Preliminary study on the fabrication of 14Cr-ODS FeCrAl alloy by powder forging

来源 :材料科学技术(英文版) | 被引量 : 0次 | 上传用户:estone
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A simple powder forging process was presented herein to fabricate an Fe-14Cr-4.5Al-2W-0.4Ti-0.5Y2O3 ODS FeCrAI alloy.The forged alloy exhibits a high density that exceeds 97%of the theoretical density.The ODS alloy was investigated in terms of the residual porosity,morphology and phase structure of oxide nanoparticles,impact toughness and tensile properties.It was found that refined grains were obtained during powder forging.A residual porosity less than 1.1%has no impact on the precipitation of oxide nanoparticles.The average diameter of the oxide particles is 7.99 nm,with a number density of 2.75 x 1022 m-3.Almost all of the oxides are identified as orthorhombic YAlO3 particles.The refined grains and uniformly distributed oxide nanoparticles enable the alloy to show excellent mechanical strength and ductility below 700℃,and enable the ductile-to-brittle transition temperature to be close to room temperature.However,a slight decrease in strength at 1000℃and the Charpy upper shelf energy has been suggested to be due to the residual porosity.These results indicate that powder forging can be used as a promising technique for the fabrication of ODS alloys.
其他文献
为了准确预测2.5D编织复合材料的纵向力学性能,本工作以2.5D等厚度和变厚度编织复合材料为研究对象,基于细观结构表征结果,建立了一种考虑表面挤压效应和纱线错位滑移影响的2.5D等厚度和变厚度编织复合材料的全胞和三胞模型;并在所建立的全胞和三胞几何模型的基础上,基于逐渐损伤法开展了2.5D等厚度和变厚度编织复合材料的数值模拟分析,对不同结构的纵向刚度和强度进行了预测,模拟了不同结构的损伤扩展过程和损伤行为,并与实验结果进行对比验证.结果表明:考虑表面挤压效应和纱线错位滑移影响的全胞和三胞模型能更准确地预测
微波辐照乳液聚合技术具有产率高、节能省时等优点.本工作利用微波辐照,采用半连续种子乳液聚合法制备了具有明显核壳结构的聚硅氧烷/聚丙烯酸酯复合乳液;利用傅里叶变换红外光谱、粒度分析、核磁分析、透射电镜、热重分析等技术手段对产物进行了系统化表征,研究了偶联剂(γ-甲基丙烯酰氧基丙基三异丙氧基硅氧烷,C-1757)的用量对乳液聚合和复合胶膜性能的影响.结果表明:复合乳胶粒的平均粒径均小于100 nm,具有明显的核/壳结构;随着偶联剂用量的增加,复合乳胶粒粒径增大,分布变窄,制备的复合胶膜吸水率明显降低,力学性能
以苯酚、甲醛和氢氧化钠为改性剂,通过原位浸渍法对杉木木材进行了改性研究.探讨了浸渍压力、浸渍温度、浸渍时间和原位固化温度对改性杉木木材浸渍效果、强化效果和尺寸稳定效果的影响,并对改性杉木木材的化学结构、内部形貌、结晶结构和耐热性能进行了表征.结果表明,浸渍压力为0.5 MPa、浸渍温度为50℃、浸渍时间为32 h和原位固化温度为80℃时,改性杉木木材的浸渍效果、强化效果和尺寸稳定效果最佳.苯酚与甲醛在杉木木材中发生原位反应,既填充了杉木木材内部纹孔、细胞腔和细胞间隙,又与杉木木材中反应性羟基形成了氢键和化
The effect of lamellar orientation on the deformation behavior of eutectic high entropy alloy at the micrometer scale,and the roles of two rarely explored laminate orientations(i.e.,the lamellar orien-tation at~0° and 45° angles with the loading direction
Low-cost,high safety and environment-friendly aqueous energy storage systems(ESSs)are huge poten-tial for grid-level energy storage,but the(de)intercalation of metal ions in the electrode materials(e.g.vanadium oxides)to obtain superior long-term cycling
A novel method of liquid metallic film(LMF)bonding was developed to join titanium zirconium molyb-denum alloy(TZM)and Nb-Zr alloy with a Ni interlayer.Using this method,a Ni-Zr liquid phase was formed by the eutectic reaction and then squeezed out from th
Laser additive manufacturing(LAM)technique has unique advantages in producing geometrically com-plex metallic components.However,the poor low-cycle fatigue property(LCF)of LAM parts restricts its widely used.Here,the microstructural features of a Ti-6Al-4
The crystal structure and physical properties of Nb25Mo5+xRe35Ru25-xRh10(0≤x≤10)and Nb5Mo35-yRe15+yRu35Rh10(0≤y≤15)high-entropy alloys(HEAs)have been studied by X-ray diffraction,electrical resistivity,magnetic susceptibility,and specific heat measurement
The development of high temperature phase change materials(PCMs)with great comprehensive per-formance is significant in the future thermal energy storage system.In this study,novel and durable Al-Si/Al2O3-AlN composite PCMs with controllable melting tempe
Microstructural evolution of a refractory tantalum-tungsten alloy(Ta-4%W)after cold rolling from small to large von-Mises strains(0.12-2.7)was quantitatively studied using transmission electron microscopy.Grain subdivision was observed to take place at tw