EPMA microanalysis of recast layers produced during laser drilling of type 305 stainless steel

X. Y. Wang; G. K L Ng; Z. Liu; L. Li; L. Bradley

doi:10.1016/j.tsf.2003.11.158

EPMA microanalysis of recast layers produced during laser drilling of type 305 stainless steel

X. Y. Wang, G. K L Ng, Z. Liu, L. Li, L. Bradley

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

Abstract

It is fundamentally important to understand the microstructure of the recast layer and its effect on the properties of the drilled holes. In this work, laser drilling for machining small orifices in type 305 stainless steel was carried out using a pulsed Nd:YAG laser with oxygen, argon and nitrogen as assist gases, respectively. In addition to scanning electron microscopy, electron probe microanalysis was specially used to examine the elemental distributions of the recast layers in the laser-drilled holes. It was found that the microstructural morphologies of the recast layers were independent of the assist gases; characterised by a columnar structure of dendrites composed of austenite probably with minor phase of delta-ferrite in the interdendritic regions. However, the nitrogen contents increased in the recast layers in order of oxygen, argon and nitrogen as the assist gases. This was in good agreement with the corrosion performance of the recast layers assessed by electrochemical polarisation testing. © 2003 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	84-88
Number of pages	4
Journal	Thin Solid Films
Volume	453-454
DOIs	https://doi.org/10.1016/j.tsf.2003.11.158
Publication status	Published - 1 Apr 2004

Keywords

Electron probe microanalysis
Laser irradiation
Recast layer
Stainless steel

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10.1016/j.tsf.2003.11.158

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title = "EPMA microanalysis of recast layers produced during laser drilling of type 305 stainless steel",

abstract = "It is fundamentally important to understand the microstructure of the recast layer and its effect on the properties of the drilled holes. In this work, laser drilling for machining small orifices in type 305 stainless steel was carried out using a pulsed Nd:YAG laser with oxygen, argon and nitrogen as assist gases, respectively. In addition to scanning electron microscopy, electron probe microanalysis was specially used to examine the elemental distributions of the recast layers in the laser-drilled holes. It was found that the microstructural morphologies of the recast layers were independent of the assist gases; characterised by a columnar structure of dendrites composed of austenite probably with minor phase of delta-ferrite in the interdendritic regions. However, the nitrogen contents increased in the recast layers in order of oxygen, argon and nitrogen as the assist gases. This was in good agreement with the corrosion performance of the recast layers assessed by electrochemical polarisation testing. {\textcopyright} 2003 Elsevier B.V. All rights reserved.",

keywords = "Electron probe microanalysis, Laser irradiation, Recast layer, Stainless steel",

author = "Wang, \{X. Y.\} and Ng, \{G. K L\} and Z. Liu and L. Li and L. Bradley",

year = "2004",

month = apr,

day = "1",

doi = "10.1016/j.tsf.2003.11.158",

language = "English",

volume = "453-454",

pages = "84--88",

journal = "Thin Solid Films",

publisher = "Elsevier BV",

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TY - JOUR

T1 - EPMA microanalysis of recast layers produced during laser drilling of type 305 stainless steel

AU - Wang, X. Y.

AU - Ng, G. K L

AU - Liu, Z.

AU - Li, L.

AU - Bradley, L.

PY - 2004/4/1

Y1 - 2004/4/1

N2 - It is fundamentally important to understand the microstructure of the recast layer and its effect on the properties of the drilled holes. In this work, laser drilling for machining small orifices in type 305 stainless steel was carried out using a pulsed Nd:YAG laser with oxygen, argon and nitrogen as assist gases, respectively. In addition to scanning electron microscopy, electron probe microanalysis was specially used to examine the elemental distributions of the recast layers in the laser-drilled holes. It was found that the microstructural morphologies of the recast layers were independent of the assist gases; characterised by a columnar structure of dendrites composed of austenite probably with minor phase of delta-ferrite in the interdendritic regions. However, the nitrogen contents increased in the recast layers in order of oxygen, argon and nitrogen as the assist gases. This was in good agreement with the corrosion performance of the recast layers assessed by electrochemical polarisation testing. © 2003 Elsevier B.V. All rights reserved.

AB - It is fundamentally important to understand the microstructure of the recast layer and its effect on the properties of the drilled holes. In this work, laser drilling for machining small orifices in type 305 stainless steel was carried out using a pulsed Nd:YAG laser with oxygen, argon and nitrogen as assist gases, respectively. In addition to scanning electron microscopy, electron probe microanalysis was specially used to examine the elemental distributions of the recast layers in the laser-drilled holes. It was found that the microstructural morphologies of the recast layers were independent of the assist gases; characterised by a columnar structure of dendrites composed of austenite probably with minor phase of delta-ferrite in the interdendritic regions. However, the nitrogen contents increased in the recast layers in order of oxygen, argon and nitrogen as the assist gases. This was in good agreement with the corrosion performance of the recast layers assessed by electrochemical polarisation testing. © 2003 Elsevier B.V. All rights reserved.

KW - Electron probe microanalysis

KW - Laser irradiation

KW - Recast layer

KW - Stainless steel

UR - https://www.scopus.com/pages/publications/1542426454

U2 - 10.1016/j.tsf.2003.11.158

DO - 10.1016/j.tsf.2003.11.158

M3 - Article

VL - 453-454

SP - 84

EP - 88

JO - Thin Solid Films

JF - Thin Solid Films

ER -

EPMA microanalysis of recast layers produced during laser drilling of type 305 stainless steel

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EPMA microanalysis of recast layers produced during laser drilling of type 305 stainless steel

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