17Al12相和Al2Y相構(gòu)成。此外,微量Y添加可顯著細化AZ42合金的組織并改善網(wǎng)狀β相分布,從而提高合金的力學與耐腐蝕性能；其中,當Y添加量為0.5%時可獲得最佳綜合性能。"/>

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快速凝固對微量Y添加Mg-4Al-2Zn合金顯微組織,壓縮性能及腐蝕行為的研究
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河北工業(yè)大學 材料科學與工程學院

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中圖分類號:

TG146.2

基金項目:

國家自然科學基金(51701060),河北省自然科學基金優(yōu)秀青年科學基金(E2016202130),河北省教育廳高等學?？茖W研究計劃項目(QN2015035),河北工業(yè)大學優(yōu)秀青年科技創(chuàng)新基金(2015002),國家外專局高端外國專家項目(GDW20171300102)


Effects of rapid solidification on the microstructural evolution, mechanical properties and corrosion behavior of Mg-4Al-2Zn alloys with various Y addition
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School of Materials Science and Engineering, Hebei University of Technology

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    摘要:

    本文通過常規(guī)鑄造與快速凝固法成功制得兩類Mg-4Al-2Zn-xY(AZ42,x: 0.5, 1.0 wt.%)鎂合金,并系統(tǒng)研究了快速凝固對微量Y添加后AZ42合金組織和性能的影響。研究結(jié)果表明,快速凝固工藝較傳統(tǒng)鑄造相比可顯著細化AZ42合金的微觀組織并提高合金的力學性能和耐腐蝕特性。AZ42合金加入Y元素后組織主要由α-Mg基體、β-Mg17Al12相和Al2Y相構(gòu)成。此外,微量Y添加可顯著細化AZ42合金的組織并改善網(wǎng)狀β相分布,從而提高合金的力學與耐腐蝕性能；其中,當Y添加量為0.5%時可獲得最佳綜合性能。

    Abstract:

    In present work, two kinds of Mg-4Al-2Zn alloy (AZ42) with minor addition of Y elements (0.5, 1.0 wt.%) were succesfully fabricated by gravity casting and rapid solidifaication process, respectively. In addition, microstructure, mechanical properties and corrosion behavior of AZ42 alloys with Y addition were systemetically investigated. The results show that rapid solidification technique can significantly refine the microstructure of AZ42 alloys containing Y and improve related mechanical properties and corrosion resistance compared with the traditional casting counterparts. The microstructure of Y-bearing AZ42 alloy is mainly composed of α-Mg matrix, β-Mg17Al12 phase and Al2Y phase. Moreover, the addition of Y in AZ42 alloy resulted in grain refinmenent and enhancement of both mechancial and corroison properties, which maybe attributed to fine grain size and distribution modification of β-phase. And the optimum amount of Y element in AZ42 alloy is determined to be 0.5 wt.%.

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李其智,余 暉,王志峰,王岳宸,孟帥舉,肖海濤,趙維民.快速凝固對微量Y添加Mg-4Al-2Zn合金顯微組織,壓縮性能及腐蝕行為的研究[J].稀有金屬材料與工程,2019,47(3):1001~1007.[Li Qizhi, Yu Hui, Wang Zhifeng, Wang Yuechen, Meng Shuaiju, Xiao Haitao, Zhao Weimin. Effects of rapid solidification on the microstructural evolution, mechanical properties and corrosion behavior of Mg-4Al-2Zn alloys with various Y addition[J]. Rare Metal Materials and Engineering,2019,47(3):1001~1007.]
DOI：10.12442/j. issn.1002-185X.20170758

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  • 收稿日期:2017-08-25
  • 最后修改日期:2017-10-18
  • 錄用日期:2017-11-09
  • 在線發(fā)布日期: 2019-04-10
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