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預(yù)變形對Ni-Mn-Ga合金馬氏體相變的影響
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TG146.15 TG111.5

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國家自然科學(xué)基金資助(5013010)


Effect of Pre-deformation Strain on Martensitic Transformation of Ni-Mn-Ga Alloy
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    摘要:

    研究了形變對Ni-Mn-Ga合金馬氏體相變及其組織形態(tài)的影響，并應(yīng)用馬氏體相變熱力學(xué)和動力學(xué)探討了適當(dāng)塑性變形后馬氏體相變滯后得以大幅度提高的微觀本質(zhì)。結(jié)果表明，隨著應(yīng)變量的增加，馬氏體相變溫度幾乎保持不變，而其逆相變溫度則迅速升高，塑性應(yīng)變導(dǎo)致儲存在界面處的彈性應(yīng)變能的釋放是塑性變形提高合金相變滯后的主導(dǎo)因素。

    Abstract:

    Using DSC, TEM and compress test, the effect of deformation on martensitic transformation and microstructure of the Ni-Mn-Ga alloy has been investigated. The mechanism of increase of martensitic transformation hysteresis after optimum plastic deformation has been discussed by thermodynamics and kinetics of martensitic transformation. The results show that the martensitic transformation temperatures keep constant, but reverse transformation temperatures sharply increase with an increase of the pre-deformation strain. The increase of transformation hysteresis in the alloy is mainly due to the release of the elastic energy deposited at the boundary induced by the plastic deformation.

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高智勇 蔡偉 趙連城 王文洪 吳光恒 詹文山 沈保根.預(yù)變形對Ni-Mn-Ga合金馬氏體相變的影響[J].稀有金屬材料與工程,2004,33(3):254~257.[Gao Zhiyong, Cai Wei, Zhao Liancheng, Wang Wenhong, Wu Guangheng, Zhan Wenshan, Shen Baogen. Effect of Pre-deformation Strain on Martensitic Transformation of Ni-Mn-Ga Alloy[J]. Rare Metal Materials and Engineering,2004,33(3):254~257.]
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  • 最后修改日期:2002-09-16
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