| 四种块体非晶合金在过冷液相区内的微成形能力 |
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| 引用本文： | 张 猛,李 宁,谌 祺,柳 林. 四种块体非晶合金在过冷液相区内的微成形能力[J]. 稀有金属材料与工程, 2011, 40(12): 2162-2166 |
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| 作者姓名： | 张 猛 李 宁 谌 祺 柳 林 |
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| 作者单位： | 华中科技大学材料成形与模具技术国家重点实验室,湖北武汉,430074 |
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| 基金项目： | 国家自然科学基金（50636020）；国家重大基础研究项目（2007CB613900）资助 |
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| 摘 要： | 采用Si模制作的V型槽微压印实验评价了4种具有不同脆度的块体非晶合金(Pd40Cu30Ni10P20,Zr65Cu15Al10Ni10,Cu46Zr42Al7Y5,Zr58.5Cu15.6Al10.3Ni12.8Nb2.8)在过冷液相区内的微成形能力.结果表明,尽管不同的BMG表现出不同的表观粘度,但在相同的应变条件下,各种BMG却呈现出相似的充型面积,这表明它们具有相似的微成形能力.这一结果源于在本实验条件下(成形温度T=1.07Tg,应变率(ε)=2×10-3s-1),各BMG均遵循相同的牛顿流变机制.最后,通过有限元模拟验证了这一结论.
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| 关 键 词： | 块体非晶合金 过冷液相区 脆度 微成形能力 |
| 收稿时间： | 2010-12-05 |
Microformability of Bulk Amorphous Alloys in the Supercooled Liquid Region |
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| Zhang Meng,Li Ning,Chen Qi and Liu Lin. Microformability of Bulk Amorphous Alloys in the Supercooled Liquid Region[J]. Rare Metal Materials and Engineering, 2011, 40(12): 2162-2166 |
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| Authors: | Zhang Meng Li Ning Chen Qi Liu Lin |
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| Affiliation: | The State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | The microformability in the supercooled liquid region of 4 bulk metallic glasses (Pd40Cu30Ni10P20,Zr65Cu15Al10Ni10,Cu46Zr42Al7Y5,Zr58.5Cu15.6Al10.3Ni12.8Nb2.8) with different fragility values was investigated with microimprinting experiment on a micro-V shaped silicon mould.Results show that the bulk metallic glasses (BMGs) show different apparent viscosity.But under the condition of the same deformation,the 4 BMGs exhibit almost the same area of flowed into the groove,namely they show similar microformability.This is attributed to the adopted experimental conditions (T=1.07Tg,=2×10-3 s-1) under which the BMGs show a Newtonian flow behavior.The FEM study also verifies this conclusion. |
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| Keywords: | bulk metallic glass supercooled liquid region fragility microformability |
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