A study on the effect of ultrashort pulsed laser texturing on the microstructure and properties of metastable S phase layer formed on AISI 316L surfaces

Behnam Dashtbozorg; Xiaoying Li; Jean-Michel Romano; Antonio Garcia Giron; Rachel Sammons; Stefan Dimov; Hanshan Dong

doi:10.1016/j.apsusc.2020.145557

A study on the effect of ultrashort pulsed laser texturing on the microstructure and properties of metastable S phase layer formed on AISI 316L surfaces

Behnam Dashtbozorg^*, Xiaoying Li, Jean-Michel Romano, Antonio Garcia Giron, Rachel Sammons, Stefan Dimov, Hanshan Dong

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

234 Downloads (Pure)

Abstract

Austenitic stainless steels (ASS) are an important material within the food and medical industries. However, their current limitations of poor wear resistance and susceptibility to bacterial colonisation have limited further uptake. Low-temperature plasma nitriding can address the poor durability of the ASS alloys by forming the S phase, therefore, providing combined improvement in hardness, wear resistance and corrosion resistance. Additionally, pulsed laser texturing can also be used to introduce functional antibacterial textures. However, due to the thermal nature of laser patterning and the thermodynamic metastability of the S phase, almost no research has been conducted thus far on combining the technologies.

Therefore, this study for the first time has investigated the response of S phase treated surfaces to ultrashort (nano and femtosecond) laser texturing. The results have shown that, both theoretically and in practice, laser pulses within the nanosecond regime led to the damage of the surface, decomposition of the metastable S phase and loss of the corrosion resistance. In contrast, no change of the S phase surface layer could be detected following femtosecond laser texturing. Hence, demonstrating the feasibility of texturing S phase surfaces using femtosecond pulsed lasers, thus paving the way towards long-lasting multi functional antibacterial stainless steel surfaces.

Original language	English
Article number	145557
Pages (from-to)	1-13
Number of pages	13
Journal	Applied Surface Science
Volume	511
Early online date	30 Jan 2020
DOIs	https://doi.org/10.1016/j.apsusc.2020.145557
Publication status	Published - 1 May 2020

Bibliographical note

Funding Information:
The authors gratefully acknowledge the financial support received from the Engineering and Physical Sciences Research Council (EPSRC) , UK ( EP/J018252/1 ; EP/F006926/1 ) and the EU H2020 HIMALAIA project (Grant No. 766871 ). One of the authors, B.D., would also like to thank the studentship from the Centre for Doctoral Training in Innovative Metal Processing (IMPaCT) funded by EPSRC, UK (EP/F006926/1).

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

AISI 316L
S phase
active-screen plasma
low-temperature nitriding
pulsed laser texturing
thermal stability
Pulsed laser texturing
Low-temperature nitriding
Active-screen plasma
Thermal stability

ASJC Scopus subject areas

Condensed Matter Physics
Physics and Astronomy(all)
Surfaces, Coatings and Films
Chemistry(all)
Surfaces and Interfaces

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Dashtbozorg_et_al_A_study_on_the_effect_of_ultrashort_pulsed_laser_Applied_Surface_Science_2020Accepted author manuscript, 2.67 MBLicence: Creative Commons: Attribution-NonCommercial-NoDerivs (CC BY-NC-ND)

https://www.sciencedirect.com/science/article/pii/S0169433220303135Licence: None: All rights reserved

Cite this

Dashtbozorg, B., Li, X., Romano, J-M., Garcia Giron, A., Sammons, R., Dimov, S., & Dong, H. (2020). A study on the effect of ultrashort pulsed laser texturing on the microstructure and properties of metastable S phase layer formed on AISI 316L surfaces. Applied Surface Science, 511, 1-13. Article 145557. Advance online publication. https://doi.org/10.1016/j.apsusc.2020.145557

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abstract = "Austenitic stainless steels (ASS) are an important material within the food and medical industries. However, their current limitations of poor wear resistance and susceptibility to bacterial colonisation have limited further uptake. Low-temperature plasma nitriding can address the poor durability of the ASS alloys by forming the S phase, therefore, providing combined improvement in hardness, wear resistance and corrosion resistance. Additionally, pulsed laser texturing can also be used to introduce functional antibacterial textures. However, due to the thermal nature of laser patterning and the thermodynamic metastability of the S phase, almost no research has been conducted thus far on combining the technologies. Therefore, this study for the first time has investigated the response of S phase treated surfaces to ultrashort (nano and femtosecond) laser texturing. The results have shown that, both theoretically and in practice, laser pulses within the nanosecond regime led to the damage of the surface, decomposition of the metastable S phase and loss of the corrosion resistance. In contrast, no change of the S phase surface layer could be detected following femtosecond laser texturing. Hence, demonstrating the feasibility of texturing S phase surfaces using femtosecond pulsed lasers, thus paving the way towards long-lasting multi functional antibacterial stainless steel surfaces.",

keywords = "AISI 316L, S phase, active-screen plasma, low-temperature nitriding, pulsed laser texturing, thermal stability, Pulsed laser texturing, Low-temperature nitriding, Active-screen plasma, Thermal stability",

author = "Behnam Dashtbozorg and Xiaoying Li and Jean-Michel Romano and {Garcia Giron}, Antonio and Rachel Sammons and Stefan Dimov and Hanshan Dong",

note = "Funding Information: The authors gratefully acknowledge the financial support received from the Engineering and Physical Sciences Research Council (EPSRC) , UK ( EP/J018252/1 ; EP/F006926/1 ) and the EU H2020 HIMALAIA project (Grant No. 766871 ). One of the authors, B.D., would also like to thank the studentship from the Centre for Doctoral Training in Innovative Metal Processing (IMPaCT) funded by EPSRC, UK (EP/F006926/1). Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

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AU - Dashtbozorg, Behnam

AU - Li, Xiaoying

AU - Romano, Jean-Michel

AU - Garcia Giron, Antonio

AU - Sammons, Rachel

AU - Dimov, Stefan

AU - Dong, Hanshan

N1 - Funding Information: The authors gratefully acknowledge the financial support received from the Engineering and Physical Sciences Research Council (EPSRC) , UK ( EP/J018252/1 ; EP/F006926/1 ) and the EU H2020 HIMALAIA project (Grant No. 766871 ). One of the authors, B.D., would also like to thank the studentship from the Centre for Doctoral Training in Innovative Metal Processing (IMPaCT) funded by EPSRC, UK (EP/F006926/1). Publisher Copyright: © 2020 Elsevier B.V.

PY - 2020/5/1

Y1 - 2020/5/1

N2 - Austenitic stainless steels (ASS) are an important material within the food and medical industries. However, their current limitations of poor wear resistance and susceptibility to bacterial colonisation have limited further uptake. Low-temperature plasma nitriding can address the poor durability of the ASS alloys by forming the S phase, therefore, providing combined improvement in hardness, wear resistance and corrosion resistance. Additionally, pulsed laser texturing can also be used to introduce functional antibacterial textures. However, due to the thermal nature of laser patterning and the thermodynamic metastability of the S phase, almost no research has been conducted thus far on combining the technologies. Therefore, this study for the first time has investigated the response of S phase treated surfaces to ultrashort (nano and femtosecond) laser texturing. The results have shown that, both theoretically and in practice, laser pulses within the nanosecond regime led to the damage of the surface, decomposition of the metastable S phase and loss of the corrosion resistance. In contrast, no change of the S phase surface layer could be detected following femtosecond laser texturing. Hence, demonstrating the feasibility of texturing S phase surfaces using femtosecond pulsed lasers, thus paving the way towards long-lasting multi functional antibacterial stainless steel surfaces.

AB - Austenitic stainless steels (ASS) are an important material within the food and medical industries. However, their current limitations of poor wear resistance and susceptibility to bacterial colonisation have limited further uptake. Low-temperature plasma nitriding can address the poor durability of the ASS alloys by forming the S phase, therefore, providing combined improvement in hardness, wear resistance and corrosion resistance. Additionally, pulsed laser texturing can also be used to introduce functional antibacterial textures. However, due to the thermal nature of laser patterning and the thermodynamic metastability of the S phase, almost no research has been conducted thus far on combining the technologies. Therefore, this study for the first time has investigated the response of S phase treated surfaces to ultrashort (nano and femtosecond) laser texturing. The results have shown that, both theoretically and in practice, laser pulses within the nanosecond regime led to the damage of the surface, decomposition of the metastable S phase and loss of the corrosion resistance. In contrast, no change of the S phase surface layer could be detected following femtosecond laser texturing. Hence, demonstrating the feasibility of texturing S phase surfaces using femtosecond pulsed lasers, thus paving the way towards long-lasting multi functional antibacterial stainless steel surfaces.

KW - AISI 316L

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KW - thermal stability

KW - Pulsed laser texturing

KW - Low-temperature nitriding

KW - Active-screen plasma

KW - Thermal stability

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JO - Applied Surface Science

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ER -

A study on the effect of ultrashort pulsed laser texturing on the microstructure and properties of metastable S phase layer formed on AISI 316L surfaces

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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