Formation of Micro-/Nano-Surface Structures on Stainless Steel by Ultrafast Lasers

2019 ◽  
Author(s):  
Kewei Li ◽  
Xin Zhao
Keyword(s):  
Stainless Steel ◽  
Ultrafast Lasers ◽  
Critical Factor ◽  
Pulse Number ◽  
Surface Structures ◽  
Femtosecond Laser Irradiation ◽  
Multi Scale ◽  
Structure Morphology ◽  
Micro Holes ◽  
Scale Surface

Abstract Surface morphology is a critical factor to determine the surface functionality. Ultrafast pulsed laser is a powerful tool to induce multi-scale surface structures on different materials, and thus control their functionalities. This paper presents an experimental study on the micro/nano-scale surface structure formation by femtosecond laser irradiation on stainless steel. The effects of laser fluence, effective pulse number per spot, and repetition rate on the structure morphology and dimension are studied. By controlling the laser parameters, four different types of structures are obtained: (1) laser-induced periodic surface structrues (LIPSS), (2) microgrooves covered by LIPSS, (3) microgrooves/micro-holes covered by LIPSS, and (4) irregular microstructures. The formation dynamics and mechanisms of different structures are investigated.

Lubricant migration on stainless steel induced by bio-inspired multi-scale surface patterns

2018 ◽  
Vol 150 ◽  
pp. 55-63 ◽  
Author(s):  
Philipp G. Grützmacher ◽  
Andreas Rosenkranz ◽  
Adam Szurdak ◽  
Carsten Gachot ◽  
Gerhard Hirt ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Multi Scale ◽  
Surface Patterns ◽  
Lubricant Migration ◽  
Scale Surface

Laser- and Filament-Induced Multi-scale Surface Structures on Solid Target Materials

CLEO: 2014 ◽  
2014 ◽  
Author(s):  
Anthony Valenzuela ◽  
Kristopher Behler ◽  
Chase Munson ◽  
Andrew Porwitzky ◽  
Matthew Weidman ◽  
...  
Keyword(s):  
Surface Structures ◽  
Solid Target ◽  
Multi Scale ◽  
Scale Surface

Multi-Scale Surface Characterization and Control Based High Density Measurements

2014 ◽  
Author(s):  
Xin Weng ◽  
Xiaoning Jin ◽  
Jun Ni
Keyword(s):  
Surface Quality ◽  
Process Monitoring ◽  
Surface Characterization ◽  
Quality Evaluation ◽  
Surface Shape ◽  
Machined Surface ◽  
Multi Scale ◽  
And Control ◽  
Scale Surface ◽  
Machined Surfaces

It is widely observed that today’s engineering products demand increasingly strict tolerances. The shape of a machined surface plays a critical role to the desired functionality of a product. Even a small error can be the difference between a successful product launch and a major delay. Thus, it is important to develop measurement tools to ensure the quality and accuracy of products’ machined surfaces. The key to assessing the quality is robust measurement and inspection techniques combined with advanced analysis. However, conventional Geometrical Dimensioning and Tolerancing (GD&T) such as flatness falls short of characterizing the surface shape. With the advancements in metrology methodology utilizing digital holographic interferometry, large amount of surface data can be captured at high resolution and accuracy without changing platform or technique. This captured High Definition Data (HDD) enables the mining of more valuable information from machined surfaces that most current industry practice cannot achieve in a timely manner. Such new metrology system opens the torrent of observable events at plant floor and increases the transparency of machining processes. This presents great opportunities to characterize machined surface into a new level of details, which can be applied in production quality evaluation and process condition monitoring and control. This research work proposes a framework of a multi-scale surface characterization for surface quality evaluation and process monitoring. Case studies are presented to show how proposed metrics could be applied in surface quality evaluation and process monitoring.

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