-1時,變形試樣的流動曲線完全不同。力學流動曲線的差異與DRX和織構演化過程有關。在1050 ℃和0.1 s-1下壓縮后,獲得了結合<110>和<100>的雙組分組織結構,這是因為高溫下擴散控制的溶質阻力占主導地位。此外,bcc相的影響依賴于界面邊界和顆粒周圍的應變不均勻性,因為沒有發(fā)生相變,大部分應變由fcc相容納。"/>

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FeCrNiMn雙相高熵合金高溫壓縮過程中的組織演變
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作者單位:

1.蘇州熱工研究院有限公司,江蘇 蘇州 215004;2.西安超晶科技股份有限公司,陜西 西安 710200;3.陜西省先進金屬結構材料精確熱成形重點實驗室,陜西 西安 710200

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基金項目:

江蘇省自然科學基金(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:

    為了研究雙相高熵合金(HEA)在高溫變形過程中的微觀組織演變,在900至1050 ℃的溫度下進行了不同應變速率的壓縮試驗。選擇了4種典型的流動曲線,并對相應的微觀組織進行了分析,以研究雙相HEA的動態(tài)再結晶(DRX)和織構演變。結果表明,在應變速率為0.1和0.01 s-1時,變形試樣的流動曲線完全不同。力學流動曲線的差異與DRX和織構演化過程有關。在1050 ℃和0.1 s-1下壓縮后,獲得了結合<110>和<100>的雙組分組織結構,這是因為高溫下擴散控制的溶質阻力占主導地位。此外,bcc相的影響依賴于界面邊界和顆粒周圍的應變不均勻性,因為沒有發(fā)生相變,大部分應變由fcc相容納。

    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,吳天棟,衛(wèi)娜,蔡振,薛祥義.FeCrNiMn雙相高熵合金高溫壓縮過程中的組織演變[J].稀有金屬材料與工程,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
  • 錄用日期:2021-12-09
  • 在線發(fā)布日期: 2023-01-11
  • 出版日期: 2022-12-30