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Fe合金化對Cu36Zr48Ag8Al8非晶合金的組織和力學性能影響
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國家自然科學基金(50961008，51061008)；“973”計劃前期研究專項(2011CB612203)；高等學校博士學科點專項科研基金資助課題(20116201120003)；甘肅省青年科技基金計劃(1107RJYA275)；浙江省自然基金青年基金(LQBE010002)


Effect of Fe Element Addition on the Thermal Stability and Mechanical Behavior of (Cu0.36Zr0.48Ag0.08Al0.08)100-xFex Bulk Metallic Glass
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    摘要:

    選擇Cu36Zr48Ag8Al8BMG作為基體合金，研究Fe元素合金化對組織和力學性能的影響，分析了相分離非晶結(jié)構(gòu)和納米晶對合金力學行為的作用機理，并利用維氏硬度計考察了 Fe的摻雜對合金各相的相對硬度、塑性和壓痕形貌的影響規(guī)律。結(jié)果表明，TEM襯度的眀相為富Fe相，暗相為富Cu、Ag相，由于具有不同的模量和硬度的相分離兩相結(jié)構(gòu)的存在，非晶合金在外力加載時呈應(yīng)變硬化，而晶粒尺寸<5 nm的納米晶起到彌散強化作用，使合金的強度進一步提高。維氏壓頭作用下使準脆性的非晶合金發(fā)生顯著的塑性變形，非晶相硬度較高，其維氏壓痕的周圍形成了少量半圓型剪切帶，且在同樣的塑性變形量，塑性越好，剪切帶的數(shù)量較多、間距較小。晶相硬度較低，其壓痕周圍沒有裂紋出現(xiàn)

    Abstract:

    The effect and mechanism of Fe element addition in Cu36Zr48Ag8Al8 BMG on structure and mechanical properties were investigated. Effects of phase separation structure and nanocrystalline precipitation on mechanical behaviors were analyzed. Vickers hardness tests were used to study the effect of Fe addition on the hardness and shear band features of the BMG. The results show that Fe-enriched and Cu, Ag-enriched amorphous phase are light and dark phase in TEM contrast, respectively. Phase separation structure with different modulus and hardness in the amorphous alloy, leads to strain hardening behavior under loading. And the nanocrystallines smaller than 5 nm form and dispersion further strengthens the amorphous matrix. A few semi-circular shear bands form around Vickers indention of the amorphous phase. And more semi-circular shear bands with a smaller distance form as the indenter presses on the structure with better plasticity. The Vickers hardness of crystalline phase is lower than that of the amorphous phase, and no flaw exist around the indention

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趙燕春,寇生中,李春燕,蔣維科,李 超,丁雨田. Fe合金化對Cu36Zr48Ag8Al8非晶合金的組織和力學性能影響[J].稀有金屬材料與工程,2013,42(11):2304~2308.[Zhao Yanchun, Kou Shengzhong, Li Chunyan, Jiang Weike, Li Chao, Ding Yutian. Effect of Fe Element Addition on the Thermal Stability and Mechanical Behavior of (Cu0.36Zr0.48Ag0.08Al0.08)100-xFex Bulk Metallic Glass[J]. Rare Metal Materials and Engineering,2013,42(11):2304~2308.]
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  • 收稿日期:2012-11-22
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