Enhancement of strength-ductility trade-off by microstructure control of C-doped FeNiCoCr HEA.

通过 C 掺杂 FeNiCoCr HEA 的微观结构控制增强强度-延展性权衡。

基本信息

  • 批准号:
    22K20478
  • 负责人:
  • 金额:
    $ 1.75万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Research Activity Start-up
  • 财政年份:
    2022
  • 资助国家:
    日本
  • 起止时间:
    2022-08-31 至 2024-03-31
  • 项目状态:
    已结题

项目摘要

The 1%C-doped CoCrFeNi HEA performed high deformability by larger 60% thickness reduction of cold-rolling without macroscopic crack. As-rolled sample obtained high dislocation density resulting in the microhardness of 398 HV. The microstructure evolution of as-rolled samples was studied during isochronal annealing (1 hour) at 978, 1078 and 1178 K in terms of grain morphology, dislocation density and carbide precipitation. The solute drag effect and carbide precipitations due to carbon addition delayed the recrystallization process. In the fully recrystallized microstructure after 1178 K heat-treatment, the average grain size is about 4 microns and the microhardness is about 228 HV. The fine recrystallized grains were resulted by large dislocation density of as-rolled sample.
1%C掺杂的CoCrFeNi热膨胀合金具有较高的变形能力,冷轧压下率可达60%以上,且无宏观裂纹。轧制态试样位错密度高,显微硬度达398 HV。在978,1078和1178 K等时退火(1小时)的晶粒形态,位错密度和碳化物析出的轧制样品的组织演变进行了研究。溶质的拖曳效应和碳化物的析出延缓了再结晶过程。在1178 K热处理后的完全再结晶组织中,平均晶粒尺寸约为4 μ m,显微硬度约为228 HV。轧制态试样位错密度大,导致再结晶晶粒细小。

项目成果

期刊论文数量(8)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
In-situ neutron diffraction study of dislocation density evolution during tensile deformation in Al-Mg Alloys
铝镁合金拉伸变形过程中位错密度演化的原位中子衍射研究
  • DOI:
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Thirathipviwat Pramote;Sega Nozawa ;Moe Furusawa;Onuki Yusuke;Hasegawa Makoto;Matsumoto Katsushi;Sato Shigeo
  • 通讯作者:
    Sato Shigeo
A Contribution of Large Dislocation Accumulation to Large Work Strengthening in FeNiCoCrMn High Entropy Alloy
FeNiCoCrMn高熵合金大位错积累对大加工强化的贡献
  • DOI:
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Thirathipviwat Pramote;Onuki Yusuke;Hasegawa Makoto;Sato Shigeo
  • 通讯作者:
    Sato Shigeo
Microstructure, dislocation density and microhardness of 1 %C-doped CoCrFeNi complex concentrated alloys during isochronal annealing
显微组织、%20位错%20密度%20和%20显微硬度%20of%201%20%C掺杂%20CoCrFeNi%20络合物%20浓缩%20合金%20期间%20等时%20退火
  • DOI:
    10.1016/j.jallcom.2022.167504
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    6.2
  • 作者:
    Thirathipviwat Pramote;Onuki Yusuke;Umemura Kazuki;Sato Shigeo
  • 通讯作者:
    Sato Shigeo
Superior fretting wear resistance of 30Nb5Ta30Ti15V20Zr refractory high entropy alloy in a comparison with Ti6Al4V
30Nb5Ta30Ti15V20Zr难熔高熵合金与Ti6Al4V相比具有优异的微动磨损性能
  • DOI:
    10.1016/j.matlet.2023.134105
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    3
  • 作者:
    Thirathipviwat Pramote;Onuki Yusuke;Vishnu Jithin;Kesavan Praveenkumar;Raheem Ansheed;Manivasagam Geetha;V Shankar Karthik;Hasegawa Makoto;Sato Shigeo
  • 通讯作者:
    Sato Shigeo
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THIRATHIPVIWAT PRAMOTE其他文献

THIRATHIPVIWAT PRAMOTE的其他文献

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{{ truncateString('THIRATHIPVIWAT PRAMOTE', 18)}}的其他基金

Microstructure control of biocompatible BCC high entropy alloys for achieving bone-like Young's modulus
生物相容性 BCC 高熵合金的微观结构控制以实现类骨杨氏模量
  • 批准号:
    23K13574
  • 财政年份:
    2023
  • 资助金额:
    $ 1.75万
  • 项目类别:
    Grant-in-Aid for Early-Career Scientists

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