采用轧制法+模拉法组合异型钢丝成型方法,经过3道连续圆形拉拔加2道轧制及1道异型模拉拔,研制了1.3 mm×0.6 mm 316Ti不锈钢椭圆钢丝。采用金相显微镜与二次元影像测量仪对椭圆钢丝形状及尺寸进行测量,通过相关力学性能检测设备对...采用轧制法+模拉法组合异型钢丝成型方法,经过3道连续圆形拉拔加2道轧制及1道异型模拉拔,研制了1.3 mm×0.6 mm 316Ti不锈钢椭圆钢丝。采用金相显微镜与二次元影像测量仪对椭圆钢丝形状及尺寸进行测量,通过相关力学性能检测设备对其拉伸性能、扭转性能、缠绕及弯曲性能进行检测。结果表明:研制的椭圆钢丝长短轴公差均在±0.005 mm范围内,力学性能均满足技术条件要求。展开更多
Selective Laser Melting(SLM),one of the metal additive manufacturing methods in the powder bed,is frequently used in the production of 316L stainless steel biomaterial.In this study,the effect of duplex surface modifi...Selective Laser Melting(SLM),one of the metal additive manufacturing methods in the powder bed,is frequently used in the production of 316L stainless steel biomaterial.In this study,the effect of duplex surface modification(metal additive manufacturing and plasma oxidizing)on the corrosion resistance of 316L was investigated.Ti6Al4V layer was formed by additive manufacturing on 316L produced by selective laser melting method.The obtained layered Ti6Al4V/316L samples were oxidized by plasma at 650℃–750℃ and 1 h–4 h parameter conditions.TiO_(2)ceramic layer was formed on the Ti6Al4V/316L structure by plasma oxidation process in several layer thicknesses.Corrosion properties of the TiO_(2)layer were determined by Open Circuit Potential(OCP),potentiodynamic polarization,and Electrochemical Impedance Spectroscopy(EIS)tests in Simulated Body Fluid(SBF)solution.Also,the surface characterizations of the samples were determined by the Vickers micro-hardness tester,Scanning Electron Microscopy(SEM),and X-Ray Diffractometer(XRD)analysis.From the results,it was obtained that the corrosion resistance of the plasma oxidized was higher than the untreated 316L and layered Ti6Al4V/316L samples.The best corrosion resistance was obtained under the 750℃ and 4 h parameter conditions because of the increasing plasma oxidizing time and temperature.展开更多
文摘针对钠冷快中子增殖反应堆(简称快堆)燃料元件包壳材料316以及15-15Ti奥氏体不锈钢,讨论了通过晶界工程(grain boundary engineering,GBE)技术进一步提高材料抗辐照肿胀以及抗蠕变性能的可行性.通过GBE技术能够大幅增加材料中与孪晶相关的低Σ重合位置点阵(coincidence site lattice,CSL)晶界比例.快堆燃料元件包壳在固溶退火处理后还要经过20%左右的冷加工变形,目的是在显微组织中引入大量位错,吸收由辐照产生的点缺陷,并增加吸收裂变产物的陷阱.如果在这样的冷加工变形前大幅提高材料的低ΣCSL晶界比例,使冷加工变形时的位错滑移在具有特殊取向关系的晶粒间的传播以及位错在特殊结构晶界处的堆积排列发生变化,那么就有可能使冷加工后位错的分布状态有利于吸收更多的由辐照产生的点缺陷,提高材料抗辐照肿胀的能力.
文摘采用轧制法+模拉法组合异型钢丝成型方法,经过3道连续圆形拉拔加2道轧制及1道异型模拉拔,研制了1.3 mm×0.6 mm 316Ti不锈钢椭圆钢丝。采用金相显微镜与二次元影像测量仪对椭圆钢丝形状及尺寸进行测量,通过相关力学性能检测设备对其拉伸性能、扭转性能、缠绕及弯曲性能进行检测。结果表明:研制的椭圆钢丝长短轴公差均在±0.005 mm范围内,力学性能均满足技术条件要求。
基金the Erzurum Technical University High Technology Research and Application Centre(ETÜ-YÜTAM)for their valuable contribution.
文摘Selective Laser Melting(SLM),one of the metal additive manufacturing methods in the powder bed,is frequently used in the production of 316L stainless steel biomaterial.In this study,the effect of duplex surface modification(metal additive manufacturing and plasma oxidizing)on the corrosion resistance of 316L was investigated.Ti6Al4V layer was formed by additive manufacturing on 316L produced by selective laser melting method.The obtained layered Ti6Al4V/316L samples were oxidized by plasma at 650℃–750℃ and 1 h–4 h parameter conditions.TiO_(2)ceramic layer was formed on the Ti6Al4V/316L structure by plasma oxidation process in several layer thicknesses.Corrosion properties of the TiO_(2)layer were determined by Open Circuit Potential(OCP),potentiodynamic polarization,and Electrochemical Impedance Spectroscopy(EIS)tests in Simulated Body Fluid(SBF)solution.Also,the surface characterizations of the samples were determined by the Vickers micro-hardness tester,Scanning Electron Microscopy(SEM),and X-Ray Diffractometer(XRD)analysis.From the results,it was obtained that the corrosion resistance of the plasma oxidized was higher than the untreated 316L and layered Ti6Al4V/316L samples.The best corrosion resistance was obtained under the 750℃ and 4 h parameter conditions because of the increasing plasma oxidizing time and temperature.
