From thick intermetallic to nanoscale amorphous phase at Al-Fe joint interface: roles of friction stir welding conditions

被引：58
作者：
Liu, F. C. [1 ]
Dong, P. [1 ,2 ]
机构：
[1] Univ Michigan, Dept Naval Architecture & Marine Engn, Ann Arbor, MI 48109 USA
[2] Univ Michigan, Dept Mech Engn, Ann Arbor, MI 48109 USA
来源：
SCRIPTA MATERIALIA | 2021年 / 191卷
关键词：
Intermetallic compounds; Nanoscale shear localization; Amorphization; Dissimilar metal joining; Friction stir welding; ALUMINUM-ALLOY; MECHANICAL-PROPERTIES; DISSIMILAR ALUMINUM; GRAIN-SIZE; MICROSTRUCTURE; STEEL; EVOLUTION; STRENGTH; PROBE;
D O I：
10.1016/j.scriptamat.2020.09.031
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The formation of thick intermetallic compounds (IMC) at the joint interface between aluminum alloy and steel has been the major barrier for adopting Al-Fe bimetallic structures in safety-critical structures. Although friction stir welding (FSW) has recently shown some promise, the progress has been slow towards effectively controlling detrimental IMCs due to a lack of a better understanding of the effects of friction stir conditions on the Al-Fe interfacial transition layer development. This study presents a carefully designed FSW experiment to show how a thick intermetallic layer can be reduced to a nanoscale amorphous phase through control of friction stir conditions. Its implications on practical conditions for joining aluminum alloy and steel without detrimental IMCs are also discussed in light of both the experimental results and underlying mechanical and physical phenomena. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：167 / 172
页数：6
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