scholarly journals Study of Optical Properties of Surface Layers Produced by Laser Surface Melting and Laser Surface Nitriding of Titanium Alloy

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3112 ◽  
Author(s):  
Aleksander Lisiecki
Keyword(s):  
Titanium Alloy ◽  
Optical Properties ◽  
High Power ◽  
Thermal Conditions ◽  
Surface Melting ◽  
Laser Surface ◽  
Laser Surface Melting ◽  
Surface Layers ◽  
Melt Pool ◽  
Titanium Alloy Ti6al4v

This study measured optical properties, such as specular, diffuse, and total reflection for 808 nm wavelength, characteristic for high power diode lasers radiation, from the surface of titanium alloy Ti6Al4V at delivery conditions, polished, and oxidized. Moreover, the optical properties of surface layers produced by high power direct diode laser (HPDDL) melting and nitriding were determined. Additionally, a methodology for determining the value of absorption for 808 nm wavelength of the HPDDL radiation on the surface of a melt pool during laser surface melting and nitriding of titanium alloy was proposed. The results show that the distinct differences in absorption affect the heat transfer, thermal conditions of laser heating and thereby the penetration depth during laser melting and nitriding of the titanium alloy.

Numerical and experimental study of the temperature field evolution of Mg alloy during high power diode laser surface melting

Optik ◽  
2015 ◽  
Vol 126 (7-8) ◽  
pp. 739-743 ◽  
Author(s):  
Yu Gan ◽  
Wenxian Wang ◽  
Zeqin Cui ◽  
Xinggui Yan ◽  
Zhuosen Guan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Temperature Field ◽  
Diode Laser ◽  
High Power ◽  
Surface Melting ◽  
Laser Surface ◽  
Laser Surface Melting ◽  
Mg Alloy ◽  
Power Diode ◽  
High Power Diode Laser

Microstructural characteristics of cobalt treated by high-speed laser surface melting under high power

2017 ◽  
Vol 128 ◽  
pp. 63-67 ◽  
Author(s):  
Jian Tu ◽  
Kun-Feng Zhou ◽  
Zhi-Ming Zhou ◽  
Can Huang ◽  
Hai-Long Tang
Keyword(s):  
High Power ◽  
High Speed ◽  
Surface Melting ◽  
Laser Surface ◽  
Laser Surface Melting ◽  
Microstructural Characteristics

Effect of high power diode laser surface melting on wear resistance of magnesium alloys

Wear ◽  
2006 ◽  
Vol 260 (1-2) ◽  
pp. 175-180 ◽  
Author(s):  
Ghazanfar Abbas ◽  
Lin Li ◽  
Uzma Ghazanfar ◽  
Zhu Liu
Keyword(s):  
Wear Resistance ◽  
Diode Laser ◽  
Magnesium Alloys ◽  
High Power ◽  
Surface Melting ◽  
Laser Surface ◽  
Laser Surface Melting ◽  
Power Diode ◽  
High Power Diode Laser

METASTABLE PHASES OBTAINED BY HIGH POWER LASER SURFACE MELTING OF CAST-IRON AND STEELS

1983 ◽  
Vol 44 (C5) ◽  
pp. C5-501-C5-505
Author(s):  
E. Ramous ◽  
L. Giordano ◽  
G. Principi ◽  
A. Tiziani
Keyword(s):  
Cast Iron ◽  
High Power ◽  
Surface Melting ◽  
Laser Surface ◽  
Metastable Phases ◽  
Laser Surface Melting ◽  
High Power Laser ◽  
Power Laser

Study of Melt Pool Geometry and Solidification Microstructure during Laser Surface Melting of Inconel 625 Alloy

Optik ◽  
2021 ◽  
pp. 167766
Author(s):  
Jitender K. Chaurasia ◽  
A N Jinoop ◽  
P Parthasarathy ◽  
C.P. Paul ◽  
K.S. Bindra ◽  
...  
Keyword(s):  
Surface Melting ◽  
Laser Surface ◽  
Solidification Microstructure ◽  
Laser Surface Melting ◽  
Inconel 625 ◽  
Melt Pool ◽  
Inconel 625 Alloy

scholarly journals A Steady State Semi-analytical Approximation of Melt Pool Evolution in Pulsed Laser Surface Melting

2021 ◽  
Author(s):  
Utsavkumar Mistry ◽  
Madhu Vadali
Keyword(s):  
Thin Film ◽  
Steady State ◽  
Analytical Solution ◽  
Pulse Duration ◽  
Pulsed Laser ◽  
Surface Melting ◽  
Laser Surface ◽  
Laser Surface Melting ◽  
Surface Geometry ◽  
Melt Pool

Pulsed laser surface melting (pLSM) is a technique that offers an efficient and effective way to modify the geometry surfaces without any addition or removal of material. The resultant surface geometry plays a critical role in several applications. This paper presents a steady-state thin-film approximation of the melt pool created by pLSM and the resulting semi-analytical solution for the evolved surface geometry. These predictions of the semi-analytical solution are then compared with a validated numerical solution. The comparison demonstrates a good match with errors ranging from ~4% to ~25% across several pulse duration. Larger errors are observed at comparatively lower and higher pulse duration, and smaller errors are observed for intermediate pulse duration values. Overall, the thin film solution is a reasonable and useful approximation of the evolved surface geometry through the pLSM process, thus saving significant computational costs.

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