Influence of process parameters on the joint characteristics during laser joining of aluminium alloy and CFRTP

被引：41

作者：

Feng, Ziwei ^{[1
,2
]}

Ma, Guolong ^{[3
]}

Su, Jianhui ^{[1
,2
]}

Tan, Caiwang ^{[1
,2
]}

Han, Xiaohui ^{[3
]}

Zhao, Hongyun ^{[2
]}

Chen, Bo ^{[1
,2
]}

Song, Xiaoguo ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China

[2] Harbin Inst Technol Weihai, Shandong Prov Key Lab Special Welding Technol, Weihai 264209, Peoples R China

[3] CRRC Qingdao Sifang Co Ltd, Tech Engn Dept, Qingdao 266111, Peoples R China

来源：

JOURNAL OF MANUFACTURING PROCESSES | 2021年 / 64卷

基金：

中国国家自然科学基金;

关键词：

Laser joining; Dissimilar materials; CFRTP; Laser texturing; XPS; STAINLESS-STEEL; SURFACE MODIFICATION; STRENGTH; METAL; MICROSTRUCTURE; INTERFACE; POLYMERS;

D O I：

10.1016/j.jmapro.2021.03.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Fiber laser joining of 6061 aluminium alloy and carbon fiber reinforced thermoplastic composite (CFRTP) was performed in this work. The effect of three process parameters including laser power, traveling speed and defocus distance on the bonding interface and joint properties was investigated. Shear tests were performed to evaluate the joint strength in different variables. X-ray photoelectron spectroscopy (XPS) was adopted to confirm the chemical states of elements at the interface. The results indicated that the shear strength of joints first increased and then decreased with the increase of heat input. Insufficient flow of CFRTP could not fill the grooves of aluminium alloy surface at low heat input. The resin was decomposed at excessisvely high heat input, causing pores remained at the interface. The fracture mode was determined as the interface failure. XPS result revealed that no new chemical bond was found at the interface, and the mechanical interlocking between aluminium alloy and CFRTP was main bonding mechanism. The maximum shear strength was 23.8 MPa, which was obtained as laser power, traveling speed and defocus distance was 1100 W, 5 mm/s and +10 mm, respectively.

引用

页码：1493 / 1506

页数：14

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