Improvement of weld quality with beam-weavinglaser welding

Zhang, Xudong; Chen, Wuzhu; Bao, Gang

doi:10.2351/1.5060030

Cited by 9 publications

(9 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Consequently, the higher number of nuclei effectively retards the growth of columnar grains in the weld center. Similar observations have been documented for laser welding with oscillating beam guidance on finegrained steels [46]. The additional preheating (IV) does not result in any change of the grain shape but leads to a coarsening of the microstructure, which can be attributed to the reduced cooling rate (Fig.…”

Section: Resultssupporting

confidence: 82%

Electron Beam Welding of Hot-Rolled Fe–Mn–Al–Ni Shape Memory Alloy Sheets

Bauer

Wiegand

Wicke

et al. 2023

Shap. Mem. Superelasticity

View full text Add to dashboard Cite

The present study focuses on the weldability of hot-rolled Fe–Mn–Al–Ni shape memory alloy sheets by vacuum electron beam welding. Tailored process-specific welding parameters, such as preheating with electron beam or beam oscillation during welding, allowed defect-free joining with very thin weld seams and heat-affected zones. By applying a post-weld cyclic heat treatment, abnormal grain growth can be promoted across the weld seams. However, regardless of the selected welding parameters, some specimens are characterized by the formation of smaller grains within the former fusion zone. In situ incremental strain tests reveal that the former fusion zone has only a minor influence on the functional properties and is not responsible for structural failure. Thus, electron beam welding is a promising welding technology for joining Fe–Mn–Al–Ni shape memory alloys.

show abstract

Section: Resultssupporting

confidence: 82%

Electron Beam Welding of Hot-Rolled Fe–Mn–Al–Ni Shape Memory Alloy Sheets

Bauer

Wiegand

Wicke

et al. 2023

Shap. Mem. Superelasticity

View full text Add to dashboard Cite

show abstract

“…Various welding parameters have been studied in the literature to overcome the above-mentioned welding defects [5-12]. The studies followed different approaches, such as optimising welding speed and focal point position [5], applying double focus technique [6], using dual spot and single spot laser beam [7], applying different welding speeds and laser powers [8] and using oscillating beams [9].…”

Section: Introductionmentioning

confidence: 99%

Characterisation of figure-eight shaped oscillation laser welding behaviour of 5083 aluminium alloy

Kabasakaloglu

Erdogan

2020

Science and Technology of Welding and Joining

View full text Add to dashboard Cite

Figure-eight shaped oscillation movement of laser was studied to improve the welding quality of 5-mm-thick 5083 aluminium alloy. The tests were conducted at 3 kW laser power for frequency levels ranging from 25 to 125 Hz and focal point positions as 0, −1 and −2 mm. The quality of welds was characterised by non-destructive testing methods including visual, liquid penetrant and radiographic inspections. In addition, mechanical properties were determined by tensile tests and microstructures were examined by digital video camera and optical microscope. The results showed that welds with lower penetration depth and less porous structure could be obtained at 125 Hz frequency independent of the focal point position when compared to the joints produced without beam oscillation.

show abstract

“…Sheng et al [18] promoted the strength of the joint between CFRTP and stainless steel by adjusting process parameters such as laser power and laser scanning speed. Zhang et al [19] adopted the swing laser process, which can effectively reduce bubbles and re ne the weld grains, increasing the tensile strength of the joint by 39%. In order to improve the strength of the joining joint between CFRTP and aluminum alloy, pre-treatment before the laser joining process can be performed at the joining interface, such as surface micromachining, phosphating, and chromium plating.…”

Section: Introductionmentioning

confidence: 99%

Fracture characteristics of the laser bonding joint between the aluminum alloy and the CFRTP with preset aluminum alloy sheet

Luo

Wang

et al. 2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

This paper presents a method to improve the laser joint strength between carbon ber reinforced thermoplastic composite (CFRTP) and aluminum alloy. In this method, the aluminum alloy sheet is preset between the polyetheretherketone (PEEK) and carbon cloth, while the CFRTP with preset aluminum alloy sheet is attained by the compression molding method. The CFRTP with preset aluminum alloy sheet is connected to the aluminum alloy by laser heat source, and the maximum load of the joint can reach 4264 N. Microstructure and fracture surface morphology of joint are observed and analyzed. The results indicate that the element diffusion between the preset aluminum alloy sheet and CFRTP shows more signi cant compared with the interface of aluminum alloy and CFRTP due to the effect of hot pressing.The fracture failure mode of the lap structure between aluminum alloy and CFRTP is mixed fracture with adhesion fracture as the main component. The fracture position of preset aluminum alloy sheet and aluminum alloy lap structure occurs near the weld seam fusion line, while the fracture behavior presents a ductile fracture. The joint bonding force is mainly attributed to the collective effect of two lap structures, during the stretching process, the interface between aluminum alloy and CFRTP rst undergoes fracture, then preset aluminum alloy sheet undergoes plastic fracture failure.

show abstract

Improvement of weld quality with beam-weavinglaser welding

Cited by 9 publications

References 10 publications

Electron Beam Welding of Hot-Rolled Fe–Mn–Al–Ni Shape Memory Alloy Sheets

Electron Beam Welding of Hot-Rolled Fe–Mn–Al–Ni Shape Memory Alloy Sheets

Characterisation of figure-eight shaped oscillation laser welding behaviour of 5083 aluminium alloy

Fracture characteristics of the laser bonding joint between the aluminum alloy and the CFRTP with preset aluminum alloy sheet

Contact Info

Product

Resources

About