• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Engineering and Performance >Microstructure and Mechanical Properties of Nanostructured CoCrFeMoTi High-Entropy Alloy Fabricated by Mechanical Alloying and Spark Plasma Sintering
【24h】

Microstructure and Mechanical Properties of Nanostructured CoCrFeMoTi High-Entropy Alloy Fabricated by Mechanical Alloying and Spark Plasma Sintering

机译：机械合金化和火花等离子烧结制造的纳米结构COCRFEMOTI高熵合金的组织和力学性能

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

CoCrFeMoTi high-entropy alloy (HEA) was synthesized using mechanical alloying and spark plasma sintering. The corresponding microstructural features and phase composition were compared with those of CoCrFeNi, CoCrFeNiTix (x = 0, 0.3 and 0.5) and CoCrFeNiMox (x = 0, 0.3, 0.5 and 0.85) HEAs. Co, Cr, Fe, Mo and Ti elemental powders were mixed in equiatomic ratio and mechanically alloyed in a planetary ball mill at 300 rpm for up to 80 h. The influence of the milling duration on the evolution of microstructure, constituent phases and morphology was studied. After 40 h of ball milling, two supersaturated BCC solid solution phases were obtained. Milling time increasing resulted in grain refinement and higher solid solution homogenization characterized by a high internal strain. A partial phase transformation from BCC to intermetallic phases when the temperature exceeds 660 degrees C was revealed. After SPS consolidation, the Vickers hardness was 778 +/- 10 HV, in combination with an ultimate shear stress of 216 +/- 20 MPa and a yield shear stress of 81 +/- 15 MPa for the material sintered at 950 degrees C and 65 MPa. Further increasing in the sintering temperature resulted in enhanced hardness value of 1600 +/- 5 but reduced yield shear stress. The failure analysis revealed a brittle fracture of the synthesized materials.
机译：COCRFEMOTI高熵合金（HEA）是使用机械合金化和火花等离子体烧结合成的。将相应的微观结构特征和相位组成与Cocrfeni，CoCrfenitix（x = 0,0.3和0.5）和CoCrfenimox（x = 0,0.3,0.5和0.85）进行比较。 CO，Cr，Fe，Mo和Ti元素粉末以赤脂比混合，并在行星球磨机中以300rpm机械合金合金，高达80小时。研究了研磨持续时间对微观结构，构成阶段和形态的演变的影响。在球磨40小时后，获得了两种过饱和的BCC固溶体相。铣削时间增加导致晶粒细化和较高的固体溶液均质化，其特征在于高内部菌株。揭示了当温度超过660摄氏度时从BCC到金属间相的部分相变。 SPS固结后，维氏硬度为778 +/- 10 HV，结合为216 +/-20MPa的最终剪切应力和81 +/- 15MPa的屈服剪应力，用于950摄氏度的材料烧结65 MPa。在烧结温度下进一步增加导致增强硬度值为1600 +/- 5但降低的产率剪切应力。失效分析显示了合成材料的脆性断裂。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号