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Effect of Casting Temperature on Mechanical Properties and Microstructure of Zr53.9Cu29.4Ni4.9Al9.8Fe2 Bulk Metallic Glass
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Effect of Casting Temperature on Mechanical Properties and Microstructure of Zr53.9Cu29.4Ni4.9Al9.8Fe2 Bulk Metallic Glass
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National Natural Science Foundation of China (50371016)

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    摘要:

    在水冷銅坩堝中采用銅模吸鑄法以不同的鑄造溫度制備出直徑3 mm的Zr53.9Cu29.4Ni4.9Al9.8Fe2合金試樣，研究了鑄造溫度對(duì)鋯基塊體金屬玻璃力學(xué)性能和組織的影響。研究結(jié)果表明，對(duì)于試樣的非晶結(jié)構(gòu)，存在一個(gè)臨界鑄造溫度，低于此溫度會(huì)有晶體相析出。在一定范圍內(nèi)提高鑄造溫度可以提高鋯基塊體金屬玻璃的壓縮斷裂強(qiáng)度和輕微降低塑性。當(dāng)鑄造電壓升高至9 kV時(shí)，不但可以提高合金試樣的壓縮斷裂強(qiáng)度，同時(shí)提高其塑性，其塑性達(dá)到2.62%。通過(guò)控制與自由體積和殘余應(yīng)力相關(guān)的鑄造溫度，可以調(diào)節(jié)鋯基塊體金屬玻璃的力學(xué)性能。

    Abstract:

    Zr53.9Cu29.4Ni4.9Al9.8Fe2 alloy sample with the diameter of 3 mm was prepared by Cu mold suction casting at different temperatures. The effect of casting temperature on mechanical properties and microstructure of the as-cast alloy was investigated. It is found that there is a critical casting temperature for the fully amorphous structure, below which the crystallization phase might be precipitated. Experiment results show that the compressive strength increases and the compressive plasticity slightly decreases when the casting temperature increases to certain extent. However, the compressive strength and the compressive plasticity simultaneously increase when the casting voltage increases to 9 kV, and the compressive plasticity is 2.62%. Mechanical properties of BMG can be tailored to certain extent by controlling the casting temperature, which is correlated with free volume and residual stresses.

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劉廣橋,寇生中,李春燕,趙燕春. Effect of Casting Temperature on Mechanical Properties and Microstructure of Zr53.9Cu29.4Ni4.9Al9.8Fe2 Bulk Metallic Glass[J].稀有金屬材料與工程,2012,41(11):1891~1895.[Liu Guangqiao, Kou Shengzhong, Li Chunyan, Zhao Yanchun. Effect of Casting Temperature on Mechanical Properties and Microstructure of Zr53.9Cu29.4Ni4.9Al9.8Fe2 Bulk Metallic Glass[J]. Rare Metal Materials and Engineering,2012,41(11):1891~1895.]
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  • 收稿日期:2011-11-25
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