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预压缩变形对Zr-Sn-Nb-Fe-Cr-Cu合金时效析出行为的影响
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重庆大学 材料科学与工程学院

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国家自然科学基金资助(项目号 51371202, 51531005, 51421001), 中央高校基本科研业务费(项目号 106112017CDJQJ138803)


The effect of pre-compressed deformation on precipitation behavior of Zr-Sn-Nb-Fe-Cr-Cu alloy during aging
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College of Materials Science and Engineering,Chongqing University,Chongqing,China

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    摘要:

    本文采用扫描电子显微镜(SEM)和透射电子显微镜(TEM),系统研究了经6%和12%预压缩变形处理后Zr-Sn-Nb-Fe-Cr-Cu合金在时效过程中的第二相析出行为。研究结果发现,预变形量对Zr合金时效析出行为有显著的影响,在相同的时效条件下,预压缩变形量为12%的合金第二相粒子平均尺寸比6%的合金小约10nm;600℃下时效时,Zr合金的第二相粒子平均尺寸与预变形量呈线性反比关系。透射电镜分析结果表明,合金在500℃低温时效30min时先析出含有少量Cu元素的正交结构Zr3Fe相;当时效1800min后,除了大尺寸的Zr3Fe外还有六方结构的Zr(Fe,Nb)2析出,但预压缩变形量对Zr合金的第二相析出种类没有显著影响。

    Abstract:

    The precipitation behavior of second phase particles (SPPs) of Zr-Sn-Nb-Fe-Cr-Cu alloy after 6% and 12% pre-compressed deformation during aging was investigated by scanning electron microscope (SEM) and transmission electron microscope (TEM). It was found that the pre-deformation has a marked influence on precipitation behavior of Zr alloy. The average size of SPPs of 12% pre-compressed deformation samples was about 10nm larger than that of 6% pre-compressed deformation; and the average size of SPPs was linearly inversely proportional to the volume fraction of pre-deformation when the alloy was aging at 600℃. From TEM observation, the precipitates of orthorhombic Zr3Fe containing Cu element were detected when Zr alloys were aged at 550℃ for 30 minutes; the precipitates of hexagonal Zr(Fe,Nb)2 were also found with smaller size to Zr3Fe when the aging time prolonged to 1800 minutes. The pre-deformation has no remarkable impact on the type of SPPs.

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栾佰峰,郝绍燕,吴蔚然,李硕.预压缩变形对Zr-Sn-Nb-Fe-Cr-Cu合金时效析出行为的影响[J].稀有金属材料与工程,2019,48(8):2523~2530.[Luan Baifeng, Hao Shaoyan, Wu Weiran, Li Shuo. The effect of pre-compressed deformation on precipitation behavior of Zr-Sn-Nb-Fe-Cr-Cu alloy during aging[J]. Rare Metal Materials and Engineering,2019,48(8):2523~2530.]
DOI:10.12442/j. issn.1002-185X.20180146

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  • 收稿日期:2018-02-08
  • 最后修改日期:2018-02-27
  • 录用日期:2018-03-12
  • 在线发布日期: 2019-09-05
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