Improved corrosion resistance of Mg alloy AZ31B induced by selective evaporation of Mg using large pulsed electron beam irradiation
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  • 英文篇名：Improved corrosion resistance of Mg alloy AZ31B induced by selective evaporation of Mg using large pulsed electron beam irradiation
  • 作者：Woo ; Jin ; Lee ; Jisoo ; Kim ; Hyung ; Wook ; Park
  • 英文作者：Woo Jin Lee;Jisoo Kim;Hyung Wook Park;Department of Mechanical, Aerospace, and Nuclear Engineering, Ulsan National Institute of Science and Technology;
  • 英文关键词：Magnesium alloys;;Electron beam treatment;;Corrosion resistance;;Microstructure Rapid re-solidification;;Wear resistance
  • 中文刊名：CLKJ
  • 英文刊名：材料科学技术(英文版)
  • 机构：Department of Mechanical, Aerospace, and Nuclear Engineering, Ulsan National Institute of Science and Technology;
  • 出版日期：2019-05-15
  • 出版单位：Journal of Materials Science & Technology
  • 年：2019
  • 期：v.35
  • 基金：supported financially by the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (Nos. 2018R1A2B3007806 and 2017R1A5A1015311);; the Development of High Power Density Electron Beam Micro-drilling Machine and Process for High Aspect-ratio Micro-hole Parts funded by Ministry of Trade, Industry and Energy (No. 10063367)
  • 语种：英文;
  • 页：CLKJ201905023
  • 页数：11
  • CN：05
  • ISSN：21-1315/TG
  • 分类号：191-201
摘要
Large pulsed electron beam(LPEB) irradiation was employed as a surface treatment of magnesium(Mg)alloy AZ31B to enhance its corrosion and wear resistance. Selective evaporation of Mg induced by LPEB irradiation at an energy density of 5 J/cm~2 for 40 cycles has led to the formation of an Al-enriched resolidified layer with nano-grained structure consisting of Mg_(3.1) Al_(0.9) metastable phase. The formation of such a re-solidified layer after LPEB irradiation has enabled a decrease in corrosion rate of Mg alloy AZ31B in 3.5% NaCl solution. Different equivalent electrical circuit models were proposed to account for the corrosion behavior of untreated Mg alloy AZ31B and those subjected to LPEB irradiation. A decrease in wear depth when compared to that of the untreated alloy suggests an increase in wear resistance of LPEB-irradiated Mg alloy AZ31B. Adhesive wear is the predominant mechanism of untreated Mg alloy AZ31B while abrasive wear mechanism dominates for LPEB-irradiated Mg alloy AZ31B.
        Large pulsed electron beam(LPEB) irradiation was employed as a surface treatment of magnesium(Mg)alloy AZ31B to enhance its corrosion and wear resistance. Selective evaporation of Mg induced by LPEB irradiation at an energy density of 5 J/cm~2 for 40 cycles has led to the formation of an Al-enriched resolidified layer with nano-grained structure consisting of Mg_(3.1) Al_(0.9) metastable phase. The formation of such a re-solidified layer after LPEB irradiation has enabled a decrease in corrosion rate of Mg alloy AZ31B in 3.5% NaCl solution. Different equivalent electrical circuit models were proposed to account for the corrosion behavior of untreated Mg alloy AZ31B and those subjected to LPEB irradiation. A decrease in wear depth when compared to that of the untreated alloy suggests an increase in wear resistance of LPEB-irradiated Mg alloy AZ31B. Adhesive wear is the predominant mechanism of untreated Mg alloy AZ31B while abrasive wear mechanism dominates for LPEB-irradiated Mg alloy AZ31B.
引文
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