Influence of High Current Pulsed Electron Beam (HCPEB) Treatment on Wear Resistance of Hypereutectic Al-17.5Si and Al-20Si Alloys

Y. Hao; Bo Gao; Gan Feng Tu; Z. Wang; Sheng Zhi Hao

doi:10.4028/www.scientific.net/MSF.675-677.693

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Influence of High Current Pulsed Electron Beam (HCPEB) Treatment on Wear Resistance of Hypereutectic Al-17.5Si and Al-20Si Alloys
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Influence of High Current Pulsed Electron Beam (HCPEB) Treatment on Wear Resistance of Hypereutectic Al-17.5Si and Al-20Si Alloys

Abstract:

The paper reports an analysis of the effect of high current pulsed electron beam(HCPEB) on microstructure transformations and wear resistance of hypereutectic Al-Si alloys. HCPEB treatment with 2.5 J /cm2 energy density leads to the formation of “halo” centered on primary Si, composition homogeneity, the formation of supersaturated solid solution of Al and grain refinement of top melted surface layer. The wear resistance of 15 pulse-treated Al-17.5Si and Al-20Si alloys is drastically improved by a factor of 6.5 and 2, respectively. The increase of hardness in modified surface layer has a positive effect on wear of hypereutectic Al-Si alloys.

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Materials Science Forum (Volumes 675-677)

Pages:

693-696

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.675-677.693

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Online since:

February 2011

Authors:

Y. Hao, Bo Gao, Gan Feng Tu, Z. Wang, Sheng Zhi Hao

Keywords:

High Current Pulsed Electron Beam (HCPEB), Hypereutectic Al-Si Alloy, Microstructure, Wear Resistance

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