crfeconitix高熵合金力学性能及耐腐蚀性能分析word格式论文.docxVIP

CrFeCoNiTix 高熵合金力学性能及耐腐蚀性能研究摘要近几年的高熵合金研究表明其具有高强度、高硬度、高耐磨性、耐腐蚀性、高热阻、高电阻和良好的电学以及磁学性能等。本文介于对CrFeCoNiTix 合金的热处理性能和耐腐蚀性能的研究则相对较少，从合金的力学性能、热处理工艺和耐腐蚀性能对CrFeCoNiTix合金进行研究。本文通过感应熔炼出CrFeCoNiTix合金，利用X射线衍射仪分析合金的结构和物相，合金的各向异性；研究合金结构与电子浓度、原子尺寸差和合金熵的关系；对脆性较大的CrFeCoNiTi1.5合金进行中低温退火处理，研究退火温度对合金性能的影响；观察合金表面形貌，利用扫描电镜自带的能谱仪对合金中元素分布情况进行分析；观察合金在海水中、稀硫酸和王水中的腐蚀情况，研究合金的耐腐蚀性能。结果发现，随着Ti 含量的增加CrFeCoNiTix合金各向异性先增大后减小；CrFeCoNiTix合金结构由FCC向BCC转变，同时伴随着HCP结构，随着Ti 含量的增加HCP也转变为BCC；中低温热处理时，热处理温度的提高有利于CrFeCoNiTi1.5中HCP结构相的析出；Ti含量的增加，Ni逐渐往晶间聚集，Cr和Fe逐渐由晶间向晶体中均匀分布，Co 和Ti 在晶间和晶体中分布都比较均匀；CrFeCoNiTi1.5在中低温退火处理过程中，随着温度的升高Cr、Fe、Co和Ni向晶体中聚集分布，Ti 逐渐向晶间聚集；CrFeCoNiTi1.0的腐蚀性能优于CrFeCoNiTi0.5。关键词微结构；热处理；退火处理；耐腐蚀性能CrFeCoNiTix High EntropyAlloyMechanical Propertiesand Corrosion ResistanceResearchAbstractHighentropyalloyasnewalloy,duetoitshighstrength,highhardness,high wearresistance,corrosionresistance,highthermalresistance,highresistanceand goodelectricalandmagneticproperties,etc.extensivelystudiedbyscholars.For corrosion CrFeCoNiTixAlloyenergyis relativelysmall.ByinductionmeltingoutCrFeCoNiTixalloy,usingX-raydiffractionanalysisofthestructureandcompositionofthealloyphase,anisotropyalloys;Alloystructure andelectrondensity,atomicsizedifferenceandtherelationshipbetweenentropy alloys;brittlelargerCrFeCoNiTi1.5alloysinlowreturnsprocessing,influenceof annealingtemperatureonthestructureofthealloy;alloysurfacemorphologywas observedbyscanningelectronmicroscopespectrometercomeswiththedistribution ofthealloyelementswereanalyzed;observealloyinseawater,sulfuricacidand Wangwater corrosion, corrosion resistance alloysstudied.ItwasfoundthatwithincreasingTicontent,CrFeCoNiTixalloyanisotropyand thendecreased;CrFeCoNiTixalloystructuralchangetoBCCbyFCC,accompanied byHCPstructure,withtheTicontentincreasesHCPalsointoBCC;inwhenthelow temperatureheattreatment,toimprovetheheattreatmenttemperatureisbeneficial CrFeCoNiTi1.5inHCPstructurephaseprecipitates;increasingTicontent,Ni graduallytointergranularaggregates,CrandFebytheuniformdistributionof