Microstructural evolution in the cross section of Ni-based superalloy induced by high power laser shock processing

2021 ◽  
Vol 141 ◽  
pp. 107127
Author(s):  
Jiangdong Cao ◽  
Xueyu Cao ◽  
Bochen Jiang ◽  
Fang Yuan ◽  
Da Yao ◽  
...  
Keyword(s):  
Cross Section ◽  
Microstructural Evolution ◽  
High Power ◽  
Laser Shock ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Shock Processing ◽  
The Cross ◽  
Shock Processing

Characteristics of High Power Laser Shock Waves and Their Cleaning Performance

2019 ◽  
Vol 11 (2) ◽  
pp. 41-46 ◽  
Author(s):  
Tae-Gon Kim ◽  
Young-Sam Yoo ◽  
Il-Ryong Son ◽  
Deoksuk Jang ◽  
Dongsik Kim ◽  
...  
Keyword(s):  
Shock Waves ◽  
High Power ◽  
Laser Shock ◽  
High Power Laser ◽  
Power Laser ◽  
Cleaning Performance

Thermostablity Study on Microstructure and Microhardness of Laser Shock Processed Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si

2011 ◽  
Vol 697-698 ◽  
pp. 440-444 ◽  
Author(s):  
Qi Peng Li ◽  
Ying Hong Li ◽  
W. He ◽  
Yu Qin Li ◽  
Xiang Fan Nie ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Cross Section ◽  
High Strain ◽  
Microscopic Structure ◽  
Laser Shock ◽  
Laser Shock Processing ◽  
Fine Grain ◽  
High Strain Rate Deformation ◽  
The Usa ◽  
Shock Processing

In this paper, the microstructure and microhardness of laser shock processed (LSP) Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si titanium alloy with and without annealing were examined and compared. The titanium alloy samples were LSP processed with 3 layers at 4.24GW/cm2. Some of the samples were vacuum annealed at 623K for 10 hours. The microscopic structure with and without annealing were tested and analyzed by SEM, TEM. The results indicated that after LSP, the shock wave provided high strain rate deformation and led to the formation of ultra-fine grain. Comparing with the samples without annealing, the dislocation density was lower and the grain-boundary was more distinct in the annealed samples, but the sizes of the ultra-fine grain didn’t grow bigger after annealing. On the other hand, the microhardness measurement was made on the cross-section. It is obviously that the laser shock processing improved the microhardness of the Ti-6Al-2.5Mo-1.5Cr-0.5Fe-0.3Si for about 12.2% at the surface, and the hardness affected depth is about 500 microns. The microhardness after annealing is 10 HV0.5lower, but the affected depth is not changed. The titanium alloy after LSP is thermostable at 623K; thus break the USA standard AMS2546, in which titanium parts after LSP are subjected in subsequent processing should not exceed 589K.

scholarly journals High Power Laser Developments with Femtosecond to Nanosecond Pulse Durations for Laser Shock Science and Engineering

2014 ◽  
Vol 42 (6) ◽  
pp. 441
Author(s):  
Hiromitsu KIRIYAMA ◽  
Michiaki MORI ◽  
Masayuki SUZUKI ◽  
Izuru DAITO ◽  
Hajime OKADA ◽  
...  
Keyword(s):  
High Power ◽  
Nanosecond Pulse ◽  
Laser Shock ◽  
High Power Laser ◽  
Power Laser ◽  
Science And Engineering

scholarly journals Toward the Fusion of High-Power Laser Shock and Material Sciences

2020 ◽  
Vol 30 (3) ◽  
pp. 216-224
Author(s):  
Norimasa OZAKI ◽  
Kento KATAGIRI ◽  
Yoshinori TANGE ◽  
Kohei MIYANISHI ◽  
Kei-ichi SUEDA ◽  
...  
Keyword(s):  
High Power ◽  
Laser Shock ◽  
High Power Laser ◽  
Power Laser ◽  
Material Sciences

Microstructural evolution in high power laser cladding of Stellite 6+WC layers

2002 ◽  
Vol 157 (2-3) ◽  
pp. 128-137 ◽  
Author(s):  
Minlin Zhong ◽  
Wenjin Liu ◽  
Kefu Yao ◽  
Jean-Claude Goussain ◽  
Cécile Mayer ◽  
...  
Keyword(s):  
Laser Cladding ◽  
Microstructural Evolution ◽  
High Power ◽  
High Power Laser ◽  
Power Laser ◽  
Stellite 6

High-power laser shock-induced dynamic fragmentation of iron foils

2010 ◽  
Vol 82 (17) ◽  
Author(s):  
G. Morard ◽  
T. de Rességuier ◽  
T. Vinci ◽  
A. Benuzzi-Mounaix ◽  
E. Lescoute ◽  
...  
Keyword(s):  
High Power ◽  
Laser Shock ◽  
High Power Laser ◽  
Power Laser ◽  
Dynamic Fragmentation

Effect of Laser Glazing and Laser Shock Peening on Tribological Performance of 1080 Carbon Steel

2004 ◽  
Author(s):  
Saud Aldajah ◽  
Oyelayo O. Ajayi ◽  
George R. Fenske ◽  
Claude B. Reed ◽  
Zhiyue Xu
Keyword(s):  
Carbon Steel ◽  
High Power ◽  
Friction Reduction ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
High Power Laser ◽  
Laser Glazing ◽  
Power Laser ◽  
Microstructure And Properties ◽  
Shock Peening

High-power laser surface treatments in the form of glazing, shock peening, cladding, and alloying can significantly affect material tribology. In this paper, effects of laser glazing, laser shock peening, and their combination on the tribological behavior of 1080 carbon steel were investigated. Laser glazing is a process in which a high-power laser beam melts the top layer of the surface, followed by rapid cooling and resolidification. This results in a new surface layer microstructure and properties. Laser shock peening, on the other hand, is a mechanical process in which a laser generates pressure pulses on the surface of the metal, similar to shot peening. Five conditions were evaluated: untreated (baseline), laser shock peened only (PO), laser-glazed only (GO), laser-glazed then shock peened last (GFPL), and laser shock peened then glazed last (PFGL). In pin-on-disc testing, all laser-treated surfaces reduced dry friction, with the GFPL surface having maximum friction reduction of 43%. Under lubricated conditions, all laser-treated surfaces except the PO sample lowered friction. Similarly, all glazed samples reduced wear by a factor of 2–3, while the PO sample did not change wear significantly. These tribological results are associated with changes in the near-surface microstructure and properties.

scholarly journals High-power laser shock-induced dynamic fracture of aluminum and microscopic observation of samples

2015 ◽  
Vol 94 ◽  
pp. 02008
Author(s):  
Zhang Fan ◽  
Huang Xiuguang ◽  
Shu Hua ◽  
Xiao Dawu ◽  
He Lifeng ◽  
...  
Keyword(s):  
Dynamic Fracture ◽  
High Power ◽  
Microscopic Observation ◽  
Laser Shock ◽  
High Power Laser ◽  
Power Laser
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