+高级检索
冷却介质对商业纯钛 βα 相转变组织及织构的影响
作者:
作者单位:

1.重庆大学 材料科学与工程学院 国际轻合金联合实验室(MOE),重庆 400044;2.攀钢研究院,四川 成都 610031

作者简介:

通讯作者:

中图分类号:

基金项目:

National Natural Science Foundation of China (51421001); Fundamental Research Funds for the Central Universities (2020CDJDPT001)


Influence of Different Cooling Mediums on βα Phase Transformation Microstructure and Texture in Commercially Pure Ti
Author:
Affiliation:

1.International Joint Laboratory for Light Alloys (Ministry of Education), College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;2.Panzhihua Iron and Steel Research Institute, Chengdu 610031, China

Fund Project:

National Natural Science Foundation of China (51421001); Fundamental Research Funds for the Central Universities (2020CDJDPT001)

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    利用OM、ECC、EBSD、TEM等表征技术和显微硬度实验研究了经β固溶处理的商业纯钛板材在βα相变过程中不同冷却介质对其组织演变、变体选择、织构遗传及力学性能的影响。结果表明:随着冷却速率的降低,相变组织依次呈细针状α′马氏体(水冷和液氮冷)、Widmanst?tten组织(空冷)及粗大晶粒(炉冷),且冷却速率越快,则转变组织越细,进而其硬度值越高。在βα冷却过程中,只有炉冷条件下由于出现了部分不满足Burgers关系的取向,导致其并不严格遵循Burgers取向关系。与原始组织相比,水冷和液氮冷条件下由于出现新的织构成分(<0001>//TD、<110>//ND),导致其织构分布更分散;炉冷条件下由于发生了强烈变体选择而出现织构遗传现象,导致更强的相变织构。因此可以通过提高冷却速率来抑制变体选择,进而弱化相变织构。

    Abstract:

    The effect of cooling medium on microstructure evolution, variant selection and texture inheritance along with mechanical properties in a recrystallized commercially pure Ti sheet after β-solution treatment was investigated by combined use of optical microscopy (OM), electron channeling contrast (ECC) imaging, electron backscatter diffraction (EBSD) techniques, transmission electron microscopy (TEM) and micro-hardness test. It is found that with the decrease of cooling rate, fine needle-like α′ martensite (in water and liquid nitrogen), Widmanst?tten (in air), and coarse-grain microstructures (in furnace) are observed in turn. Additionally, the faster cooling rate results in a finer transformed structure accompanied with an attendant higher hardness value. Analyses for crystallographic orientations reveal that the Burgers orientation relationship (BOR) is strictly obeyed during the βα cooling except for the β-furnace-cooled specimen with appearance of other misorientations disobeying the BOR. As for texture characteristics, firstly, the texture distribution is largely scattered compared with the initial one and new orientation components of <0001>//TD and <>//ND appear upon the water and liquid nitrogen quenching. Secondly, the texture inheritance phenomenon occurs in furnace cooling condition because of stronger variant selection, then leading to a stronger transformation texture. Results suggest that raising cooling rates can be more feasible to weaken the transformation texture by suppressing the variant selection.

    参考文献
    相似文献
    引证文献
引用本文

杨晓玲,王莹,彭琳,李军,栾佰峰.冷却介质对商业纯钛 βα 相转变组织及织构的影响[J].稀有金属材料与工程,2022,51(6):1957~1963.[Yang Xiaoling, Wang Ying, Peng Lin, Li Jun, Luan Baifeng. Influence of Different Cooling Mediums on βα Phase Transformation Microstructure and Texture in Commercially Pure Ti[J]. Rare Metal Materials and Engineering,2022,51(6):1957~1963.]
DOI:10.12442/j. issn.1002-185X.20210316

复制
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2021-04-12
  • 最后修改日期:2021-06-23
  • 录用日期:2021-07-09
  • 在线发布日期: 2022-06-29
  • 出版日期: 2022-06-29