影响纳米层晶界迁移机制,对材料表面性能的改善有积极意义.
参考文献
| [1] | 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,200218(18):4603-4616. |
| [2] | 马世宁;王翔;王晓明.7A52铝合金表面纳米晶层的电化学腐蚀性能[J].中国表面工程,2011(5):22-25. |
| [3] | 葛利玲;袁战伟;井晓天;卢正欣.纯钛（TA2）表面纳米化及其热稳定性研究[J].稀有金属材料与工程,2011(7):1239-1242. |
| [4] | H. W. Zhang;Z. K. Hei;G. Liu;J. Lu;K. Lu.Formation of nanostructured surface layer on AISI 304 stainless steel by means of surface mechanical attrition treatment[J].Acta materialia,20037(7):1871-1881. |
| [5] | Wu X;Tao N;Hong Y;Liu G;Xu B;Lu J;Lu K.Strain-induced grain refinement of cobalt during surface mechanical attrition treatment[J].Acta materialia,20053(3):681-691. |
| [6] | Amar K. De;David C. Murdock;Martin C. Mataya.Quantitative measurement of deformation-induced martensite in 304 stainless steel by X-ray diffraction[J].Scripta materialia,200412(12):1445-1449. |
| [7] | 刘德林;张兵;陶春虎;何玉怀;于洋.LD10铝合金锻件拉伸性能分析[J].金属热处理,2011(8):127-130. |
| [8] | G. Liu;S.C. Wang;X.F. Lou.LOW CARBON STEEL WITH NANOSTRUCTURED SURFACE LAYER INDUCED BY HIGH-ENERGY SHOT PEENING[J].Scripta materialia,20018-9(8-9):1791-1795. |
| [9] | YE Hui-qiong;FAN Xin-min.Surface nanocrystallization of 7A04 aluminium alloy induced by circulation rolling plastic deformation[J].中国有色金属学会会刊（英文版）,2006(z1):656-660. |
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%