Journal of Advanced Joining Processes最新文献

Linear friction welding of T-Joints in low carbon steel: Effect of welding parameters on joint quality 低碳钢 T 型接头的线性摩擦焊：焊接参数对接头质量的影响

IF 3.8

Journal of Advanced Joining Processes Pub Date : 2024-11-01 DOI: 10.1016/j.jajp.2024.100267

Huilin Miao , Takayuki Yamashita , Kohsaku Ushioda , Seiichiro Tsutsumi , Yoshiaki Morisada , Hidetoshi Fujii

{"title":"Linear friction welding of T-Joints in low carbon steel: Effect of welding parameters on joint quality","authors":"Huilin Miao , Takayuki Yamashita , Kohsaku Ushioda , Seiichiro Tsutsumi , Yoshiaki Morisada , Hidetoshi Fujii","doi":"10.1016/j.jajp.2024.100267","DOIUrl":"10.1016/j.jajp.2024.100267","url":null,"abstract":"<div><div>Linear friction welding (LFW) is a well-established solid-state joining technique. However, its application in T-joint configurations remains unexplored. This study investigated the effects of welding parameters, such as oscillation direction, upset, and applied pressure after oscillation, on linear friction welded (LFWed) T-joints using low-carbon steel SM490A. The flash ejection behavior, flash profiles, microhardness, microstructure at the welding interface, and tensile properties of the joints were evaluated under various welding conditions. The results indicated that flash symmetry was lower along the oscillation direction and higher perpendicular to it. Short-side oscillation produced more homogeneous flash ejection compared to long-side oscillation. No distinct softening zones were observed in the hardness profiles of the LFWed T-joints. The microstructure at the welding interface consisted of martensite, bainite, and ferrite, indicating that the weld region reached temperatures above the <em>A<sub>1</sub></em> temperature. The martensite fraction and hardness increased with higher upset and applied pressure after oscillation. Tensile tests revealed 100 % joint efficiency across all welding conditions, with ductile fracture occurring in the base metal due to the absence of welding defects and increased hardness at the interface.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"10 ","pages":"Article 100267"},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Joining by forming of bi-material collector coins with rotating elements 以成型方式连接带有旋转元件的双材料收藏硬币

IF 3.8

Journal of Advanced Joining Processes Pub Date : 2024-11-01 DOI: 10.1016/j.jajp.2024.100265

Pedro M.S. Rosado , Rui F.V. Sampaio , João P.M. Pragana , Ivo M.F. Bragança , Carlos M.A. Silva , Paulo A.F. Martins

{"title":"Joining by forming of bi-material collector coins with rotating elements","authors":"Pedro M.S. Rosado , Rui F.V. Sampaio , João P.M. Pragana , Ivo M.F. Bragança , Carlos M.A. Silva , Paulo A.F. Martins","doi":"10.1016/j.jajp.2024.100265","DOIUrl":"10.1016/j.jajp.2024.100265","url":null,"abstract":"<div><div>This paper presents a novel manufacturing process for producing innovative bi-material collector coins with free-rotating inner elements. The inner elements are fabricated using additive manufacturing, enabling the creation of coins with complex and intricate geometric details that would be unattainable using conventional wrought materials. The outer elements (rings) are metallic, and this study addresses the challenge of securely connecting them to the inner elements through force-closed mechanisms formed during the coin minting process. Finite element modeling, combined with experimentation on bi-material (polymer-metal and metal-metal) coins, is employed to analyze material flow, assess minting forces, and evaluate contact pressures at the force-closed joints. The analysis ensures that adequate destructive forces are required to separate the inner elements from the rings and provides insights into selecting the appropriate process parameters for simultaneous coining and joining. The successful production of the first bi-material collector coin prototypes with free-rotational inner elements validates the overall development.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"10 ","pages":"Article 100265"},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of the material properties on the clinching process and the resulting load-bearing capacity of the joint 材料特性对夹紧过程和由此产生的接头承重能力的影响

IF 3.8

Journal of Advanced Joining Processes Pub Date : 2024-11-01 DOI: 10.1016/j.jajp.2024.100263

Christian Steinfelder, Dennis Rempel, Alexander Brosius

{"title":"Influence of the material properties on the clinching process and the resulting load-bearing capacity of the joint","authors":"Christian Steinfelder, Dennis Rempel, Alexander Brosius","doi":"10.1016/j.jajp.2024.100263","DOIUrl":"10.1016/j.jajp.2024.100263","url":null,"abstract":"<div><div>This study focuses on the phenomenological change in material strength caused by a specific heat treatment and the subsequent analysis of the influence on the clinching process and the resulting joint properties. For this purpose, three series of tests were performed. In the first series of tests, the influence of heat treatment up to 340 °C on the mechanical properties of an age-hardenable AlMgSi alloy was investigated. Holding time and temperature were varied and the material strength was evaluated by tensile and hardness tests. Two strength-increasing and two strength-reducing heat treatment parameters were identified. In the second series of tests, selected heat treatment parameters were applied to a larger number of specimens and the joint strength was investigated by shear and head tensile tests. In the shear tensile test, mainly the properties of the punch-side material have an influence on the resulting joint strength. A change in strength of the die-side material can be neglected. In contrast, the properties of both sheets are important in the head tensile test. The strength of the joint will only increase if the strength of both sheets is increased. In general, a strength increasing heat treatment resulted in higher joint strength. In the third series of tests, the factor of punch displacement was considered, which was demonstrated to directly influence the formation of the clinched joint geometry.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"10 ","pages":"Article 100263"},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancement of joint quality for laser welded dissimilar material cell-to-busbar joints using meta model-based multi-objective optimization 利用基于元模型的多目标优化技术提高激光焊接异种材料电池-母线接头的接头质量

IF 3.8

Journal of Advanced Joining Processes Pub Date : 2024-11-01 DOI: 10.1016/j.jajp.2024.100261

Andreas Andersson Lassila, Tobias Andersson, Rohollah Ghasemi, Dan Lönn

{"title":"Enhancement of joint quality for laser welded dissimilar material cell-to-busbar joints using meta model-based multi-objective optimization","authors":"Andreas Andersson Lassila, Tobias Andersson, Rohollah Ghasemi, Dan Lönn","doi":"10.1016/j.jajp.2024.100261","DOIUrl":"10.1016/j.jajp.2024.100261","url":null,"abstract":"<div><div>In the battery pack assembly, it is essential to ensure that the cell-to-busbar joints can be produced with high quality and with minimal impact on the individual battery cells. This study examines the influence of process parameters on the joint quality for nickel-plated copper and steel plates, laser welded in an overlap configuration. Artificial neural network-based meta models, trained on numerical results from computational fluid dynamics simulations of the laser welding process, are used to predict and evaluate the joint quality. A set of optimized process parameters is identified, in order to simultaneously maximize the interface width for the joints, and minimize the formation of undercuts and in-process temperatures. In an meta model-based multi-objective optimization approach, the non-dominated sorting genetic algorithm II (NSGA-II) is used to efficiently search for trade-off solutions and the meta models are used for objective approximation. As a result, the objective evaluation time is decreased from around 9 h, when evaluated directly from numerical simulations, to only tenths of a second. From the Pareto-optimal front of trade-off solutions, three optimal solutions are selected for validation. The selected solutions are validated through laser welding experiments and numerical simulations, resulting in joints with large interface widths and low in-process temperatures without a full penetration.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"10 ","pages":"Article 100261"},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crack-free manufacture of single weld tracks on aluminum alloy 6013 with the usage of laser beam shaping and oscillation strategies

IF 3.8

Journal of Advanced Joining Processes Pub Date : 2024-11-01 DOI: 10.1016/j.jajp.2024.100269

Thomas Stoll , Maximilian Schmitt , Laura-Marie Müller , Frank Palm

{"title":"Crack-free manufacture of single weld tracks on aluminum alloy 6013 with the usage of laser beam shaping and oscillation strategies","authors":"Thomas Stoll , Maximilian Schmitt , Laura-Marie Müller , Frank Palm","doi":"10.1016/j.jajp.2024.100269","DOIUrl":"10.1016/j.jajp.2024.100269","url":null,"abstract":"<div><div>The present paper investigates the application of laser beam shaping and laser beam oscillations (wobbling) for laser processing of the crack-prone aluminum alloy 6013, used in automotive and aerospace applications. A comparison of different laser beam profiles, such as the commonly used Gaussian profile, a ring-core distribution with the intensity of 50 % in the ring and 50 % in the core, and a ring-shaped beam profile shows different cracking behavior of the material. The ring-shaped beam profile shows the most promising results due to a reduction of the thermal gradient G and an enhancement of the growth rate R, which isalso stated by the state of the art. A combination of laser beam shaping and laser beam oscillations shows reproducible crack-free processing of Al6013 sheets at all three beam profiles at different parameter combinations. The crack elimination can be attributed to the emergence of a more pronounced equiaxed grain structure in the fusion zone of the weld with the application of laser beam oscillations and laser beam shaping. Thus, the temperature gradient G, the growth rate R and, therefore, the cooling rate can be controlled with the presented variation of the laser beam shapes and scanning strategies. Furthermore, the penetration depth of the laser at a Gaussian beam profile can be reduced using laser beam shaping, showing shallower melt pools with a lower depth-to-width aspect ratio, also suitable for the process of powder bed fusion of metals using a laser-based system (PBF-LB/M).</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"10 ","pages":"Article 100269"},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laser welding thermal analysis of 20mm-thick EH40 steel with gap through an equivalent thermal conductivity method 通过等效导热法对有间隙的 20mm 厚 EH40 钢进行激光焊接热分析

IF 3.8

Journal of Advanced Joining Processes Pub Date : 2024-11-01 DOI: 10.1016/j.jajp.2024.100266

Guolong Zhang , Yu Huang , Xuanrui Liu , Hui Wang , Youmin Rong , Yifan Peng , Jiajun Xu

{"title":"Laser welding thermal analysis of 20mm-thick EH40 steel with gap through an equivalent thermal conductivity method","authors":"Guolong Zhang , Yu Huang , Xuanrui Liu , Hui Wang , Youmin Rong , Yifan Peng , Jiajun Xu","doi":"10.1016/j.jajp.2024.100266","DOIUrl":"10.1016/j.jajp.2024.100266","url":null,"abstract":"<div><div>Laser welding of thick plates is extremely sensitive to the gap between joints. With the same laser welding parameters, slight adjustment of the gap can lead to different weld morphologies. An appropriate joint gap is conducive to increasing the penetration depth and reducing defects. To investigate the influence of the gap between butt joints on the penetration depth during single-pass laser welding of 20 mm thick EH40 steel, five groups of experiments were conducted with a laser power of 15 kW and a welding speed of 10mm/s, and gap sizes ranging from 0 to 0 .4mm. A finite element model of the temperature field was established for the experimental samples. Using the concept of equivalent substitution, the heat transfer process was used to replace the downward flow of the molten pool along the gap, and the equivalent thermal conductivity was derived to predict the penetration depth under different gap sizes. The results showed that within the gap range of 0–0.3 mm, the penetration depth increased and spatter decreased as the gap increased. When the gap exceeded 0.2 mm, weld depression began to appear. The maximum penetration depth of 19.33 mm was achieved when the gap was 0 .3mm. When the gap reached 0.4 mm, unacceptable severe collapse occurred in the weld. Additionally, the accuracy of the temperature field simulation results was verified by the experimental results.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"10 ","pages":"Article 100266"},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization of physical metallurgy of quenching and partitioning steel in pulsed resistance spot welding: A simulation-aided study 脉冲电阻点焊中淬火和分区钢的物理冶金特性：模拟辅助研究

IF 3.8

Journal of Advanced Joining Processes Pub Date : 2024-11-01 DOI: 10.1016/j.jajp.2024.100264

Ali Bahmani, Vahid Feizollahi, Rouholah Ashiri

{"title":"Characterization of physical metallurgy of quenching and partitioning steel in pulsed resistance spot welding: A simulation-aided study","authors":"Ali Bahmani, Vahid Feizollahi, Rouholah Ashiri","doi":"10.1016/j.jajp.2024.100264","DOIUrl":"10.1016/j.jajp.2024.100264","url":null,"abstract":"<div><div>This study mainly focuses on the microstructure evolution of QP980 steel during resistance spot welding and its influence on the mechanical performance of resistance spot welds which is a critical influencing factor on the quality of body-in-white at the service condition. It is observed that the thermomechanically engineered microstructure of QP980 steel changes to form metastable phases such as martensite in the fusion zone and the heat affected zone due to rapid cooling induced by the thermal cycle of the welding. A finite element modeling of the welding process was used to predict the weldment heat distribution, thermal history and microstructure evolution in different welding zones. The modeled thermal history of the weldments shows that the peak temperature in the four-pulse resistance spot welding is delayed because of pulsed welding conditions and holding times between the welding pulses. This heat management approach in pulsed welding prevents void formation. The modeled thermal history and rapid heating, and cooling conditions are discussed here to predict the microstructure evolution and transformation in the fusion and reheated zones. The modeled results were helpful in the prediction of the microstructure at different weld zones. Then the strategic links between the microstructure and mechanical performance of the welded alloy are discussed thoroughly. The microhardness profile of the weld is discussed from a microstructural point of view to disclose the physical metallurgy of the welds. Softening phenomena were not observed in the sub-critical heat affected zone.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"10 ","pages":"Article 100264"},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142550553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A comprehensive techno-economic and environmental comparison of plasma-treated adhesive-bonded thermoplastic composites 等离子体处理的粘合剂粘结热塑性复合材料的技术经济和环境综合比较

IF 3.8

Journal of Advanced Joining Processes Pub Date : 2024-11-01 DOI: 10.1016/j.jajp.2024.100268

Chiara Mandolfino, Lucia Cassettari, Marco Pizzorni, Luigi Benvenuto, Enrico Lertora

{"title":"A comprehensive techno-economic and environmental comparison of plasma-treated adhesive-bonded thermoplastic composites","authors":"Chiara Mandolfino, Lucia Cassettari, Marco Pizzorni, Luigi Benvenuto, Enrico Lertora","doi":"10.1016/j.jajp.2024.100268","DOIUrl":"10.1016/j.jajp.2024.100268","url":null,"abstract":"<div><div>Thermoplastic composites are gaining attention for their ability to support a circular economy, shifting away from traditional cost-driven design. Unlike thermoset composites, commonly used in automotive and aerospace sectors, thermoplastic composites offer recyclability, promoting environmental and economic sustainability. Adhesive bonding in thermoplastic composites provides even stress distribution, maintaining structural integrity and reducing delamination risks, which is crucial for lightweight design in transport and renewable energy applications. Optimising adhesive bonded joints is essential to improve structural integrity, efficiency and sustainability. This involves balancing technical, economic and environmental factors, with surface preparation, plasma treatment in particular, playing a key role.</div><div>This paper provides a comprehensive techno-economic-environmental comparison of adhesive bonded joints. The study integrates cost-effectiveness, production efficiency and environmental impact assessments to guide informed decision-making. The methodology includes preparing substrates with low-pressure plasma surface treatments, forming adhesive-bonded joints with different adhesives, and optimising process parameters using Response Surface Methodology (RSM). A Life Cycle Assessment (LCA) on optimised scenarios enhances Tensile Shear Strength (TSS). The study concludes with a comprehensive comparison, offering insights for resilient, efficient and sustainable engineering solutions.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"10 ","pages":"Article 100268"},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving the joint strength of thermoplastic composites joined by press joining using laser-based surface treatment 利用激光表面处理技术提高热塑性复合材料的接合强度

IF 3.8

Journal of Advanced Joining Processes Pub Date : 2024-11-01 DOI: 10.1016/j.jajp.2024.100260

Alexander Liebsch , Daniel Wohlfahrt , Thomas Kuntze , Levin Schilling , Jana Gebauer , Robert Kupfer , Niels Modler , Andrés Fabián Lasagni , Maik Gude

{"title":"Improving the joint strength of thermoplastic composites joined by press joining using laser-based surface treatment","authors":"Alexander Liebsch , Daniel Wohlfahrt , Thomas Kuntze , Levin Schilling , Jana Gebauer , Robert Kupfer , Niels Modler , Andrés Fabián Lasagni , Maik Gude","doi":"10.1016/j.jajp.2024.100260","DOIUrl":"10.1016/j.jajp.2024.100260","url":null,"abstract":"<div><div>Fibre-reinforced thermoplastic composites (TPC) provide an automated and cost-effective solution for their use in lightweight structures in series production. The combination of different material configurations allows the design of highly stress tolerant components. Previous studies demonstrated that the combination of TPC sheets, TPC hollow profiles and injection moulding compounds is even suitable for crash-relevant automotive parts. All three components are combined during the injection moulding process. To prevent collapse, the part must remain in a consolidated state and cannot be preheated. However, this results in poor adhesion between the hollow profile, the bulk material, and the TPC sheet. Previous studies have shown that the bonding strength between the hollow profile and the injection moulding compound can be increased by surface pre-treatment using laser structuring and plasma technology. In this work, laser structuring is employed to enhance the bonding strength between the hollow profile and the TPC sheet. Microscopy analysis is used to investigate the resulting surface morphology. Subsequently, single-lap-shear (SLS) specimens are produced by pressing the TPC sheets onto the flat part. The resulting bonding strengths are then evaluated by tensile shear tests. The study analyses the impact of various pre-treatment parameters on the bonding strength. Furthermore, it investigates the effect of sheet temperature on the bonding strength, including specimens without pre-treatment. Finally, the results of the surface treatment of hollow composite profiles are discussed.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"10 ","pages":"Article 100260"},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142550552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ablation treatment of CFRP via nanosecond pulsed Ytterbium-doped fiber laser: Effects of process parameters on surface morphology and shear strength of adhesive bonded joints

IF 3.8

Journal of Advanced Joining Processes Pub Date : 2024-11-01 DOI: 10.1016/j.jajp.2024.100270

Chiara Mandolfino , Fabrizio Moroni , Marco Pizzorni

{"title":"Ablation treatment of CFRP via nanosecond pulsed Ytterbium-doped fiber laser: Effects of process parameters on surface morphology and shear strength of adhesive bonded joints","authors":"Chiara Mandolfino , Fabrizio Moroni , Marco Pizzorni","doi":"10.1016/j.jajp.2024.100270","DOIUrl":"10.1016/j.jajp.2024.100270","url":null,"abstract":"<div><div>Adhesive bonding is the joining technique that provides the maximum exploitation of Carbon Fiber Reinforced Polymers (CFRPs) for structural applications. However, it is necessary to attain a high-strength adhesive bond, achieved by removing surface contaminants, such as mold release agents, and simultaneously generating a surface structure suitable to increase the actual contact surface area. The purpose of the research work presented in this paper is to evaluate the effect of process parameters of a nanosecond pulsed laser pre-bonding surface treatment on the ablation of thermoset matrix CFRP substrates. In particular, the link between the volume of ablated material and the tensile shear strength (TSS) of adhesive bonded joints was evaluated by lap-shear tests, profilometer surveys, and Scanning Electron Microscope (SEM) analysis. ANOVA and regression models were used to highlight the influence of laser parameters, with power emerging as the most significant factor, and energy density proving pivotal for joint strength. Line spacing was also significant, while scanning direction had negligible impact. The key outcomes of the study demonstrated that controlled laser ablation plays a critical role in determining joint performance. A negative correlation was found between TSS and the thickness of ablated material, indicating that excessive ablation weakens the bond. Optimal joint strength was achieved with moderate fiber exposure while maintaining matrix integrity, emphasizing the need for precise control over laser parameters. Fracture surface analyses revealed distinct failure mechanisms, ranging from cohesive failure within the adhesive layer to interfacial failure at the fiber-matrix boundary, depending on the ablation conditions. The findings provide clear guidelines for optimizing laser surface treatments to enhance the structural performance of CFRP adhesive joints in practical applications.</div></div>","PeriodicalId":34313,"journal":{"name":"Journal of Advanced Joining Processes","volume":"10 ","pages":"Article 100270"},"PeriodicalIF":3.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142757453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0