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Mg-5Y-0.5Ce-0.5Zr合金的熱壓縮行為
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河南科技大學(xué) 材料科學(xué)與工程學(xué)院

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國家自然科學(xué)基金項目(U1404501)


Hot compression behavior of Mg-5Y-0.5Ce-0.5Zr alloy
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School of Materials Science and Engineering,Henan University of Science and Technology

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    摘要:

    在變形溫度為300~450 oC、應(yīng)變速率為0.01~1 s-1的條件下進行熱壓縮試驗,對Mg-5Y-0.5Ce-0.5Zr鎂合金的熱變形行為進行了研究。結(jié)果表明,在熱壓縮變形過程中,該合金的流變應(yīng)力隨著變形溫度和應(yīng)變速率的變化而變化。在同一應(yīng)變速率下,流變應(yīng)力隨著變形溫度的增高而降低;在同一變形溫度下,流變應(yīng)力隨著應(yīng)變速率的減小而減小。該合金熱壓縮流變應(yīng)力的本構(gòu)方程可采用雙曲正弦形式構(gòu)建,熱變形激活能Q為253 kJ/mol。

    Abstract:

    The hot deformation behavior of Mg-5Y-0.5Ce-0.5Zr magnesium alloy was studied by means of hot compression tests at deformation temperatures from 300 oC to 450 oC and strain rates from 0.01 s-1 to 1 s-1. The results showed that the flow stress of the alloy is changed with deformation temperature and strain rate during the hot compression deformation. The flow stress of the alloy decreases with increasing deformation temperature at the same strain rate, and decreases with decreasing strain rate at the same deformation temperature. The constitutive equation for hot compression flow stress of the alloy is established in a hyperbolic-sine form. The hot deformation activation energy Q of the alloy is 253 kJ/mol.

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張 清,朱利敏,李全安. Mg-5Y-0.5Ce-0.5Zr合金的熱壓縮行為[J].稀有金屬材料與工程,2020,49(9):2973~2977.[Zhang Qing, Zhu Limin, Li Quan-an. Hot compression behavior of Mg-5Y-0.5Ce-0.5Zr alloy[J]. Rare Metal Materials and Engineering,2020,49(9):2973~2977.]
DOI:10.12442/j. issn.1002-185X.20190564

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  • 收稿日期:2019-07-04
  • 最后修改日期:2019-08-29
  • 錄用日期:2019-09-06
  • 在線發(fā)布日期: 2020-10-15
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