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Sm對(duì)Mg-6Al-1.2Y-0.9Nd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(yáng)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 Sm 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Sm對(duì)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，合金中加入Sm后，Sm優(yōu)先與A1形成高熔點(diǎn)Al2Sm彌散顆粒質(zhì)點(diǎn)，當(dāng)Sm含量(1.5%~2.0%)較高時(shí)，合金內(nèi)出現(xiàn)針狀Mg12Nd相。在研究范圍內(nèi)，隨Sm含量的增加，合金的常溫和高溫力學(xué)性能略有升高然后降低；而合金的延伸率呈現(xiàn)不斷降低的趨勢(shì)。合金的拉伸斷口為具有塑性特征的準(zhǔn)解理斷裂。

    Abstract:

    Microstructures and mechanical properties of Mg-6Al-1.2Y-0.9Nd magnesium alloy with Sm addition were investigated through OM, SEM, EDS and XRD. The results show that Sm combines firstly with Al to form dispersed, high-melting-point particles which are mainly Al2Sm phase. When the mass fraction of Sm is high from 1.5% to 2.0%, the acicular Mg12Nd phase appears in the alloy. With the increase of Sm content within the range from 0 to 2.0%, the tensile strength of alloys at ambient and elevated temperature firstly increases slightly, and then decreases; while the elongation decreases continuously. The tensile fracture of the alloy is quasi-cleavage failure with plastic characteristic.

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李克杰,李全安,井曉天,陳 君,張興淵,張 清. Sm對(duì)Mg-6Al-1.2Y-0.9Nd合金組織和性能的影響[J].稀有金屬材料與工程,2010,39(1):96~100.[Li Kejie, Li Quanan, Jing Xiaotian, Chen Jun, Zhang Xingyuan, Zhang Qing. Effects of Sm on Microstructures and Mechanical Properties of Mg-6Al-1.2Y-0.9Nd Alloys[J]. Rare Metal Materials and Engineering,2010,39(1):96~100.]
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  • 收稿日期:2009-01-03
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