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Surface composite nanostructures of AZ91 magnesium alloy induced by high current pulsed electron beam treatmentL
M. C. Li; S. Z. Hao; H. Wen; R. F. Huang
2014
Source PublicationApplied Surface Science
ISSN0169-4332
Volume303Pages:350-353
AbstractHigh current pulsed electron beam (HCPEB) treatment was conducted on an AZ91 cast magnesium alloy with accelerating voltage 27 kV, energy density 3 J/cm(2) and pulse duration 2.5 mu s. The surface microstructure was characterized by optical microscope (OM), X-ray diffraction (XRD), scanning electron microscope(SEM) equipped with energy dispersive spectrometer (EDS), and transmission electron microscope (TEM). The surface corrosion property was tested with electrochemical method in 3.5 wt.% NaCl solution. It is found that after 1 pulse of HCPEB treatment, the initial eutectic alpha phase and Mg17Al12 particles started to dissolve in the surface modified layer of depth similar to 15 mu m. When using 15 HCPEB pulses, the Al content in surface layer increased noticeably, and the phase structure was modified as composite nanostructures consisted of nano-grained Mg3.1Al0.9 domains surrounded by network of Mg17Al12 phase. The HCPEB treated samples showed an improved corrosion resistance with cathodic current density decreased by two orders of magnitude as compared to the initial AZ91 alloy. (C) 2014 Elsevier B. V. All rights reserved.
description.department[li, m. c. ; hao, s. z.] dalian univ technol, sch mat sci & engn, dalian 116024, peoples r china. [li, m. c. ; hao, s. z.] dalian univ technol, key lab mat modificat laser ion & electron beams, dalian 116024, peoples r china. [hao, s. z.] sch phys & optoelect engn, dalian 116024, peoples r china. [wen, h.] huazhong univ sci & technol, wuhan natl lab optoelect, wuhan 430074, peoples r china. [huang, r. f.] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; hao, sz (reprint author), dalian univ technol, key lab mat modificat laser ion & electron beams, dalian 116024, peoples r china. ; ebeam@dlut.edu.cn
KeywordHigh Current Pulsed Electron Beam Surface Treatment Magnesium Alloy Nanostructure Corrosion Corrosion Behavior Microstructure Resistance Wear
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/72868
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
M. C. Li,S. Z. Hao,H. Wen,et al. Surface composite nanostructures of AZ91 magnesium alloy induced by high current pulsed electron beam treatmentL[J]. Applied Surface Science,2014,303:350-353.
APA M. C. Li,S. Z. Hao,H. Wen,&R. F. Huang.(2014).Surface composite nanostructures of AZ91 magnesium alloy induced by high current pulsed electron beam treatmentL.Applied Surface Science,303,350-353.
MLA M. C. Li,et al."Surface composite nanostructures of AZ91 magnesium alloy induced by high current pulsed electron beam treatmentL".Applied Surface Science 303(2014):350-353.
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