通过光学显微镜(OM)、扫描电镜(SEM)和透射电镜(TEM)研究了紫铜板钻削加工后孔边组织结构特征.结果表明钻削加工后孔边变形区可分为3个区域,距孔边约240.150μm区域,晶粒沿剪切方向偏转、拉长形成流线组织;距孔边约150～100μm区域,加工流线组织逐渐模糊、碎化,向细晶过渡;距孔边＜100μm区域,变形组织晶粒非常细小,发生了动态回复和动态再结晶.经过切削加工后,变形区域的硬度值较原始组织有较大的提高.
参考文献
| [1] | H. Ni;A.T. Alpas .Sub-micrometer structures generated during dry machining of copper[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):338-349. |
| [2] | Zhang H.;Alpas AT. .Quantitative evaluation of plastic strain gradients generated during orthogonal cutting of an aluminum alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):249-254. |
| [3] | Li JG;Umemoto M;Todaka Y;Tsuchiya K .A microstructural investigation of the surface of a drilled hole in carbon steels[J].Acta materialia,2007(4):1397-1406. |
| [4] | J.G. Li;M. Umemoto;Y. Todaka .Role of strain gradient on the formation of nanocrystalline structure produced by severe plastic deformation[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2007(0):290-293. |
| [5] | J.G. Li;M. Umemoto;Y. Todaka;K. Tsuchiya .Nanocrystalline structure formation in carbon steel introduced by high speed drilling[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):383-388. |
| [6] | 陈明安,李慧中,李学谦,刘楚明,刘文丽.紫铜棒材轴向加压精密塑性剪切变形区的金相组织和断面特征[J].中国有色金属学报,2005(04):513-518. |
| [7] | 刘新芹,王富耻,王琳,路永胜.钢中绝热剪切带的动态损伤演化[J].兵器材料科学与工程,2004(03):17-21. |
| [8] | 谭成文,王富耻,李树奎,苏铁建.绝热剪切带内微孔洞演化规律研究[J].兵工学报,2004(02):197-199. |
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%