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高純鈦壓縮孿生行為研究
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重慶大學(xué),重慶大學(xué),重慶大學(xué),重慶大學(xué)

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國(guó)家自然科學(xué)基金資助(項(xiàng)目號(hào)51271208、 51421001)


Study of Compressive Twinning Behavior in High-purity Titanium
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Chongqing University,,,

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    摘要:

    利用背散射電子衍射(EBSD)技術(shù)對(duì)高純鈦形變組織中{11-22}和{11-24}壓縮孿生進(jìn)行了研究。結(jié)果表明：{11-24}孿晶總是伴隨{11-22}孿晶在同一晶粒中產(chǎn)生,在變形組織中沒(méi)有發(fā)現(xiàn)單獨(dú)存在的{11-24}孿晶；這種極少出現(xiàn)的{11-24}壓縮孿晶主要由{11-22}孿晶與晶界或{11-22}孿生變體之間交互作用改變了局部應(yīng)力狀態(tài)而誘發(fā)的。由{11-22}孿晶誘發(fā)的{11-24}孿晶更傾向于同其中一個(gè){11-22}孿生變體具有相同的轉(zhuǎn)軸。此外,根據(jù)晶體對(duì)稱性及相同晶粒中{11-22}和{11-24}孿晶之間的取向關(guān)系,{11-22}-{11-24}孿晶反應(yīng)可形成四種不同類型的孿晶反應(yīng)界面。

    Abstract:

    Compressive twinning behavior in high-purity titanium was studied by electrical back-scattered diffraction (EBSD) techniques. The results show that {11-24} twins are always accompanied with {11-22} twins in some specific grains, and individual {11-24} twin is not observed in microstructure of the deformed sample. The formation of {11-24} twin is attributed to the changes of local stress states, which induced by the {11-22}-{11-22} twin variants interactions or {11-22} twin interactes with the grain boundaries. The {11-22} and {11-24} twins tend to share a common rotation axis with one of the {11-22} twin variant within an initial grain. In addition, due to the crystal symmetry and the orientation relationships between {11-22} and {11-24} twins, interactions between {11-22} and {11-24} twins inevitably occur, which results in four different types of {11-22}-{11-24} twin junctions.

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任 毅,張喜燕,孫 奇,劉 慶.高純鈦壓縮孿生行為研究[J].稀有金屬材料與工程,2018,47(7):2061~2066.[Ren Yi, Zhang Xiyan, Sun Qi, Liu Qing. Study of Compressive Twinning Behavior in High-purity Titanium[J]. Rare Metal Materials and Engineering,2018,47(7):2061~2066.]
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  • 收稿日期:2016-09-02
  • 最后修改日期:2016-12-28
  • 錄用日期:2017-02-21
  • 在線發(fā)布日期: 2018-10-10
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