Microstructure of two-phase Al-1.7 at% Cu alloy deformed by equal-channel angular pressing

被引：350

作者：

Murayama, M

Horita, Z

Hono, K

机构：

[1] Natl Res Inst Met, Tsukuba, Ibaraki 3050047, Japan

[2] Kyushu Univ, Fac Engn, Dept Mat Sci & Engn, Fukuoka 8128581, Japan

来源：

ACTA MATERIALIA | 2001年 / 49卷 / 01期

关键词：

equal-channel angular pressing (ECAP); microstructure; transmission electron microscopy (TEM); cold working; aluminium alloys;

D O I：

10.1016/S1359-6454(00)00308-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructural changes of an aged Al-1.7 at% Cu alloy associated with severe plastic deformation have been studied by transmission electron microscopy (TEM) and energy-filtered transmission electron microscopy (EF-TEM). m theta' precipitates are almost completely dissolved after eight passes of equal-channel angular (ECA) pressing, and nearly single-phase alpha with a fine grain size of approximately 500 nm is obtained. When a severely deformed sample is aged for 24 h at 100 degreesC, precipitation of equiaxed theta phase is observed along the grain boundaries, whereas only Guinier-Preston (GP) zones are formed in the undeformed sample. The dissolution and precipitation processes in severely deformed Al-1.7 at% Cu alloy have been examined by TEM and energy-filter mapping. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

引用

页码：21 / 29

页数：9

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