Liquid Penetration Phenomenon During Semi-solid Rolling from Gas Atomized Powders

摘要：

　　Under an H2 atmosphere, the green strips have been prepared from Al-5.8Zn 1.63 Mg-2.22Cu-0.12Zr (Wt.%) powders by the semi-solid rolling process.The effect of heating the powder at 610 ℃ (i.e.fs is 53 %) for different holding times on the microstructure evolution, espe cially the liquid penetration phenomenon of strips was investigate.Results shown that high degree of liquid penetration can accelerate the disappearance of primary particle boundary in the plane of contact and the change of powder primary boundaries.With increasing holding time from 10min to 30min at 610 ℃, the amount of η (MgZn2) phase decreased and more particles Al2Cu precipitated at grain bounda ries.The optimum holding times for Al-5.8Zn-1.63Mg-2.22Cu-0.12Zr (wt-%) powders is sug gested between 20 min to 30 min during semi-solid rolling at 610 ℃.The present experimental analysis suggests that semi-solid powder rolling can be opti mized to manufacture strips with high mechanical properties.

关键词： metal powder semi-solid rolling liquid penetration aluminum ahoy powder

作者: Fengxian Li Jianhong Yi Shang Li Shaoyu Li Rui Bao

作者单位: Kunming University of Science and Technology,Kunming 650033,China

会议类型: 国际会议

会议名称: The 12th China-Russia Symposium on Advanced Materials and Technologies(第十二届中俄双边新材料新工艺国际会议)

会议地点: 昆明

会议语种:英文

页码: 533-537

在线出版日期: 2013-11-19（万方平台首次上网日期，不代表论文的发表时间）