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Multi-solute solid solution behavior and its effect on the properties of magnesium alloys

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Journal of Magnesium and Alloys 2022年第7期10卷 1786-1820页

作者： Jun Wang Yuan Yuan Tao Chen Liang Wu Xianhuan Chen Bin Jiang Jingfeng Wang Fusheng Pan National Engineering Research Center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400000PR China

The low-density magnesium(Mg)alloys are attractive for the application in aerospace,transportation and other weight-saving-required *** mechanical properties and corrosion properties of Mg alloys are the key-property issues for the wide *** is surprising to find that the solid solution of alloying elements in theα-Mg phase can have multi-effects on the properties of Mg alloys,e.g.,solid solution strengthening,solid solution corrosion-resistance-enhancing,***,the alloy design theory of"solid solution strengthening and ductilizing"proposed by Pan and co-workers has attracted extensive *** is promising that by selected proper multi-alloying-elements(with optimal ratio)solid solutioned in theα-Mg phase,the comprehensive properties of Mg alloys can be synergistically *** this work,the solid solution behavior of Mg alloys and the followed solid solution property-enhancing effects were *** mechanisms proposed recently by researchers for these solid solution property-enhancing behaviors were presented,and the related calculations and predictions were also *** is shown the demonstrations of the fundamentals for the solid solution property-enhancing of Mg alloys,especially from the atomic inter-reaction aspects,still require elaborated characterization work and calculation ***,it could be expected that the multi-solute in Mg alloys can bring many possibilities,or,in another saying,"cocktail effects".With understanding the multi-solute interaction behavior and the corresponded solid solution property-enhancing effects,the good balanced high-performance Mg alloys can be developed.

关键词： Mg alloys Solid solution Strength Ductility corrosion-resistance

Microstructure and property modifications in surface layers of a Mg-4Sm-2Al-0.5Mn alloy induced by pulsed electron beam treatments

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Journal of Magnesium and Alloys 2021年第1期9卷 216-224页

作者： Yingrui Liu Kemin Zhang Jianxin Zou Ping Yan Xu Zhang Luxia Song School of Materials Engineering Shanghai University of Engineering ScienceShanghai 201620China National Engineering Research Center of Light Alloys Net Forming&School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China

In this work,surface modification of a Mg-4Sm-2Al-0.5Mn alloy with high current pulse electron beam(HCPEB)under different number of pulses were *** evolution in microstructure,composition and phase components and properties in the surface layer before and after HCPEB treatment were *** was found that the Al 11 Sm 3 and Al 2 Sm phases in the surface layer were gradually dissolved during HCPEB treatment,leading to the formation of a chemical homogeneous melted ***,deformation bands were formed in the treated layer due to the thermal stress generated during *** 15 pulses treatment,the surface hardness increases to the maximum value of about 62.2 HV,about 61.2%higher than that of the untreated *** results show that the 15 pulses treated sample presents the best corrosion resistance in the 3.5wt%NaCl water solution by showing the highest corrosion potential(E_(corr))of-1.339V SEC and the lowest corrosion current density(I_(corr))of 1.48×10^(-6)A·cm^(-2).The results prove that the surface properties of the Mg-4Sm-2Al-0.5Mn alloy can be significantly improved by the HCPEB treatments under proper conditions.

关键词： High current pulsed electron beam(HCPEB) Surface modification Mg rare earth alloy Microstructures corrosion-resistance

Electroless nickel fabrication on surface modified magnesium substrates

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Defence Technology（防务技术） 2019年第4期15卷 636-644页

作者： Ayushi Thakur Swaroop Gharde Balasubramanian Kandasubramanian Department of Metallurgical and Materials Engineering National Institute of Technology Hazratbal Srinagar Jammu & Kashmir 190006 India Department of Metallurgical & Materials Engineering DIAT (DU) Ministry of Defence Girinagar Pune 411025 Maharashtra India

In recent years,magnesium(Mg)has evolved as a salient material,in affiliation with electroless nickel(Ni)coating,which have found applications in automobiles,aerospace and confederate fields attributing to its excellent inherent weight sensitive ***,being acknowledged for its remarkable auxiliary properties like flexible machining,appreciable weight sensitivity and ability to be patently diecast into mesh constructs,magnesium is prejudiced by aeronautical standards predominantly for its inferior corrosion resistance *** this sense,electroless nickel plating on magnesium and its alloys has been suggested to extricate it from corrosion problem and make it more competitive in industrial and defence *** fixation of metal ions onto respective substrates accrues and alters their mechanical,electrochemical and tribological properties,destitute of any electric current *** proficiently identified technique is prosecuted with the assistance of a series of sequenced operations involving a prior pretreatment,which corresponds to the chemical cleaning of the substrate surface;electroless coating;and a later activation process which is a mild etching of the electroless coated *** susceptibility of magnesium to this methodology has advanced and propagated its exercise and applicability in aircraft,satellites and allied aeronautical ***,researchers have proposed various eco-friendly and modified duplex and composite coatings which have transmuted properties of these appendages by tailoring alloy compositions and reagents *** review article systematically colligates various considerations and evaluations on electroless nickel applications of magnesium and its alloys and explicates how it anchors its practice in the respective ***,a comprehensive analysis is devised based on the pre-existing treatment methods for accomplishing the same.

关键词： Electroless nickel plating Magnesium Magnesium alloys corrosion-resistance Micro arc oxidation(MAO)