Zr基块体非晶合金在过冷液态区微正挤压实验研究

中国机械工程 ›› 2011, Vol. 22 ›› Issue (17): 2108-2112.

Zr基块体非晶合金在过冷液态区微正挤压实验研究

王懿;郑志镇;李建军

华中科技大学材料成形与模具技术国家重点实验室，武汉，430074

出版日期:2011-09-10 发布日期:2011-09-14
基金资助:
国家自然科学基金资助重点项目(50635020)
Key Program of National Natural Science Foundation of China（No. 50635020）

Study on Micro Forward Extrusion of Zr-based Bulk Metallic Glass in Supercooled Liquid Region

Wang Yi;Zheng Zhizhen;Li Jianjun

State Key Laboratory of Materials Processing and Die & Mould Technology，Huazhong University of Science and Technology, Wuhan, 430074

Online:2011-09-10 Published:2011-09-14
Supported by:
Key Program of National Natural Science Foundation of China（No. 50635020）

摘要/Abstract

摘要：

为了研究Zr55Cu30Al10Ni5大块非晶合金在过冷液态区内的微正挤压变形行为，采用不同尺寸非晶合金圆柱形棒料在不同长度凹模工作带下进行了微正挤压实验。实验结果表明：所选非晶合金在成形温度450℃、初始应变速率0.001~0.01s-1的条件下正挤压是可行的;随着坯料尺寸减小，其单位挤压力和挤出胀大比均增大，且挤压成形力表现出不同的变化趋势;坯料在短凹模中的单位挤压力和挤出胀大比分别大于在长凹模中的单位挤压力和挤出胀大比。

关键词:

Zr基非晶合金, 过冷液态区, 微正挤压, 尺寸效应

Abstract:

In order to study the influence of specimen dimension and extruded die length on micro forward extrusion processing of Zr55Cu30Al10Ni5 bulk metallic glass in the supercooled liquid region, micro forward extrusion experiments with different specimen sizes using different extruded dies were proceeded, and the characteristic of material flow in different conditions were obtained. The results indicate that, the forward extrusion is feasible for Zr55Cu30Al10Ni5 bulk metallic glass at temperature 450℃ and strain rate 0.001~0.01s-1. Also, with the decrease of specimen size, the unit pressure of upper die and the swell ratio of specimen increase and the tendency of forming load changes. At last, when the specimen is extruded in a short die, the unit pressure and swell ratio are both larger than those of which is extruded in a long die.

Key words: Zr-based bulk metallic glass, supercooled liquid region, micro forward extrusion, size effect

中图分类号:

王懿, 郑志镇, 李建军.

Zr基块体非晶合金在过冷液态区微正挤压实验研究

[J]. 中国机械工程, 2011, 22(17): 2108-2112.

WANG Yi, ZHENG Zhi-Tian, LI Jian-Jun.

Study on Micro Forward Extrusion of Zr-based Bulk Metallic Glass in Supercooled Liquid Region

[J]. China Mechanical Engineering, 2011, 22(17): 2108-2112.

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