Diffusion Bonding of Al-Mg-Si Alloy and 301L Stainless Steel by Friction Stir Lap Welding Using a Zn Interlayer

被引：5

作者：

Dong, Ji-Hong ^{[1
,2
,3
]}

Liu, Hua ^{[4
]}

Ji, Shu-De ^{[4
]}

Yan, De-Jun ^{[5
]}

Zhao, Hua-Xia ^{[3
]}

机构：

[1] Beijing Inst Petrochem Technol, Beijing 102617, Peoples R China

[2] Beijing Acad Safety Engn & Technol, Beijing 102617, Peoples R China

[3] AVIC Mfg Technol Inst, Beijing 100024, Peoples R China

[4] Shenyang Aerosp Univ, Coll Aerosp Engn, Shenyang 110136, Peoples R China

[5] CSSC Huangpu Wenchong Shipbldg Co Ltd, Guangdong Key Lab Enterprise Adv Welding Technol, Guangzhou 510715, Peoples R China

来源：

MATERIALS | 2022年 / 15卷 / 03期

基金：

中国国家自然科学基金;

关键词：

friction stir lap welding; dissimilar metals; diffusion layer; Zn interlayer; mechanical properties; MECHANICAL-PROPERTIES; JOINT STRENGTH; ALUMINUM-ALLOY; DEFECTS; 6061-T6;

D O I：

10.3390/ma15030696

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Friction stir lap welding (FSLW) is expected to join the hybrid structure of aluminum alloy and steel. In this study, the Al-Mg-Si aluminum alloy and 301L stainless steel were diffusion bonded by FSLDW with the addition of 0.1 mm thick pure Zn interlayer, when the tool pin did not penetrate the upper aluminum sheet. The characteristics of lap interface and mechanical properties of the joint were analyzed. Under the addition of Zn interlayer, the diffusion layer structure at lap interface changed from continuous to uneven and segmented. The components of the diffusion layer were more complex, including Fe-Al intermetallic compounds (IMCs), Fe-Zn IMCs and Al-Zn eutectic. The largely changed composition and thickness of uneven and segmented diffusion layer at the lap interface played a significant role in the joint strength. The tensile shear load of Zn-added joint was 6.26 kN, increasing by 41.3% than that of Zn-not-added joint. These two joints exhibited interfacial shear fracture, while the Zn interlayer enhanced the strength of diffusion bonding by extending the propagation path of cracks.

引用

页数：10

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