Chemical and mechanical properties of stainless,environment-friendly,and nonflammable Mg alloys(SEN alloys):A review

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外文摘要：This review article provides overall understanding of stainless,environment-friendly,and nonflammable Mg alloys(SEN alloys)recently de-veloped at the Korea Institute of Materials Science.SEN alloys are produced by adding small amounts of Ca and Y(each＜1％in mass fraction)into commercial Mg-Al based alloys,resulting in exceptional ignition and corrosion resistances and impressive mechanical properties.Their main advantages of SEN alloys are as follows.(1)A dense multi-oxide layer of SEN alloys comprising MgO,CaO,and Y2O3 impedes the out-ward dispersion of Mg vapor and the inward penetration of O2 during oxidation,thereby enhancing the oxidation and ignition resistances.(2)The presence of Ca-and Y-based second-phase particles in SEN alloys can enhance their corrosion resistance because Ca-containing particles prevent the spread of corrosion,and the replacement of Al-containing particles with less noble ones containing Y(e.g.,Al-Mn-Y or Al-Y parti-cles)retards corrosion.(3)The addition of minor amounts of Ca and Y renders excellent mechanical properties due to improved strengthening effects.These enhanced properties are attributed to more pronounced dynamic recrystallization and grain refining behaviors caused by the sec-ond-phase particles during extrusion.(4)Despite the presence of various types of second-phase particles,the fatigue properties of SEN9 alloys are similar to those of commercial AZ91 alloys.(5)Simultaneous introduction of Ca and Y suppresses the formation of Mg17Al12 discontinuous precipitates during aging,leading to the enhanced elongation of aged SEN alloys.(6)Adding mischmetal into the SEN9 alloy leads to a six-fold enhancement in extrudability.Consequently,the studies conducted on SEN alloys demonstrate their excellent ignition and corrosion resistances and mechanical properties,which broaden the industrial applications of Mg alloys by addressing their inherent weaknesses.

外文关键词：

SEN magnesium alloyCorrosion resistanceIgnition resistanceMechanical propertiesExtrudability

作者：

Jong Un Lee、Hyun Ji Kim、Sang-Cheol Jin、Ye Jin Kim、Young Min Kim、Bong Sun You、Jun Ho Bae、Sung Hyuk Park

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作者单位：

Advanced Metals Division,Korea Institute of Materials Science,Changwon 51508,Republic of Korea

Department of Materials Science and Metallurgical Engineering,Kyungpook National University,Daegu 41566,Republic of Korea

Missile Research Institute,Agency for Defense Development,Daejeon 34060,Republic of Korea

基金：

Materials and Components Technology Development ProgramMaterials and Components Technology Development ProgramMaterials and Components Technology Development ProgramNational Research Council of Science and Technology(NST)grant the Korea government(MSIT)

项目编号：

20024843funded by the Ministry of TradeIndustry & EnergyMOTIESouth KoreaCRC23011-000

出版年：

2024

DOI：

10.1016/j.jma.2024.03.011

镁合金学报(英文)

ISSN：2213-9567

年,卷(期)：2024.12(3)

参考文献量179