{"title":"Influence of clamp pressure on weld performance and fracture mode in laser welded polyamide-6 sheets","authors":"Dhruva Kumar Goyal , Arpit Bajpai , Ravi Kant","doi":"10.1016/j.matlet.2025.138542","DOIUrl":null,"url":null,"abstract":"<div><div>This study investigates the effect of clamp pressure on laser transmission welding of polyamide-6 sheets using electrolytic iron powder for energy absorption. Welding is performed with a fibre laser on 2 mm thick polyamide-6 sheets, and the influence of clamp pressure on weld strength and morphology is analysed. Results show that weld strength increases with pressure up to an optimal level but decreases beyond due to excessive molten polymer loss. SEM analysis confirms iron particle embedding, enhancing mechanical interlocking. Fractographic analysis shows substrate and interface fracture patterns with pressure variations, indicating differences in molecular interdiffusion. The findings highlight the importance of optimizing clamp pressure for better joint strength and integrity.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"392 ","pages":"Article 138542"},"PeriodicalIF":2.7000,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Letters","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167577X25005713","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/4/6 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
This study investigates the effect of clamp pressure on laser transmission welding of polyamide-6 sheets using electrolytic iron powder for energy absorption. Welding is performed with a fibre laser on 2 mm thick polyamide-6 sheets, and the influence of clamp pressure on weld strength and morphology is analysed. Results show that weld strength increases with pressure up to an optimal level but decreases beyond due to excessive molten polymer loss. SEM analysis confirms iron particle embedding, enhancing mechanical interlocking. Fractographic analysis shows substrate and interface fracture patterns with pressure variations, indicating differences in molecular interdiffusion. The findings highlight the importance of optimizing clamp pressure for better joint strength and integrity.
期刊介绍：
Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review.
Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials.
Contributions include, but are not limited to, a variety of topics such as:
• Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors
• Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart
• Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction
• Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots.
• Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing.
• Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic
• Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive
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