Joint features and mechanical properties of friction stir lap welded alclad 2024 aluminum alloy assisted by external stationary shoulder
Joint features and mechanical properties of friction stir lap welded alclad 2024 aluminum alloy assisted by external stationary shoulder
复制标题
外固定台肩辅助搅拌摩擦搭接焊alclad 2024铝合金接头特征及力学性能
DOI：
10.1016/j.matdes.2015.10.056
复制
发表时间：
2016-01-15
影响因子：
8.4
通讯作者：
Zhou, Zhenlu
中科院分区：
文献类型：
--
作者：
Li, Zhengwei;Yue, Yumei;Zhou, Zhenlu
采用外固定肩辅助搅拌摩擦搭接法成功连接了2024-T4 Alclad铝合金。重点研究了接头的表面形貌、断面、显微组织和搭接剪切破坏荷载。辅助外固定肩有利于关节的形成，消除或减少弧线波纹、闪光和空隙。与传统的FSLW接头相比，外固定肩辅助的FSLW接头具有更小的有效冷搭接板厚度（ESTC）、更大的有效搭接宽度（ELW）和更好的搭接抗剪破坏强度。外固定肩辅助FSLW节点的搭接剪切破坏载荷由于断裂模式不同，与ESTC或ELW不一致。外固定肩辅助下FSLW关节的断裂形态显示韧性断裂。(C) 2015 Elsevier Ltd.版权所有。
Alclad 2024-T4 aluminum alloy was successfully joined by friction stir lap welding (FSLW) assisted by external stationary shoulder in the present study. Joint surface appearances, cross-sections, microstructure and lap shear failure loads of the joints were mainly studied. The assisted external stationary shoulder is beneficial to the joint formation, by which arc corrugation, flash and void can be eliminated or diminished. Compared with the conventional FSLW joints, FSLW joints assisted by external stationary shoulder own smaller effective sheet thickness of cold lap (ESTC), bigger effective lap width (ELW) and better lap shear failure strength. Lap shear failure loads of the FSLW joints assisted by external stationary shoulder do not agree with ESTC or ELW due to different fracture modes. Fracture morphologies of the FSLW joints assisted by external stationary shoulder indicate ductile fracture. (C) 2015 Elsevier Ltd. All rights reserved.