The Surface Temperature of Metals Heated with Laser

Namba, Susumu; Kim, Pil Hyon; Nakayama, Satosi; Ida, Ichiro

doi:10.1143/jjap.4.153

Cited by 19 publications

(3 citation statements)

References 2 publications

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“…Scientists in the United States then started to study the absorption and hardening of a graphite-coated metal surface irradiated with a ruby laser beam. (5) Researchers in the United States and Japan (6,7) also began to examine the heat treatment ability of lasers on metal surfaces by observing their austenitization and to study the effects of laser heat treatment on alloys. In 1965, the Nd:YAG laser was the first industrial use of this technology to repair connectors inside assembled television tubes.…”

Section: Introductionmentioning

confidence: 99%

Tempering Effects of Multitrack Laser Surface Heat Treatment of AISI 1045 Steel

Kung¹,

Shih²,

Hsu³

et al. 2019

Sensors and Materials

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A thermo-elastic-plastic finite element model was employed to simulate and analyze the effects of high-power parameters on the laser heat treatment of AISI 1045 steel. Tempering effects of multitrack laser heat treatment using various process parameters-laser power, laser feed rate, laser overlap rate, and laser spot size-were analyzed to estimate the distribution of a hardening layer on the steel surface. Numerical simulation results indicated that the proposed finite element model is effective in analyzing the laser heat treatment of the steel surface and calculating the possibility of decreases in steel hardness due to tempering effects, enabling it to undergo rapid temperature increases and decreases.

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Section: Introductionmentioning

confidence: 99%

Tempering Effects of Multitrack Laser Surface Heat Treatment of AISI 1045 Steel

Kung¹,

Shih²,

Hsu³

et al. 2019

Sensors and Materials

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show abstract

“…4,5,7,8 Some methods that have been employed, albeit not all, are in situ. The techniques include the use of interference of reflected light, 19 x-ray diffraction, 20 coherent Raman line shift spectroscopy, 21 thermionic emission, 22 time of flight, 23 ellipsometry, 24 and electron diffraction if crystalline phases are present, 25 and pyrometry. 26 Notwithstanding these techniques, we recently published a noncontact in situ approach that tracks the change in local temperature near a fusing/sintering zone.…”

Section: Introductionmentioning

confidence: 99%

Utility of optical heterodyne displacement sensing and laser ultrasonics as in situ process control diagnostic for additive manufacturing

Manzo

Helvajian

2018

Opt. Eng.

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“…The nature of the interaction of focused laser radiation with solid materials and their resulting vapor plasmas have also been investigated. These studies, however, have been primarily concerned with the physics of rapid absorption of laser energy in condensed media (77-20), thermal distribution and equilibration at the surface (79, [21][22][23][24], and the equations of state of the gas dynamics which describe the evolution, expansion, and properties of the plasmas generated by the ejection of atoms, ions, and electrons from the target (77-79, 27,25).…”

mentioning

confidence: 99%

Effect of atmosphere on spectral emission from plasmas generated by the laser microprobe

Treytl¹,

Marich²,

Orenberg³

et al. 1971

Anal. Chem.

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Uranium-1" 1.6 2.3 1.5 Uranium-2C 2.5 2.5 2.2 Uranium Alloy-1d 33 31 30 33 Uranium Alloy-2d 32 28 28 27 Uranium Alloy-3d 2.3 2.0 2.4 2.0 Uranium Alloy-4d 3.0 2.9 2.4 2,2" Extraction temperature 1000 °C. 6 Each sample was cut from an adjacent position along a '/«-inch by 1/e-inch rod.c Uranium specimens were from different billets of high-purity derby uranium.d Uranium alloy specimens were from different batches of similar materials except uranium alloys 3 and 4 had been vacuumheat treated.Some hydrogen determinations for titanium, uranium, and uranium alloys were performed. Tables I and II demonstrate the precision of the instrument when used as a routine analytical device. During these analyses, the samples were de-greased in acetone, and the samples were allowed to accumulate in the furnace chamber until all eight samples were analyzed. Samples from a given specimen were analyzed on two different days in order to demonstrate the stability of the instrument. CONCLUSIONSThe instrument described in this article has been satisfactory for the determination of hydrogen in metals over the concentration range from 0.01 wppm to 100 wppm with a precision of 10%. Diffusion parameters, surface reactions, and the distribution of hydrogen in the sample can be evaluated using the hydrogen evolution rate data and the thermal history of the sample after it is dropped into the furnace.Micromole quantities of other gases can also be determined; thus, the instrument can be used to study a great variety of thermally activated gas evolution processes.

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The Surface Temperature of Metals Heated with Laser

Cited by 19 publications

References 2 publications

Tempering Effects of Multitrack Laser Surface Heat Treatment of AISI 1045 Steel

Tempering Effects of Multitrack Laser Surface Heat Treatment of AISI 1045 Steel

Utility of optical heterodyne displacement sensing and laser ultrasonics as in situ process control diagnostic for additive manufacturing

Effect of atmosphere on spectral emission from plasmas generated by the laser microprobe

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