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Influence of Al Addition Upon the Microstructure and Mechanical Property of Dual-Phase 9Cr-ODS Steels

机译：Al添加对双相9Cr-ODS钢的微观结构和力学性能的影响

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摘要

With Al addition, dual-phase oxide dispersion strengthened (ODS) steels consisting of martensite and ferrite are fabricated by spark plasma sintering. It is found that Al addition has a negligible effect on martensite lath size, while the amount and size of ferrite grains are related to the Al content. M23C6 (M=Fe, Cr) carbides have been identified within the ferrite grains or along ferrite boundaries. With increasing Al concentration, more fine Y-Al-O oxide nanoparticles are formed. Upon annealing treatment, homogeneous and refined distribution of ferrite grains is obtained, which may involve the particle-stimulated nucleation of recrystallization caused by the large sized M23C6. As Al is increased from 0.05 to 0.1wt%, the tensile strength of the annealed steel is decreased, as well as its ductility. For the annealed 9Cr-ODS steel containing 0.1wt% Al, in tensile loading the large sized M23C6 along ferrite boundaries would facilitate the cracking along boundaries between the hard annealed ferrite and soft annealed martensite, producing the mixed fracture of dimple and intergranular fracture.
机译：通过Al加法，通过火花等离子体烧结制造由马氏体和铁氧体组成的双相氧化物分散体（ODS）钢。发现Al Alight对马氏体车床尺寸的影响可忽略不计，而铁氧体晶体的量和尺寸与Al含量有关。 M23C6（M = Fe，Cr）碳化物已在铁氧体颗粒或沿铁氧体边界鉴定。随着Al浓度的增加，形成更精细的Y-Al-O氧化物纳米颗粒。在退火处理时，获得均匀和精制的铁氧体晶体分布，这可能涉及由大尺寸的M23C6引起的颗粒刺激的重结晶核。由于Al增加到0.05至0.1wt％，退火钢的拉伸强度降低，以及其延展性。对于含有0.1wt％Al的退火的9Cr-ODS钢，在拉伸负载中，沿铁氧体边界的大尺寸M23C6将沿着硬退火铁氧体和软退火马氏体之间的边界促进裂缝，产生凹坑和晶状体骨折的混合骨折。

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  • 来源
    《Metals and Materials International》 |2019年第1期|共11页
  • 作者

    Zhou Xiaosheng; Ma Zongqing; Yu Liming; Huang Yuan; Li Huijun; Liu Yongchang;

  • 作者单位

    Tianjin Univ Sch Mat Sci &

    Engn State Key Lab Hydraul Engn Simulat &

    Safety Tianjin 300354 Peoples R China;

    Tianjin Univ Sch Mat Sci &

    Engn State Key Lab Hydraul Engn Simulat &

    Safety Tianjin 300354 Peoples R China;

    Tianjin Univ Sch Mat Sci &

    Engn State Key Lab Hydraul Engn Simulat &

    Safety Tianjin 300354 Peoples R China;

    Tianjin Univ Sch Mat Sci &

    Engn State Key Lab Hydraul Engn Simulat &

    Safety Tianjin 300354 Peoples R China;

    Tianjin Univ Sch Mat Sci &

    Engn State Key Lab Hydraul Engn Simulat &

    Safety Tianjin 300354 Peoples R China;

    Tianjin Univ Sch Mat Sci &

    Engn State Key Lab Hydraul Engn Simulat &

    Safety Tianjin 300354 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 金属材料;
  • 关键词

    Oxide nanoparticle; Al addition; Carbides; Particle-stimulated nucleation;

    机译：氧化物纳米粒子;Al加法;碳化物;粒子刺激的成核;

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