简介：分析了铸态和挤压态ZK60-xGd（x=0-4）合金的组织和相组成，测试了其拉伸力学性能。结果表明，随着Gd含量的增加，铸态组织逐渐细化，Mg-Zn-Gd新相逐渐增多，而MgZn2相逐渐减少直至消失，第二相趋于连续网状分布于晶界处；当Gd含量不超过2.98%时，铸态室温拉伸力学性能稍降低。经挤压比λ=40和挤压温度T=593K的挤压后，组织显著细化，平均晶粒尺寸逐渐减至ZK60-2.98Gd合金的2μm，破碎的第二相沿着挤压方向呈带状分布；挤压态的拉伸力学性能均显著提高：298和473K时的抗拉强度分别从ZK60合金的355和120MPa逐渐提高至ZK60-2.98Gd合金的380和164MPa。挤压态拉伸断口呈现典型的韧性断裂特征。

简介：Micro-arcoxidation(MAO)processwascarriedoutinanoptimizeddualelectrolytesystemtofabricateacompact,smooth,andcorrosionresistantcoatingonZK60Mgalloy.Themicrostructuralcharacteristicsofcoatingwereinvestigatedbyscanningelectronmicroscopy(SEM)coupledwithanenergydispersivespectrometer(EDS)andX-raydiffraction(XRD).Testofmasslosswasconductedata3.5%NaClsolutiontoassesstheresistancetocorrosion.ThebondingstrengthbetweenthecoatingandZK60substratewasevaluatedusingscratchexperiment.TheresultsrevealthatMgAl2O4andMgOarethemainphasesofceramiccoatingobtainedinthedualelectrolytesystem.Thecorrosionrateofcoatingpreparedintheoptimizeddualelectrolyteisonly0.0061gám-2áh-1,whichdemonstratesexcellentcorrosionresistance.Thisismainlyduetothecompact,uniformcoatingwithhighbondingstrength.