特殊晶界。通過(guò)分析得知這種晶界形成的原因與FCC結(jié)構(gòu)的晶粒中的∑3晶界的形成原因不同，是由FCC→HCP馬氏體相變導(dǎo)致，即為相變孿晶。"/>

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多晶純鈷退火組織中的孿晶轉(zhuǎn)變規(guī)律研究
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重慶大學(xué),重慶大學(xué),重慶大學(xué),重慶大學(xué),重慶大學(xué)

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國(guó)家自然科學(xué)基金(51271208,51071183,50890170)資助


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:

    本文主要是結(jié)合X射線衍射（XRD）技術(shù)以及電子背散射衍射（EBSD）技術(shù)，對(duì)不同退火溫度下的多晶純鈷的退火組織的變化規(guī)律展開(kāi)研究。研究結(jié)果表明：殘留的多晶純鈷面心立方（FCC）結(jié)構(gòu)的晶粒內(nèi)部在退火過(guò)程中形成了∑3孿晶界，而且具有這種特征的晶粒數(shù)量隨退火溫度改變不大，基本趨于穩(wěn)定；同時(shí)，具有密排六方（HCP）結(jié)構(gòu)的晶粒內(nèi)部在退火過(guò)程中形成大量的71.4°/<11﹣20>特殊晶界。通過(guò)分析得知這種晶界形成的原因與FCC結(jié)構(gòu)的晶粒中的∑3晶界的形成原因不同，是由FCC→HCP馬氏體相變導(dǎo)致，即為相變孿晶。

    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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晉家兵,張喜燕,陳建華,朱玉濤,劉慶.多晶純鈷退火組織中的孿晶轉(zhuǎn)變規(guī)律研究[J].稀有金屬材料與工程,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
  • 錄用日期:2014-07-28
  • 在線發(fā)布日期: 2016-07-19
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