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FeCrNiMn双相高熵合金高温压缩过程中的组织演变
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1.苏州热工研究院有限公司,江苏 苏州 215004;2.西安超晶科技股份有限公司,陕西 西安 710200;3.陕西省先进金属结构材料精确热成形重点实验室,陕西 西安 710200

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基金项目:

江苏省自然科学基金(Grants No BK2018021)


Microstructure Evolution of FeCrNiMn Duplex High Entropy Alloys During High-Temperature Compression
Author:
Affiliation:

1.Suzhou Nuclear Power Research Institute, Suzhou 215004, China;2.Xi'an Chao Jing Technology Co., Ltd, Xi'an 710200, China;3.Shaanxi Key Laboratory of Advanced Metal Structural Materials Precision Thermoforming, Xi'an 710200, China

Fund Project:

Natural Science Foundation of Jiangsu Province (BK2018021)

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    摘要:

    为了研究双相高熵合金(HEA)在高温变形过程中的微观组织演变,在900至1050 ℃的温度下进行了不同应变速率的压缩试验。选择了4种典型的流动曲线,并对相应的微观组织进行了分析,以研究双相HEA的动态再结晶(DRX)和织构演变。结果表明,在应变速率为0.1和0.01 s-1时,变形试样的流动曲线完全不同。力学流动曲线的差异与DRX和织构演化过程有关。在1050 ℃和0.1 s-1下压缩后,获得了结合<110>和<100>的双组分组织结构,这是因为高温下扩散控制的溶质阻力占主导地位。此外,bcc相的影响依赖于界面边界和颗粒周围的应变不均匀性,因为没有发生相变,大部分应变由fcc相容纳。

    Abstract:

    To investigate the microstructure evolution during high-temperature deformation of the duplex high entropy alloys (HEAs), compression tests were performed at temperatures from 900 °C to 1050 °C with different strain rates. Four typical flow curves were selected and the corresponding microstructures were analyzed to investigate the dynamic recrystallization (DRX) and texture evolution of the duplex HEAs. The results show that the flow curves are totally different for samples deformed at the strain rate of 0.1 and 0.01 s-1. The difference of mechanical flow curves is correlated with the DRX and texture evolution process. Two-component textures combining the <110> and <100> components are obtained after compression at 1050 °C and 0.1 s-1. It is attributed to the dominance of diffusion-controlled solute drag at high temperature. Moreover, the effect of bcc phase relies on interphase boundary and strain heterogeneity around these particles, since no phase transformation occurs and most of the strain is accommodated by fcc phase.

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梅金娜,吴天栋,卫娜,蔡振,薛祥义.FeCrNiMn双相高熵合金高温压缩过程中的组织演变[J].稀有金属材料与工程,2022,51(12):4496~4501.[Mei Jinna, Wu Tiandong, Wei Na, Cai Zhen, Xue Xiangyi. Microstructure Evolution of FeCrNiMn Duplex High Entropy Alloys During High-Temperature Compression[J]. Rare Metal Materials and Engineering,2022,51(12):4496~4501.]
DOI:10.12442/j. issn.1002-185X.20210986

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  • 收稿日期:2021-11-12
  • 最后修改日期:2023-01-03
  • 录用日期:2021-12-09
  • 在线发布日期: 2023-01-11
  • 出版日期: 2022-12-30