Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 25    No. 5    May 2015

[PDF Download]        

    

Microstructure and texture evolution of Al-7075 alloy processed by equal channel angular pressing
M. H. SHAERI1, M. SHAERI2, M. T. SALEHI3, S. H. SEYYEDEIN3, F. DJAVANROODI4,5

1. Department of Metallurgy and Materials Engineering, Engineering Faculty,
Imam Khomeini International University, Qazvin 34149-16818, Iran;
2. Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran;
3. Department of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran;
4. Department of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran;
5. Department of Mechanical Engineering, Prince Mohammad Bin Fahd University, Al Khobar 31952, Saudi Arabia

Abstract:Equal channel angular pressing is an effective technique to control the texture and microstructure of metals and alloys. Texture and microstructure of an Al-7075 alloy subjected to repetitive equal channel angular pressing through a 90° die were evaluated by X-ray diffractometer and orientation imaging microscopy. It is observed that processing through different routes leads to different types of textures, in both qualitative and quantitative senses. The texture calculation by Labotex software reveals that texture strengthens after the first pass and weakens by progressing ECAP process up to 4 passes. Microstructure investigations show that after 4 passes of equal channel angular pressing via routes BC and A, very fine grains with average grain size of about 700 nm and 1 μm appear, respectively, and most of the grains evolve into arrays of high angle boundaries. The effects of covering the Al-7075 billets with copper tube on texture and microstructure were also studied.

 

Key words: equal channel angular pressing; crystallographic texture; aluminum alloy; ultra-fine grain

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com