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冷轧对β-ZrTiAlV合金形变诱导马氏体相变的影响
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重庆大学 材料科学与工程学院

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TG146.4+14

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国家自然科学基金资助(项目号51531005,51571174,51421001),中央高校基本科研业务费(项目号 106112017CDJQJ138803)


The Effect of Rolling on Deformation-induced Martensite Transformation in a Metastable β-ZrTiAlV Alloy
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College of Materials Science and Engineering,Chongqing University

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    摘要:

    对β-ZrTiAlV合金分别采用室温和液氮低温轧制变形,通过X射线衍射(XRD)、光学显微镜(OM)、背散射电子衍射(EBSD)分析技术,研究轧制温度和轧制变形量对β-ZrTiAlV合金形变诱导马氏体相变及其微观组织演变规律的影响。实验分析结果表明,在室温或低温条件下变形后合金组织中都发生了β→α'形变诱导马氏体相变,同时在马氏体α'中产生(102)<110>孪晶,轧制变形量的增加促进相变马氏体的形成和孪晶变体数量的增加,而低温变形则抑制了形变诱导马氏体的形成,但更有利于孪晶的产生。轧制变形量为5%时,形变诱导马氏体以板条状分布于原始β晶粒中,当变形量增至10%后,少数β晶粒完全转变为α'相。

    Abstract:

    The influence of rolling reduction and temperatures at room and liquid nitrogen on the formation of deformation-induced martensite and microstructural evolution in a β-ZrTiAlV alloy was investigated by X-ray diffraction (XRD), optical microscopy (OM) and electron backscatter diffraction (EBSD) technique. The analysis of the phase composition and microstructure of the rolled alloy indicated that a deformation-induced martensite phase transformation process from body-centered cubic β to closed-packed hexagonal α'accompanying with (102) <110> twinning in the α'phase were simultaneously detected. With the increase of rolling reduction, deformation-induced phase transformation and the volume fraction of martensite variant were promoted. Nevertheless, lower temperature (liquid nitrogen) resulted in the inhibition of α'martensite transformation and the promotion of the (102) <110> twinning. When the specimen was subjected to the rolling reduction of 5%, plate-like deformation-induced martensite started appearing in the equiaxed parent β grains. However, when the rolling reduction increased to 10%, the deformation-induced martensite would be generated fully within some β grains.

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栾佰峰,谢辉,廖仲尼,李飞涛,毛敏.冷轧对β-ZrTiAlV合金形变诱导马氏体相变的影响[J].稀有金属材料与工程,2019,48(8):2495~2501.[Luan baifeng, Xie hui, Liao zhongni, Li feitao, Mao min. The Effect of Rolling on Deformation-induced Martensite Transformation in a Metastable β-ZrTiAlV Alloy[J]. Rare Metal Materials and Engineering,2019,48(8):2495~2501.]
DOI:10.12442/j. issn.1002-185X.20180030

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  • 收稿日期:2018-01-09
  • 最后修改日期:2018-03-05
  • 录用日期:2018-03-12
  • 在线发布日期: 2019-09-05
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