Surface topography and subsurface integrity of titanium grade 2 machined by nanosecond laser: the effects of scanning speed, laser power, and frequency

IF 4.4 3区 工程技术 Q1 ENGINEERING, CIVIL
Evangelos Nikolidakis, Emmanouil L. Papazoglou, Nikolaos E. Karkalos, Beata Leszczyńska-Madej, Panagiotis Karmiris-Obratański
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Abstract

Surface quality is a major requirement in industrial level for every mechanical part, as it can define not only their ability to be appropriately used in assemblies but also their service life. Nowadays, the increased capabilities of modern measurement equipment have allowed the study of more advanced parameters such as the uniformity of texture or functional parameters of the roughness profile, which can lead to reliable conclusions about tribological and lubrication properties of machined surfaces as well. In the present case, a thorough investigation of surface topography and texture was carried out for the case of laser engraving of square pockets on a titanium alloy workpiece under diverse process conditions. Analysis of the results revealed that apart from the high correlation of laser power and laser scanning speed with amplitude parameters of surface roughness, laser engraving can have a profound effect on directionality of the produced texture, with higher speeds and moderate VED values leading to less isotropic surfaces. Moreover, although based on the analysis of Ssk and Sku values, which were found to be mostly positive and below 4 respectively, most surfaces exhibit high peaks and reduced fluid retention capability, the latter can be increased by appropriately selecting the combination of process conditions during laser engraving process.

纳秒激光加工2级钛的表面形貌和亚表面完整性:扫描速度、激光功率和频率的影响
表面质量是工业水平对每个机械零件的主要要求,因为它不仅可以定义它们在装配中适当使用的能力,还可以定义它们的使用寿命。如今,现代测量设备的能力不断提高,可以研究更先进的参数,如纹理均匀性或粗糙度剖面的功能参数,这也可以得出关于加工表面摩擦学和润滑性能的可靠结论。本文对不同工艺条件下钛合金工件激光雕刻方口袋的表面形貌和织构进行了深入的研究。分析结果表明,激光雕刻除了激光功率和激光扫描速度与表面粗糙度的振幅参数高度相关外,激光雕刻对所产生织构的方向性有深远的影响,较高的速度和适中的VED值导致表面各向同性较小。此外,虽然通过对Ssk和Sku值的分析发现,大多数表面都呈现出高峰,流体保留能力降低,但在激光雕刻过程中,通过适当选择工艺条件组合,可以提高流体保留能力。
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来源期刊
Archives of Civil and Mechanical Engineering
Archives of Civil and Mechanical Engineering 工程技术-材料科学:综合
CiteScore
6.80
自引率
9.10%
发文量
201
审稿时长
4 months
期刊介绍: Archives of Civil and Mechanical Engineering (ACME) publishes both theoretical and experimental original research articles which explore or exploit new ideas and techniques in three main areas: structural engineering, mechanics of materials and materials science. The aim of the journal is to advance science related to structural engineering focusing on structures, machines and mechanical systems. The journal also promotes advancement in the area of mechanics of materials, by publishing most recent findings in elasticity, plasticity, rheology, fatigue and fracture mechanics. The third area the journal is concentrating on is materials science, with emphasis on metals, composites, etc., their structures and properties as well as methods of evaluation. In addition to research papers, the Editorial Board welcomes state-of-the-art reviews on specialized topics. All such articles have to be sent to the Editor-in-Chief before submission for pre-submission review process. Only articles approved by the Editor-in-Chief in pre-submission process can be submitted to the journal for further processing. Approval in pre-submission stage doesn''t guarantee acceptance for publication as all papers are subject to a regular referee procedure.
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