Influence of Gadolinium with Small Content on Recrystallization Behaviour inSilver-Gold Alloys

Ag-Aualloyisatypicalis0morphousbinnyalloysystem.TheeffectofAucontent(<5%)inAg-Aualloysonrecrystallizati0ntemperaturehasbeenstudiedinRef.[1].Itwasf0undthatoftherelationshipwasdifferentfr0mthat0ftheCucofitentonrecrystallizati0ntemperatureinAg-Cualloyswhichisalindteds0lublealloysys-t..'2].InRefs.[3]and[41theinfluenceofsmal1additi0n0fGdandSm0ntherecrysta]iIza-tionbehavi0r0fAg-Cu.alloyshasbeenstudied,respectively.InthispaPertheresultsab0uttheialluence0fsmallGdadditi0nontherecrystal-lizationb…     

Effect of Impurities and Cerium on Stress Concentration Sensitivity of Al-Li Based Alloys

Ｔｈｅｒｅａｒｅａｌｗａｙｓｓｏｍｅｇｅｏｍｅｔｒｉｃａｌｄｉｓｃｏｎ ｔｉｎｕｉｔｉｅｓ ,ｓｕｃｈａｓｆａｓｔｅｎｅｒｈｏｌｅｓ ,ｆｉｌｌｅｔｓａｎｄｇｒａｖｅｓ ,ｉｎｐｒａｃｔｉｃａｌａｉｒｃｒａｆｔｃｏｎｓｔｒｕｃｔｉｏｎｃｏｍ ｐｏｎｅｎｔｓ .Ｉｎｔｈｅｖｉｅｗｏｆｍａｔｅｒｉａｌｍｅｃｈａｎｉｃｓ ,ｔｈｅｓｅｇｅｏｍｅｔｒｉｃａｌｄｉｓｃｏｎｔｉｎｕｉｔｉｅｓｃａｎｂｅｃｏｎ ｓｉｄｅｒｅｄａｓｎｏｔｃｈｅｓ .Ｓｔｒｅｓｓｃｏｎｃｅｎｔｒａｔｉｏｎｕｓｕａｌ ｌｙｏｃｃｕｒｓａｔｎｏｔｃｈ…     

Behavior of Cerium Addition in the Binary Fe-28Al Alloy

ｎｔｅｒｍｅｔａｌｉｃｓｂａｓｅｄｏｎＦｅ３Ａｌａｆｏｒｄｅｘｃｅｌｅｎｔｏｘｉｄａｔｉｏｎｒｅｓｉｓｔａｎｃｅｐｒｏｐｅｒｔｉｅｓａｔｒｅｌａｔｉｖｅｌｙｌｏｗｃｏｓｔａｎｄｍａｔｅｒｉａｌｓｄｅｎｓｉｔｙ，ｍａｋｉｎｇｔｈｅｍｃａｎｄｉｄａｔｅｓ...     

Fatigue and Fracture Mechanisms of Aluminum Lithium Alloy Containing Cerium

Ｔｈｅｒｅｈａｖｅｂｅｅｎｃｏｎｓｉｄｅｒａｂｌｅｉｎｖｅｓｔｉｇａｔｉｏｎｓｏｎｉｎｔｒｉｎｓｉｃｔｏｕｇｈｅｎｉｎｇ．Ｔｈｅａｔｅｎｔｉｏｎｈａｓｂｅｎｐａｉｄｐｒｏｇｒｅｓｉｖｅｌｙｔｏｔｈｅｍｅｃｈａｎｉｓｍｏｆｅｘｔｒｉｎｓｉｃｔｏｕｇｈｅ...     

Theoretical Analysis on Tensile Strength of ZA22/Al2O3 Short Fiber Composite Added with Ce

ＴｈｅｏｒｅｔｉｃａｌＡｎａｌｙｓｉｓｏｎＴｅｎｓｉｌｅＳｔｒｅｎｇｔｈｏｆＺＡ２２／Ａｌ２Ｏ３ＳｈｏｒｔＦｉｂｅｒＣｏｍｐｏｓｉｔｅＡｄｄｅｄｗｉｔｈＣｅＹｕＳｉｒｏｎｇ（于思荣）１，ＨｅＺｈｅｎｍｉｎｇ（何镇明）２，ＲｅｎＬｕｑｕａｎ（任露泉）１...     

Recrystallization and Morphology of Microstructure in Al-Sc Alloys

Minor addition of Sc to aluminum results in the rapid precipitation of homogeneously distributed Al3Sc dispersoids. The presence of Al3Sc dispersoids is more effective recrystallization inhibitors. Our work established the precipitation of homogeneously distributed Al3Sc dispersoids, which are coherent with the matrix, have the L12 structure. It was also established that the addition of Sc was effective in improving the recrystallization resistance.     

Effect of Rare Earth Metals on Microstructure of Directional Solidified Al－3Li Alloy

ＥｆｆｅｃｔｏｆＲａｒｅＥａｒｔｈＭｅｔａｌｓｏｎＭｉｃｒｏｓｔｒｕｃｔｕｒｅｏｆＤｉｒｅｃｔｉｏｎａｌＳｏｌｉｄｉｆｉｅｄＡｌ－３ＬｉＡｌｌｏｙ￥ＷａｎｇＬｉ－Ｍｉｎ；ＤａｎｇＰｉｎｇ；ＤｕＦｕ－Ｙｉｎｇ；ＺｈａｏＭｉｎ－Ｓｈｏｕ（Ｃｈａｎｇｃｈｕ...     

铝及铝合金细化剂的研究

综述了晶粒细化剂的发展及历史，细化剂的细化机理和各种细化剂的比较。并着重介绍了新一代的AlTiC晶粒细化剂。     

Effects of La-Rich Rare Earth Alloys on Structure and Mechanical Properties of ZL101A Alloy

ＥｆｅｃｔｓｏｆＬａＲｉｃｈＲａｒｅＥａｒｔｈＡｌｏｙｓｏｎＳｔｒｕｃｔｕｒｅａｎｄＭｅｃｈａｎｉｃａｌＰｒｏｐｅｒｔｉｅｓｏｆＺＬ１０１ＡＡｌｏｙＬｉＨｕａｊｉ（李华基），ＴａｎＨｕｉｘｉｎ（谭会辛），ＺｈｕＺｈｅｎｃｈａｏ（祝阵超）（Ｃｈｏｎｇ...     

Effect of La, Ce on Taxus Cuspidata Cell Growth, Biosynthesis and Release of Taxol

Ｔａｘｏｌ，ａｎａｔｕｒａｌｐｒｏｄｕｃｔｗｉｔｈｕｎｉｑｕｅａｎｔｉｃａｎｃｅｒａｃｔｉｖｉｔｙ，ｗａｓｆｉｒｓｔｌｙｓｅｐａｒａｔｅｄｂｙＷａｎｉｅｔａｌ．［１］ｆｒｏｍｔｈｅｂａｒｋｏｆＢａｘｕｓＢｒｅｖｉｆｏｌｉａｉｎｔｈｅ１９７０ｓ．Ｔａ...     

Influence of Rare Earths on High Temperature Mechanical Properties of ZA 27 Alloys

ＺＡ２７ａｌｏｙｐｏｓｅｓｅｓｇｏｏｄｍｅｃｈａｎｉｃａｌｐｒｏｐｅｒｔｉｅｓ,ｈｉｇｈｗｅａｒｒｅｓｉｓｔａｎｃｅａｎｄａｎｔｉｆｒｉｃｔｉｏｎｐｅｒｆｏｒｍａｎｃｅ,ｅｓｐｅｃｉａｌｙｈａｓｈｉｇｈｅｒｔｅｎｓｉｌｅｓｔｒｅｎｇｔｈａｔｒｏｏ...     

Luminescence Properties of Ce~(3 ) in KMF_3(M=Mg,Ca,Sr,Ba) Hosts with Perovskite Structure

ＬｕｍｉｎｅｓｃｅｎｃｅＰｒｏｐｅｒｔｉｅｓｏｆＣｅ３＋ｉｎＫＭＦ３（Ｍ＝Ｍｇ，Ｃａ，Ｓｒ，Ｂａ）ＨｏｓｔｓｗｉｔｈＰｅｒｏｖｓｋｉｔｅＳｔｒｕｃｔｕｒｅＺｈａｎｇＪｉｌｉｎ（张吉林）（ＬｉａｏｙａｎｇＰｅｔｒｏｃｈｅｍｉｃａｌＥｎｇｉｎｅｒｉｎｇ...     

Effect of Rare Earth on Superplasticity of Zn—5Al Eutectic Alloy

Zｎ Ａｌａｌｌｏｙｉｓｏｎｅｏｆａｌｌｏｙｍａｔｅｒｉａｌｓｗｉｄｅ ｌｙｕｓｅｄｉｎｉｎｄｕｓｔｒｙ .Ｚｎ 5Ａｌｅｕｔｅｃｔｉｃａｌｌｏｙｉｓｎｏｔｏｎｌｙｅｘｔｅｎｓｉｖｅｌｙｕｓｅｄａｓｄｉｅ ｃａｓｔｉｎｇａｌｌｏｙ ,ｈｏｔｐｌａｔｉｎｇａｎｄｓｐｒａｙｉｎｇａｌｌｏｙ ,ｂｕｔｏｂｔａｉｎｓｒｅｃｏｇｎｉｔｉｏｎｉｎｓｕｐｅｒｐｌａｓｔｉｃｓｈａｐｉｎｇａｎｄｓｕｐｅｒ ｐｌａｓｔｉｃｔｈｅｏｒｅｔｉｃａｌｒｅｓｅａｒｃｈｅｓｏｗｉｎｇｔｏｉｔｓｅｘ ｔｒａｏｒｄｉｎａｒｙｓｕｐｅｒｐｌａ…     

稀土对Al、Zn及其合金11年大气腐蚀的影响

本文就Ａｌ、Ｚｎ 及其稀土合金和Ｆｅ等１２ 种试样进行了长达１１ 年的大气腐蚀试验。结果表明,Ａｌ、Ｚｎ及其合金中添加适量稀土可以不同程度提高其耐蚀性。特别是Ａｌ、Ｚｎ 合金中加入稀土后提高耐蚀性明显,Ａｌ－４３．４％ Ｚｎ－１．６％ Ｓｉ及Ｚｎ－５％ Ａｌ合金中加入０．１％ ＲＥ耐蚀性分别提高０．５ 倍和１．０５ 倍。稀土的适宜加入量小于０．５％ 。     

Effects of bias voltage on coating structures and anticorrosion performances of PA-PVD Al coated NdFeB magnets

Al coated NdFeB magnets were prepared by plasma-assisted-physical-vapor-deposition(PA-PVD)method fo r enhancing the corro sion resistance.Mo rphologies and structures were characterized by an Xray diffractometer and a scanning electron microscope.Corrosion behaviors of the samples with different bias voltages were studied by electrochemical methods and neutral salt spray test,respectively.The bias voltage during the deposition process was optimized according to the coating structures and corrosion resistances.The density and flatness of Al coating increase with increasing the bias voltage,and at the same time the thickness decreases.The coating density and thickness turn to be stable when bias voltage is 1800 V.Also,the corrosion behaviors of PA-PVD Al coatings in different media,such as NaOH,HNO_3 and NaCl solutions,were studied.The self-corrosion potentials(E_(corr)) of PA-PVD Al coatings almost keep constant in NaOH and HNO_3 solutions with diffe rent concentrations.However,the self-corrosion current densities(J_(corr)) decrease with the increasing concentrations.E_(corr) shifts to negative potential and J_(corr)decreases gradually when increasing the concentration of NaCl solution.The corrosion mechanisms of Al coatings are discussed based on the corrosion behaviors in different media.     

稀土6063变形铝合金阳极氧化与电解着色的研究

本文系在硫酸、硫酸亚锡溶液中对添加有稀土的6063变形铝合金进行了阳极氧化和电解着色。比较系统地研究了氧化电解液的浓度、温度、时间、电流密度对膜层厚度的影响;以及着色电流密度、电压、时间对膜层色度的影响。结果证实,稀土可以明显地提高6063变形铝合金氧化膜厚度和电解着色的色度,稀土含量以0.30％为好。     

Effects of Cerium on Texture and Mechanical Property of 2090 Aluminium-Lithium Alloys

Conventional processing of Al-Li alloys asstructural materials used in aerospace industries such as rolling, prestretching, solutioningand aging will produce various textures such asrolling texture, recrystallization texture whichcan lead to mechanical anisotropy. Adding Ceto Al-Li alloys by means of rare earth microalloying and purification, the mechanical properties will be improved[' ~3). It is significant tostudy the actions of Ce on Al-Li alloys from theviewpoint of texture, hilt resea…     

Effects of Sm on Phase Transformation in Ni-Mn-Ga Alloys

The effects of small amount additions of Sm on the martensitic transition and magnetic phase transition of polycrystalline Ni-Mn-Ga alloys were investigated. The experimental results show that the Sm doped alloys also undergo a thermal-elastic martensitic transformation and reverse transformation during cooling and heating process and the addition of Sm decreases the martensitic transformation temperature and Curie temperature in different degree respectively. Ni-Mn-Ga alloys of adding Sm still possess Heusler structure, but their crystal lattice parameters are modified slightly. The addition of a proper amount of Sm does not basically decrease Tc of the alloy when avoiding the appearance of second phase. In addition, the doped alloys have favorable toughness because of grain refinement of Sm.     

Effects of Yttrium and Cerium on Compression Properties of Ni_3Al-Base Alloys

The effects of yttrium and cerium on the compression properties of Ni_3Al-base alloys have beeninvestigated.The results reveal that the addition of about 0.1 wt% Y to Ni_3Al-B alloy is effective for improvingthe ductility at 1100℃.A ductility increase of about 100% is observed for this Y doped alloy.The yttrium re-fines grains of the alloy.An YNi_5 phase is found to be precipitated on the grain boundaries in the alloy con-taining 0.3 wt% Yor more.Adding about 0.1 wt% Ce to Ni_3Al-B-Cr-Zr alloy obviously improves the ductilityof the alloy at 1100℃.A ductility increase of about 50% is obtained for this alloy.The added cerium also pre-vents the formation of γ+γ' eutectic and refines it.The bulk phase of CeNi_4 appeares at the front of the eutecticin the alloys containing 0.1 wt% Ce or more.     

稀土在铝、铜、镁合金中的作用与应用

我国是一个稀土资源丰富的国家,从60年代起就开始了稀土应用的研究。本文扼要介绍稀土元素在铝合金、铜合金、镁合金中的作用与应用情况,以期推动稀土在有色金属中的应用。