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首页> 外文期刊>Materials Science and Engineering >Microstructure evolution and mechanical properties of ODS FeCrAl alloys fabricated by an internal oxidation process
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Microstructure evolution and mechanical properties of ODS FeCrAl alloys fabricated by an internal oxidation process

机译：内部氧化法制备ODS FeCrAl合金的组织演变和力学性能

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摘要

The fabrication of oxide dispersion strengthened (ODS) FeCrAl alloys by an innovative internal oxidation process is presented herein. The internal oxidation process for a precursor ODS FeCrAl alloy powder consists of two consecutive procedures. Active Y is segregated and enriched on the surface and grain boundaries of the ferritic powder during the first vacuum treatment. Yttrium oxide dispersoids are preferentially generated during the next oxidation treatment and become the precursors for the nanometric oxide precipitates in the subsequent hot consolidation. Nanometric Y2O3 and Y-Al-O precipitates are observed in the nominal compositions of Fe-16C-4.5Al-2W-0.5Ti-0.5V-0.2Y, Fe-16Cr-4.5Al-2W-0.5Ti-0.5V-0.5Y and Fe-14Cr-4.5Al-2W-0.5Ti-0.25Zr-0.8Y alloys and show a wide size distribution range from less than 10 nm to a maximum of 400 nm. No observable carbide, nitride inclusions or Al2O3 particles are identified. The improvement in the tensile strength of ODS alloys fabricated by the oxidation process is attributed to the dispersed nanometric oxide precipitates. The good ductility of the alloys is ascribed to the deficiency of ultrafine grains.
机译：本文介绍了通过创新的内部氧化工艺制造的氧化物弥散强化（ODS）FeCrAl合金。 ODS前驱体FeCrAl合金粉末的内部氧化过程包括两个连续的过程。在第一真空处理期间，活性Y在铁素体粉末的表面和晶界上偏析并富集。氧化钇分散质优先在下一次氧化处理期间生成，并在随后的热固结中成为纳米氧化物沉淀的前体。在Fe-16C-4.5Al-2W-0.5Ti-0.5V-0.2Y，Fe-16Cr-4.5Al-2W-0.5Ti-0.5V-0.5的标称成分中观察到纳米Y2O3和Y-Al-O沉淀Y和Fe-14Cr-4.5Al-2W-0.5Ti-0.25Zr-0.8Y合金，其尺寸分布范围从小于10 nm到最大400 nm。没有发现可观察到的碳化物，氮化物夹杂物或Al2O3颗粒。通过氧化工艺制造的ODS合金的拉伸强度的提高归因于分散的纳米氧化物沉淀物。合金的良好延展性归因于超细晶粒的缺乏。

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  • 来源
    《Materials Science and Engineering》 |2019年第29期|42-51|共10页
  • 作者

    Li Jing; Wu Sajian; Ma Ping; Yang Ying; Wu Erdong; Xiong Liangyin; Liu Shi;

  • 作者单位

    Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, Mat Special Environm Div, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China;

    Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, Mat Special Environm Div, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China;

    Anhui Univ Technol, Anal & Testing Cent, Hefei 243002, Anhui, Peoples R China;

    China Nucl Power Technol Res Inst, ATF Res & Dev Team, Shenzhen 518000, Peoples R China;

    Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, Mat Special Environm Div, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China;

    Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, Mat Special Environm Div, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China;

    Chinese Acad Sci, Key Lab Nucl Mat & Safety Assessment, Mat Special Environm Div, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Oxide dispersion strengthened; Internal oxidation process; Nanometric Y-Al-O precipitates; Microstructure and mechanical properties;

    机译：增强氧化物弥散;内部氧化过程;纳米Y-Al-O析出物;显微组织和力学性能;

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