金属热处理 ›› 2025, Vol. 50 ›› Issue (9): 86-91.DOI: 10.13251/j.issn.0254-6051.2025.09.013

• 组织与性能 • 上一篇    下一篇

高纯钽周向轧制过程中沿厚度方向的组织与织构演变

李兆博1,2, 汪凯2, 方方1,2, 齐萌3, 葛栋梁3, 梁高杰3, 王爱娟3   

  1. 1.宁夏东方钽业股份有限公司, 宁夏 石嘴山 753000;
    2.西北稀有金属材料研究所宁夏有限公司 稀有金属特种材料国家重点实验室, 宁夏 石嘴山 753000;
    3.西安理工大学 材料科学与工程学院, 陕西 西安 710048
  • 收稿日期:2025-03-08 修回日期:2025-05-19 出版日期:2025-09-25 发布日期:2025-10-13
  • 作者简介:李兆博(1980—),男,高级工程师,硕士研究生,主要研究方向为钽、铌及其合金制品、靶材的加工工艺、组织和性能,E-mail:ajwmxl@163.com。
  • 基金资助:
    宁夏自然科学基金创新群体项目(2022AAC01003);中国有色集团青年科技专项(2023KJZX017)

Microstructure and texture evolution along the thickness direction of high-purity tantalum during circumferential rolling process

Li Zhaobo1,2, Wang Kai2, Fang Fang1,2, Qi Meng3, Ge Dongliang3, Liang Gaojie3, Wang Aijuan3   

  1. 1. Ningxia Orient Tantalum Industry Co., Ltd., Shizuishan Ningxia 753000, China;
    2. State Key Laboratory of Rare Metal Special Materials, Northwest Rare Metal Material Research Institute Ningxia Co., Ltd., Shizuishan Ningxia 753000, China;
    3. School of Materials Science and Engineering, Xi'an University of Technology, Xi'an Shaanxi 710048, China
  • Received:2025-03-08 Revised:2025-05-19 Online:2025-09-25 Published:2025-10-13

摘要: 对金属钽进行90%大变形量的周向轧制,利用电子背散射衍射(EBSD)、透射电镜(TEM)对轧制钽样品沿厚度方向的织构、储存能及位错分布进行了表征。结果表明,轧制钽主要为{111}和{001}织构,两者沿样品厚度方向交替排列,形成强烈的织构梯度,且{111}织构密度大于{001}织构密度。轧制钽材沿厚度方向变形储存能分布不均匀且存在强烈的取向依赖性,{111}织构的储存能比{001}织构的储存能多。几何必需位错(GNDs)密度在不同织构中分布不均,{111}织构的KAM值更高,其GNDs密度更大,对应{111}织构密度较大。

关键词: 高纯钽, 周向轧制, 织构, 位错

Abstract: Tantalum metal was subjected to 90% large deformation through circumferential rolling. The texture, stored energy, and dislocation distribution along the thickness direction of the rolled tantalum specimen were characterized using electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). The results show that the rolled tantalum mainly exhibits {111} and {001} textures, which alternately arrange along the thickness direction, forming a strong texture gradient,with the density of the {111} texture being higher than that of the {001} texture. The deformation stored energy distribution along the thickness direction of the rolled tantalum is non-uniform and exhibits strong orientation dependence, with the {111} texture having higher stored energy than the {001} texture. The distribution of geometrically necessary dislocations (GNDs) density is uneven in different textures, with the {111} texture having higher KAM values and greater GNDs density, corresponding to the higher density of the {111} texture.

Key words: high-purity tantalum, circumferential rolling, texture, dislocation

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