Effects of Cr addition on the microstructure and mechanical behavior of 6061-T6 continuously cast and rolled redraw rod

被引：25

作者：

Jeniski, RA

机构：

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1997年 / 237卷 / 01期

关键词：

Guinier technique; redraw rod; transmission electron microscopy;

D O I：

10.1016/S0921-5093(97)00116-0

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Chromium additions to 6061 aluminum alloy can form alpha-Al-12(Fe,Cr)(3)Si dispersoids during homogenization. Continuous cast bar does not receive a homogenization step and is rolled directly after casting, therefore, it is of interest to determine the effect of Cr addition on the microstructure and mechanical properties of continuous cast 6061-T6 rod. Microstructural examination of 0.5 inch diameter continuous cast and rolled 6061 w/Cr T6 rod revealed that the rod had a fully recrystallized microstructure with pancake-shaped grains indicative of aluminum alloys containing dispersoids. Examination of TEM samples confirmed the existence of alpha-Al-12(Fe,Cr)(3)Si dispersoids in the T6 rod microstructure. X-ray diffraction (Guinier technique) revealed that the 6061 w/Cr T6 rod contained alpha-Al12Fe3Si and alpha-Al-12(Fe,Cr)(3)Si constituent phases whereas the 6061-T6 rod without Cr contained only beta-Al9Fe2Si2. Tensile test results showed that Cr addition to 6061-T6 rod substantially improved the ductility of the rod. (C) 1997 Elsevier Science S.A.

引用

页码：52 / 64

页数：13

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