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鋁含量和退火溫度對(duì)鋯鋁合金相組成和力學(xué)性能的影響
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國家重點(diǎn)基礎(chǔ)研究發(fā)展規(guī)劃(“973”計(jì)劃)(2010CB731600)；河北省博士后科研項(xiàng)目擇優(yōu)資助


Effect of Al Content and Annealing Temperature on Phase Compositions and Mechanical Properties of ZrAl Alloys
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    摘要:

    利用非自耗電弧爐熔煉了Al含量為6.0%，7.0%，8.0%(質(zhì)量分?jǐn)?shù))的鋯鋁二元合金，通過退火過程中的包析反應(yīng)得到了不同相組成的Zr3Al基合金，借助光學(xué)顯微鏡、XRD分析研究了合金的金相組織和相組成，進(jìn)行了顯微硬度測(cè)定和拉伸試驗(yàn)。結(jié)果表明：鑄態(tài)的鋯鋁合金顯微硬度隨著鋁含量的增加而增大；退火可得到組織均勻的Zr3Al基合金，其顯微硬度和抗拉強(qiáng)度主要與相組成和基體晶粒大小有關(guān)，而與第二相的形態(tài)無關(guān)；合金的顯微硬度、抗拉強(qiáng)度隨著Zr3Al相的增多而增大，延伸率隨著Zr3Al相的增多而減小；合金的顯微硬度、抗拉強(qiáng)度和延伸率隨著Zr3Al晶粒的細(xì)化而不同程度地增大

    Abstract:

    ZrAl alloys with three different Al contents (6.0, 7.0, 8.0, wt%) were melted by the non-consumable electric-arc furnace. Zr3Al-based alloys with different phase compositions were obtained by peritectoid reaction during the annealing process. Microstructures and phase compositions of alloys was studied by optical microscope and XRD, and then its microhardnesses and tensile properties were tested. The results show that the microhardness of as-cast ZrAl alloys increases with the increase of Al content. Homogeneous microstructure of Zr3Al-based alloys can be obtained by annealing. Its microhardness and tensile strength are relative to matrix grain size and phase composition, but independent of the form and distribution of the second phases. Microhardness and tensile strength of the annealed alloy increase with the increase of Zr3Al content, while the elongation decreases. In addition, microhardness, tensile strength and elongation of the annealed alloys increase with Zr3Al grain refinement

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李建輝,毛 磊,張福成,王 琦,國 棟,馬 靜,李 強(qiáng).鋁含量和退火溫度對(duì)鋯鋁合金相組成和力學(xué)性能的影響[J].稀有金屬材料與工程,2014,43(9):2227~2231.[Li Jianhui, Mao Lei, Zhang Fucheng, Wang Qi, Guo Dong, Ma Jing, Li Qiang. Effect of Al Content and Annealing Temperature on Phase Compositions and Mechanical Properties of ZrAl Alloys[J]. Rare Metal Materials and Engineering,2014,43(9):2227~2231.]
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  • 收稿日期:2013-09-21
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  • 在線發(fā)布日期: 2015-02-25
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