6061铝合金双向等通道挤压金属流动规律研究  

Metal Flow of 6061 Aluminum Alloy Processed by Dual Equal Channel Extrusion

作　　者：起华荣[1] 史庆南[1] 陶新姚 刘兆华[1] 王效琪[1] 成佳[1] 

机构地区：[1]昆明理工大学,云南昆明650093 [2]新光控股集团有限公司,浙江义乌322023

出　　处：《稀有金属材料与工程》2016年第9期2317-2321,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(u0837601)

摘　　要：以6061铝合金为对象采用数值模拟和实验验证的方法研究了双向等通道挤压过程金属流动规律。发现双向等通道技术能够在材料内部造成剧烈的剪切变形,具有晶粒细化和形变强化作用,可以通过调整摩擦系数对变形过程进行调控。通过对6061铝合金A、B 2种路径4道次双向等通道挤压发现,双向等通道挤压具有强烈的形变强化作用,在相同道次下,B路径等效应变量大于A路径。The metal flowing law of 6061 aluminium alloy in the dual equal channel extrusion process was researched by numerical simulation and experiments. Results show that the dual equal channel extrusion technique can cause severe shear deformation within the material, which possesses a grain refinement and deformation strengthening effect. The deformation process is controlled by adjusting the friction coefficient. Four passes dual equal extrusion with A and B paths was performed on the 6061 aluminum alloy. Results show that dual equal channel extrusion has a strong effective strain, and at the same pass, path B has a greater strain strengthening ability than path A.

关 键 词：双向等通道挤压 6061铝合金 金属流动规律 形变强化 

分 类 号：TG146.21[一般工业技术—材料科学与工程]