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鎂合金板材的微觀組織演變及腐蝕行為
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重慶市科學(xué)技術(shù)研究院,重慶市科學(xué)技術(shù)研究院,重慶市科學(xué)技術(shù)研究院,重慶市科學(xué)技術(shù)研究院

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國(guó)家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）


Microstructure evolution and corrosion performance of magnesium alloy sheets
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Chongqing Academy of Science and Technology

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    摘要:

    本研究在室溫下對(duì)AZ31鎂合金板材分別沿與擠壓方向成0o, 30o, 45o, 60o和90o五個(gè)方向進(jìn)行了預(yù)拉伸變形，之后研究了其微觀結(jié)構(gòu)和預(yù)變形后板材的腐蝕性能。結(jié)果表明，隨著角度的增加，孿晶數(shù)量也隨之增加，孿晶量多的鎂合金板材（～52%）具有較好的抗腐蝕性。這主要是因?yàn)槔鞂\晶引入的更多晶界，使合金的微觀結(jié)構(gòu)更為均勻，從而可以抑制腐蝕行為產(chǎn)生。

    Abstract:

    AZ31 Mg alloy sheets were processed by pre-stretched (PRS) at the angles of 0o, 30o, 45o, 60o and 90o between the tensile direction and the extrusion direction at room temperature. Twinning was thus introduced and gradually increased. The corrosion performance of the twinned Mg alloy sheets was sensitive to the area fraction of twins. Meanwhile, the sheet processing most area fraction of twins (～52%) exhibited the best corrosion resistance. This was attributed to the subdivision of grains by introducing extension twin boundaries. Twinning brought about more grain boundaries that acted as a corrosion barrier and thus improved the corrosion resistance. The microstructure evolutions and corrosion behavior were examined and compared.

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楊青山,楊青山.鎂合金板材的微觀組織演變及腐蝕行為[J].稀有金屬材料與工程,2016,45(7):1674~1677.[yangqingshan, yangqingshan. Microstructure evolution and corrosion performance of magnesium alloy sheets[J]. Rare Metal Materials and Engineering,2016,45(7):1674~1677.]
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  • 收稿日期:2014-05-22
  • 最后修改日期:2014-09-19
  • 錄用日期:2014-10-30
  • 在線發(fā)布日期: 2016-10-09
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