On the sequence of clustering and ordering in a meltspun Cu-Ti alloy

被引：26

作者：

Batra, IS ^{[1
]}

Dey, GK ^{[1
]}

Kulkarni, UD ^{[1
]}

Banerjee, S ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Div Mat Sci, Bombay 400085, Maharashtra, India

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 360卷 / 1-2期

关键词：

spinodal decomposition; order/disorder transformations; clustering and ordering; transmission electron microscopy; Cu-Ti alloys; phase transformations;

D O I：

10.1016/S0921-5093(03)00440-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Although it is well established that dilute Cu-Ti alloys with titanium in the range of 2.5-5 wt.% decompose by a spinodal mechanism, the sequence of ordering and clustering processes in the early stages has been a matter of controversy. An attempt has been made in this work to resolve some of the issues by carrying out transmission electron microscopy (TEM) investigations on a dilute meltspun Cu-Ti alloy. Decomposition was studied as a function of ageing over a temperature range of 573-723 K. The results seem to suggest that clustering precedes the formation of long range ordered (LRO) phases in this alloy. Formation of a transitory special point N3M phase was observed for the first time in this work. This disappeared on prolonged ageing giving rise to the metastable Cu4Ti (Dl(a)). (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：220 / 227

页数：8

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