3Zn6Y準(zhǔn)晶相,并使合金組織得到明顯地細(xì)化；組織中β-Mg17Al12相的數(shù)量減少,且形貌由粗大連續(xù)網(wǎng)狀向斷續(xù)條狀及顆粒狀轉(zhuǎn)變。其中,當(dāng)MZY準(zhǔn)晶加入量為6%時(shí),合金組織最為細(xì)小,合金的抗拉強(qiáng)度、屈服強(qiáng)度及伸長(zhǎng)率達(dá)到峰值,分別為202.92MPa、100.57MPa和10.8%,其比AM50合金分別提高了24.59%、74.9%和66.15%。外加MZY準(zhǔn)晶改善AM50合金力學(xué)性能的原因可歸結(jié)于組織細(xì)化、β-Mg17Al12相數(shù)量及形貌的改善、以及與鎂合金基體具有良好潤(rùn)濕性的準(zhǔn)晶相的彌散強(qiáng)化作用。"/>

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鎂基準(zhǔn)晶對(duì)AM50合金組織與性能的影響
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沈陽(yáng)工業(yè)大學(xué),沈陽(yáng)工業(yè)大學(xué),沈陽(yáng)工業(yè)大學(xué),沈陽(yáng)工業(yè)大學(xué),沈陽(yáng)工業(yè)大學(xué)

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TG146.2

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國(guó)家自然科學(xué)基金(51504153),國(guó)家自然科學(xué)基金(51571145),遼寧省自然科學(xué)基金(201602548)


Effect of Mg-Based Quasicrystals Addition on Microstructure and Mechanical Properties of AM50 Magnesium Alloy
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Shenyang University of Technology,Shenyang University of Technology,Shenyang University of Technology,Shenyang University of Technology,Shenyang University of Technology

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    摘要:

    通過普通凝固方法制備含高體積分?jǐn)?shù)準(zhǔn)晶相的Mg-48Zn-13Y準(zhǔn)晶中間合金。利用OM,SEM,EDS,XRD及拉伸實(shí)驗(yàn)研究了MZY準(zhǔn)晶對(duì)AM50合金顯微組織及力學(xué)性能的影響。結(jié)果表明：向AM50合金中添加MZY準(zhǔn)晶后,組織中可保留Mg3Zn6Y準(zhǔn)晶相,并使合金組織得到明顯地細(xì)化；組織中β-Mg17Al12相的數(shù)量減少,且形貌由粗大連續(xù)網(wǎng)狀向斷續(xù)條狀及顆粒狀轉(zhuǎn)變。其中,當(dāng)MZY準(zhǔn)晶加入量為6%時(shí),合金組織最為細(xì)小,合金的抗拉強(qiáng)度、屈服強(qiáng)度及伸長(zhǎng)率達(dá)到峰值,分別為202.92MPa、100.57MPa和10.8%,其比AM50合金分別提高了24.59%、74.9%和66.15%。外加MZY準(zhǔn)晶改善AM50合金力學(xué)性能的原因可歸結(jié)于組織細(xì)化、β-Mg17Al12相數(shù)量及形貌的改善、以及與鎂合金基體具有良好潤(rùn)濕性的準(zhǔn)晶相的彌散強(qiáng)化作用。

    Abstract:

    The Mg-48Zn-13Y quasicrystal master alloy with high volume fraction of the quasicrystalline phase was prepared by conventional solidification method. The influences of the MZY quasicrystal on microstructures and properties of AM50 alloys were investigated by OM, SEM, EDS, XRD and tensile tests. The results indicated that addition of the MZY quasicrystal to AM50 alloy, the Mg3Zn6Y quasicrystal phase could be left well in AM50 matrix alloy, and the microstructures were obviously refined. The β phase in the microstructures was changed from coarse and continuous to discontinuous strip and granular, and the amount was decreased. When the content of the MZY quasicrystal is up to 6%, the microstructure was greatly refined, and the ultimate tensile strength, yield strength and elongation of the alloy reached to the maximum, 206.63 MPa, 92.50 MPa and 10.04%, respectively. Compared with AM50 alloy, it is improved by 24.59%, 74.9% and 66.15%, respectively. Mechanical properties of AM50 magnesium alloy can be improved significantly by addition of the MZY quasicrystal, which results from the microstructure refinement, the optimization of the morphology and amount of the β phase and the dispersion strengthening effect of the quasicrystal phase has good wettability with the magnesium alloy substrate.

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馬德志,王 峰,王 志,劉 正,毛萍莉.鎂基準(zhǔn)晶對(duì)AM50合金組織與性能的影響[J].稀有金屬材料與工程,2018,47(7):2166~2171.[Ma Dezhi, Wang Feng, Wang Zhi, Liu Zheng, Mao Pingli. Effect of Mg-Based Quasicrystals Addition on Microstructure and Mechanical Properties of AM50 Magnesium Alloy[J]. Rare Metal Materials and Engineering,2018,47(7):2166~2171.]
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  • 收稿日期:2016-07-26
  • 最后修改日期:2016-11-11
  • 錄用日期:2016-12-02
  • 在線發(fā)布日期: 2018-10-10
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