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Mo-La2O3板材室溫拉伸變形與斷裂研究
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TG146.2

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國(guó)家"973"計(jì)劃項(xiàng)目(1998061316);北京市科技新星計(jì)劃項(xiàng)目資助(952872200)


Deformation and Fracture Behaviour of Annealed Mo-La2O3 Sheets by Ambient Tension
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    摘要:

    采用粉末冶金和壓力加工方法制備了不同La2O3含量Mo-La2O3板材。Mo-La2O3板材和純鋁(PMo)板材經(jīng)高溫?zé)崽幚砗笤谑覝叵逻M(jìn)行靜態(tài)拉伸試驗(yàn)。結(jié)果表明，La2O3的添加不僅提高了鋁板的強(qiáng)度，而且對(duì)鋁板的延性具有顯著的改善作用，Mo-La2O3板材的縱向塑性在20％以上，最高達(dá)到46％。采用SEM和TEM的觀察結(jié)果對(duì)鋁板的拉伸行為進(jìn)行了解釋。

    Abstract:

    The molybdenum sheets doped with different contents of La2O3 (Mo-La2O3) were prepared by powder metallurgy and processing technology. Then their mechanical properties were tested by use of tension at room temperature with different velocity and their microstructures were discussed by means of SEM, TEM and XRD. It is shown that both the strength and ductility of molybdenum sheets are greatly improved by addition of La2O3. The maximum elongation of annealed Mo- La2O3 sheets is up to 46%. The experimental results can be reasonably explained by the interaction of La2O3 particles and dislocation as well as the toughening of second phase La2O3 .

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張久興 劉燕琴 周美玲 劉丹敏 左鐵鏞. Mo-La2O3板材室溫拉伸變形與斷裂研究[J].稀有金屬材料與工程,2005,34(2):221~225.[Zhang Jiuxing, Liu Yanqing, Zhou Meiling, Liu Danmin, Zuo Tieyong. Deformation and Fracture Behaviour of Annealed Mo-La2O3 Sheets by Ambient Tension[J]. Rare Metal Materials and Engineering,2005,34(2):221~225.]
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  • 最后修改日期:2003-06-10
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