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多晶纯钴退火组织中的孪晶转变规律研究
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重庆大学,重庆大学,重庆大学,重庆大学,重庆大学

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国家自然科学基金(51271208,51071183,50890170)资助


Research annealed polycrystalline pure cobalt twinning organization change laws
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Chongqing University,Chongqing University,Chongqing University,Chongqing University,chongqing university

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    摘要:

    本文主要是结合X射线衍射(XRD)技术以及电子背散射衍射(EBSD)技术,对不同退火温度下的多晶纯钴的退火组织的变化规律展开研究。研究结果表明:残留的多晶纯钴面心立方(FCC)结构的晶粒内部在退火过程中形成了∑3孪晶界,而且具有这种特征的晶粒数量随退火温度改变不大,基本趋于稳定;同时,具有密排六方(HCP)结构的晶粒内部在退火过程中形成大量的71.4°/<11﹣20>特殊晶界。通过分析得知这种晶界形成的原因与FCC结构的晶粒中的∑3晶界的形成原因不同,是由FCC→HCP马氏体相变导致,即为相变孪晶。

    Abstract:

    This paper is the use of X-ray diffraction (XRD) techniques and electron backscatter diffraction (EBSD) technique to research the variation of polycrystalline pure cobalt tissue which is annealed at different temperatures. The results showed that:∑3 twin boundaries were observed in the retained FCC phase and we also find the number of grains having such a characteristic is not changed with annealing temperature, basically stable. Meanwhile, having a hexagonal close-packed (HCP) structure formed large grains of 71.4°/<11﹣20> special boundaries during the annealing process. Through analysis showed that the reasons and causes the formation of 71.4°/<11﹣20> special boundaries are not the same as the ∑3 twin boundaries which were formed in the retained FCC phase; 71.4°/<11﹣20> is formed as a result of phase transformation from FCC to HCP, following the Shoji-Nishiyama orientation relationship.

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晋家兵,张喜燕,陈建华,朱玉涛,刘庆.多晶纯钴退火组织中的孪晶转变规律研究[J].稀有金属材料与工程,2016,45(2):353~357.[Jin Jiabing, Zhang Xiyan, Chen Jianhua, Zhu Yutao, liuqing. Research annealed polycrystalline pure cobalt twinning organization change laws[J]. Rare Metal Materials and Engineering,2016,45(2):353~357.]
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  • 收稿日期:2014-03-05
  • 最后修改日期:2014-06-10
  • 录用日期:2014-07-28
  • 在线发布日期: 2016-07-19
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