Effect of surface topography in the characterization of stainless steel using laser-induced breakdown spectrometry

Cabalı́n, L.M.; Romero, D.; Baena, J. M.; Laserna, J.J.

doi:10.1002/(sici)1096-9918(199909)27:9<805::aid-sia576>3.0.co;2-k

Cited by 31 publications

(10 citation statements)

References 22 publications

(13 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The resulted actual interaction time between laser and material surface during processing was decreased as the overlap decreased at constant peak power and PRF. Low PRFs tend to produce high pulse energies which roughened the surface at prolonged exposure to the laser energy [8,9]. This explanation supports the surface roughness decreased with increasing PRF and decreasing residence time.…”

Section: Resultssupporting

confidence: 65%

“…In pulse laser surface processing, the laser modified surface mechanical and physical properties were controlled by several independent laser parameters namely; peak power, duty cycle, PRF and traverse speed [1,2]. The pulse energy and laser-surface interaction time determined the temperature profile and also increased both width and depth of hardened surface [3].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Designing Pulse Laser Surface Modification of H13 Steel Using Response Surface Method

Aqida¹,

Brabazon²,

Naher³

2011

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. This paper presents a design of experiment (DOE) for laser surface modification process of AISI H13 tool steel in achieving the maximum hardness and minimum surface roughness at a range of modified layer depth. A Rofin DC-015 diffusion-cooled CO 2 slab laser was used to process AISI H13 tool steel samples. Samples of 10 mm diameter were sectioned to 100 mm length in order to process a predefined circumferential area. The parameters selected for examination were laser peak power, overlap percentage and pulse repetition frequency (PRF). The response surface method with Box-Behnken design approach in Design Expert 7 software was used to design the H13 laser surface modification process. Metallographic study and image analysis were done to measure the modified layer depth. The modified surface roughness was measured using two-dimensional surface profilometer. The correlation of the three laser processing parameters and the modified surface properties was specified by plotting three-dimensional graph. The hardness properties were tested at 981 mN force. From metallographic study, the laser modified surface depth was between 37 µm and 150 µm. The average surface roughness recorded from the 2D profilometry was at a minimum value of 1.8 µm. The maximum hardness achieved was between 728 and 905 HV 0.1 .These findings are significant to modern development of hard coatings for wear resistant applications.

show abstract

Section: Resultssupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Designing Pulse Laser Surface Modification of H13 Steel Using Response Surface Method

Aqida¹,

Brabazon²,

Naher³

2011

AIP Conference Proceedings

View full text Add to dashboard Cite

show abstract

“…Increasing both the number of pulses and the duty cycle increased the material-laser interaction time which leads to higher laser energy absorption [4,5]. When more laser energy was absorbed the surface temperature increased and formed irregular geometries which increased the surface roughness [1,17]. A lower range of surface roughness was recorded in samples processed with 0.2 mm spot size compared to samples produced at 0.4 mm spot size.…”

Section: Surface Roughnessmentioning

confidence: 99%

“…The effect of surface roughness on component precision has been found to be strongly dependent on the laser beam energy [1]. The beam energy can be controlled by varying laser irradiance, number of pulses or pulse repetition frequency, and pulse duration.…”

Section: Introductionmentioning

confidence: 99%

Laser Surface Modification of H13 Die Steel using Different Laser Spot Sizes

Aqida¹,

Naher²,

Brabazon³

2011

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. This paper presents a laser surface modification process of AISI H13 tool steel using three sizes of laser spot with an aim to achieve reduced grain size and surface roughness. A Rofin DC-015 diffusion-cooled CO 2 slab laser was used to process AISI H13 tool steel samples. Samples of 10 mm diameter were sectioned to 100 mm length in order to process a predefined circumferential area. The parameters selected for examination were laser peak power, overlap percentage and pulse repetition frequency (PRF). Metallographic study and image analysis were done to measure the grain size and the modified surface roughness was measured using two-dimensional surface profilometer. From metallographic study, the smallest grain sizes measured by laser modified surface were between 0.51 µm and 2.54 µm. The minimum surface roughness, R a , recorded was 3.0 µm. This surface roughness of the modified die steel is similar to the surface quality of cast products. The grain size correlation with hardness followed the findings correlate with Hall-Petch relationship. The potential found for increase in surface hardness represents an important method to sustain tooling life.

show abstract

“…They included the study of the effect of focusing distance and laser-pulse energy on accuracy and limit of detection [16,17], the influence of sample surface topography [18,19] on spectral emission and analytical precision, the observation of plasma in a low-pressure atmosphere [20,21] and the application of double-pulse excitation to increase the removal material and, consequently, to improve the limit of detection [21,22,23,24].…”

Section: Introductionmentioning

confidence: 99%

Time-resolved laser-induced plasma spectrometry for determination of minor elements in steelmaking process samples

Romero

et al. 2002

Analytical and Bioanalytical Chemistry

View full text Add to dashboard Cite

A pulsed Nd:YAG laser operating on the fourth (266 nm) and second (532 nm) harmonics has been used to generate plasmas on the target surface in air at atmospheric pressure. The influence of wavelength on quantitative analysis of 4 minor elements in stainless steel samples (Si, Ti, Nb and Mo) was investigated. Stainless steel samples with different elemental concentrations were prepared and analyzed by laser-induced plasma spectrometry (LIPS). The effect of laser wavelength on analytical figures of merit (calibration curves, correlation coefficients, linear dynamic ranges, analytical precision, and accuracy values) was found to be negligible when internal standardization (an Fe line) and time-resolved laser-induced plasma are employed. For both wavelengths, the calibration curves presented a good linearity and an acceptable linear dynamic range in the concentration interval investigated. For the four elements studied, limits of detection lower than 150 microg g(-1) were achieved. To evaluate the influence of wavelength on precision and accuracy, a set of fifteen high-alloyed steel samples from different stages of steelmaking process have been analyzed. Finally, the long-term stability of the analytical measurements for Mo with 532 nm wavelength has been discussed. RSD values were lower than 5.3% for the elements studied.

show abstract

Effect of surface topography in the characterization of stainless steel using laser-induced breakdown spectrometry

Cited by 31 publications

References 22 publications

Designing Pulse Laser Surface Modification of H13 Steel Using Response Surface Method

Designing Pulse Laser Surface Modification of H13 Steel Using Response Surface Method

Laser Surface Modification of H13 Die Steel using Different Laser Spot Sizes

Time-resolved laser-induced plasma spectrometry for determination of minor elements in steelmaking process samples

Contact Info

Product

Resources

About