Hybrid friction diffusion bonding of aluminium tube-to-tube-sheet connections in coil-wound heat exchangers

被引：15

作者：

Dethlefs, A. ^{[1
]}

Roos, A. ^{[1
]}

dos Santos, J. F. ^{[1
]}

Wimmer, G. ^{[2
]}

机构：

[1] Helmholtz Zentrum Geesthacht, Ctr Mat & Coastal Res, Inst Mat Res, D-21502 Geesthacht, Germany

[2] Linde AG, Div Engn, Werk Schalchen, D-83342 Tacherting, Germany

来源：

MATERIALS & DESIGN | 2014年 / 60卷

关键词：

Joining; Welding; Diffusion; Bonding; Heat exchanger; Aluminium; MAGNESIUM ALLOY; SELECTION; BEHAVIOR; FSW;

D O I：

10.1016/j.matdes.2014.03.049

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present study presents and evaluates an application of a new solid-state bonding process, hybrid friction diffusion bonding (HFDB). HFDB is used to fabricate tube-to-tube-sheet connections for aluminium coil-wound heat exchangers. An industry-applicable process variant is developed, and its feasibility is demonstrated by gas leak tightness tests and tensile pull-out tests. The joints meet the requirements of industrial applications. Furthermore, the process is characterised by the thermal field development in the weld area and the applied process forces. The microstructure of the joint is investigated, and dynamic recrystallization is assumed to be the primary grain refinement mechanism in the thermomechanically affected zone. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：7 / 12

页数：6

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