Sagging mechanisms in the brazing of aluminum heat exchangers

被引：23
|
作者：
Qin, Jining [1 ,2 ]
Kang, Suk-Bong [2 ]
Cho, Jae-Hyung [2 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China
[2] Korea Inst Mat Sci, Chang Won 641831, Gyeongnam, South Korea
来源：
SCRIPTA MATERIALIA | 2013年 / 68卷 / 12期
关键词：
Aluminum alloys; Sag resistance; Brazing; Microstructure; AL-SI ALLOYS; INTERMETALLIC PHASES; BRAZEABILITY; SOLIDIFICATION; SHEETS;
D O I：
10.1016/j.scriptamat.2013.02.039
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A sagging mechanism was investigated using a sagging test rig to evaluate the brazeability of an aluminum sheet. The results show that sagging was controlled by softening of the elastic modulus in the initial stage, followed by an accelerative sagging stage, which was induced by both the dissolution of nanoprecipitates and the softening of the elastic modulus. Abnormal grain growth, which is related to the amount of final cold-rolling reduction, is responsible for the cessation of sagging at the end of the sagging process. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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页码：941 / 944
页数：4
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