Analysis of dissolved titanium concentration and phase transformation in molten Al Ti alloy using laser-induced breakdown spectroscopy

Leósson, Kristján; Padamata, Sai Krishna; Meirbekova, Rauan; Sævarsdóttir, Guðrún; Gudmundsson, Sveinn Hinrik

doi:10.1016/j.sab.2022.106387

Cited by 9 publications

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The electron density of the plasma, n e , was determined by analyzing the width of the Al(II) peak at 281.62 nm, corrected for instrument broadening as previously described. 23 Using the electron density as input to the Saha-Boltzmann equation, 21 the plasma temperature, T p , was estimated from the ratio of the 281.62 nm Al(II) and the 305.0072 nm Al(I) peaks under the assumption of optically thin conditions (the validity of this assumption is supported by the fact that the upper-level energies of these transitions are 11.82 and 7.67 eV, respectively). For 15 solid samples with varying Mg concentration, the value of T p was found to be constant to within 10 300 ± 100 K, with n e = (5.9 ± 0.7) × 10 16 cm −3 .…”

Section: Magnesium Emissionmentioning

confidence: 99%

Vapor-Phase Contribution to Laser-Induced Plasma Emission of Magnesium in Liquid Aluminum

Thorarinsdottir,

Maghsoudi,

Leosson

2023

Appl Spectrosc

Self Cite

View full text Add to dashboard Cite

Liquid aluminum containing the important alloying element magnesium in varying concentrations was analyzed using in-situ laser-induced breakdown spectroscopy (LIBS). Magnesium emission shows an exponential dependence on melt temperature that correlates well with the expected partial pressure of magnesium above the aluminum melt. Furthermore, comparison with LIBS measurements on corresponding solid samples supports the conclusion that a significant part of Mg emission from liquid metal samples originates from the vapor phase above the metal surface. Simultaneously, curves of growth measured over four orders of magnitude in Mg concentration reveal a level of self-absorption for liquid aluminum samples that is stronger than for solid aluminum samples having a corresponding Mg concentration, and beyond what is expected from conventional plasma models. The implications for measurements of volatile species in liquid metals in general are discussed.

show abstract

Section: Magnesium Emissionmentioning

confidence: 99%

Vapor-Phase Contribution to Laser-Induced Plasma Emission of Magnesium in Liquid Aluminum

Thorarinsdottir,

Maghsoudi,

Leosson

2023

Appl Spectrosc

Self Cite

View full text Add to dashboard Cite

show abstract

“…An “at production line” application of LIBS was described by Leosson et al who used it to monitor the Ti concentration and the phase transformations occurring in molten Ti–Al alloy. 54 Such on-line applications are of course, hugely beneficial in that they can help identify end points of reactions, saving time and money for industry by enabling adjustments to preparation procedures to be made in real time etc. At temperatures above the liquidus of the material, the Ti concentration was constant, but below the liquidus the concentration obeyed that expected from the phase diagram.…”

Section: Metalsmentioning

confidence: 99%