An in-situ method to estimate the tip temperature and phase selection of secondary Fe-rich intermetallics using synchrotron X-ray radiography

被引：21
作者：
Feng, S. [1 ]
Liotti, E. [1 ]
Lui, A. [1 ]
Kumar, S. [1 ]
Mahadevegowda, A. [1 ]
O'Reilly, K. A. Q. [1 ]
Grant, P. S. [1 ]
机构：
[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England
来源：
SCRIPTA MATERIALIA | 2018年 / 149卷
基金：
英国工程与自然科学研究理事会;
关键词：
Intermetallics; Tip temperature; Phase selection; Al alloys; Synchrotron X-ray radiography; MECHANICAL-PROPERTIES; DENDRITE FRAGMENTATION; LOCALIZED CORROSION; ALUMINUM-ALLOY; PARTICLES; AL7CU2FE; IRON; MICROSTRUCTURE; BEHAVIOR;
D O I：
10.1016/j.scriptamat.2018.02.001
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A method was developed based on synchrotron X-ray radiography to estimate tip temperatures of 203 Fe-rich intermetallic compound (IMC) particles during directional solidification of Al-Cu-Fe alloys. Tip temperatures showed two distinct IMC populations corresponding to Al-6(Fe,Cu) and Al7Cu2Fe, validated by post-solidification microscopy. The IMC tip undercooling of each growing IMC was estimated by comparison with its equilibrium formation temperature. The effect of Fe concentration, cooling rate and grain refiner additions on the IMC tip undercooling was studied. With a large number of IMC particles measured, we show the relationship between solidification parameters, secondary IMC selection and tip undercooling. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：44 / 48
页数：5
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