Effect of high current pulsed electron beam treatment on microstructure and microhardness of hypereutectic Al-15Si alloy
Effect of High current pulsed electron beam (HCPEB) treatment on microstructure and microhardness of hypereutectic Al-15Si alloy was studied in this paper. Microstructure evolution with different treating parameter was studied by SEM and EPMA. Phase transformation after HCPEB treatment was studied by XRD. For the 2.5J/cm2 of energy density used in the present work, the treatment induced high-rate heating and cooling of Al-15 Si alloy surface. As a result, supersaturated solid solution of Al-Si is formed in alloy surface. Comparing with initial sample, lattice parameters of Al decrease and lattice distortion increases after HCPHB treatment. Chemical compositions of Al and Si elements tend to the gradual distribution by EPMA analysis, forming unlimited solid solution of Al and Si elements. Microhardness of alloy surface increases with increasing Si contents in solid solution. The HCPHB technique is thus demonstrated to be an effective technique for treating coarse primary Si phase of hypereutectic Al-Si alloys and has good application future.
High current pulsed electron beam (HCPEB) Hypereutectic Al-15Si alloy Supersaturated solid solution Microhardness
GAO Bo HAO Yi TU Gan-feng SHI Wei-xi LI Shi-wei HAO Sheng-zhi DANG Chuang
School of materials and metallurgy, Northeastern University, Shenyang, China, 110004 Key Laboratory of the Ministry of Education of Materials Modification by Laser, Ion and Electron Bea
国际会议
沈阳
英文
68-74
2009-08-24（万方平台首次上网日期，不代表论文的发表时间）