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Sn對Mg-6Al-1.2Y-0.9Nd鎂合金組織和性能的影響
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河南省杰出人才計(jì)劃（084200510018）；洛陽市科技攻關(guān)項(xiàng)目（0602018A）；河南科技大學(xué)重大預(yù)研專項(xiàng)（2007ZD002）


Effects of Sn on Microstructures and Mechanical Properties of Mg-6Al-1.2Y-0.9Nd Alloys
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    摘要:

    采用XRD、OM、SEM和EDS等手段研究Sn對Mg-6Al-1.2Y-0.9Nd合金微觀組織和力學(xué)性能的影響。結(jié)果表明， Sn可以顯著提高合金從室溫到175 ℃區(qū)間的抗拉強(qiáng)度，當(dāng)Sn含量為1%時(shí)，鎂合金在室溫和175 ℃時(shí)抗拉強(qiáng)度達(dá)到最大值，分別為242和192 MPa，合全的拉伸斷口為具有塑性特征的準(zhǔn)解理斷裂。 Sn的加入使合金的顯微組織得到明顯細(xì)化，并出現(xiàn)高熔點(diǎn)Mg2Sn合金相。合金力學(xué)性能的提高主要是由于細(xì)晶強(qiáng)化、彌散強(qiáng)化和固溶強(qiáng)化。

    Abstract:

    Microstructures and mechanical properties of Mg-6Al-1.2Y-0.9Nd magnesium alloy with Sn addition were investigated by OM, SEM, EDS and XRD. The results show the addition of Sn can dramatically enhance the tensile strength of the alloy in the temperature range of 25-175 oC. When the content of Sn is up to 1%, the values of tensile strength of the alloy at room temperature and 175 oC are up to their maximums simultaneously, 242 MPa and 192 MPa, respectively. The fracture of the alloy is quasi-cleavage failure with plastic characteristic. It can be found that the grain of alloy is obviously refined with the addition of Sn. The high-melting phases Mg2Sn is found in the alloy with the addition of Sn. Sn can improve the mechanical properties of Mg-6Al-1.2Y-0.9Nd alloy because of the grain?refining?strengthening, solution strengthening and dispersion strengthening.

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陳 君,李全安,李克杰,李肖豐,張興淵,張 清. Sn對Mg-6Al-1.2Y-0.9Nd鎂合金組織和性能的影響[J].稀有金屬材料與工程,2010,39(7):1180~1184.[Chen Jun, Li Quanan, Li Kejie, Li Xiaofeng, Zhang Xingyuan, Zhang Qing. Effects of Sn on Microstructures and Mechanical Properties of Mg-6Al-1.2Y-0.9Nd Alloys[J]. Rare Metal Materials and Engineering,2010,39(7):1180~1184.]
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  • 收稿日期:2009-08-19
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