scholarly journals Tailoring Al–Li Alloy Surface Wettability with a Femtosecond Laser and Its Effect on Bonding Performance

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 995
Author(s):  
Jun Chen ◽  
Yibo Li ◽  
Minghui Huang ◽  
Lei Dong
Keyword(s):  
Femtosecond Laser ◽  
Surface Treatment ◽  
Bonding Strength ◽  
Laser Scanning ◽  
Laser Surface ◽  
Surface Wettability ◽  
Alloy Surface ◽  
Laser Surface Treatment ◽  
Bonding Performance ◽  
Surface Micromorphology

In this study, a femtosecond laser was used to pretreat the surface of the Al–Li alloy, the surface micromorphology, roughness, contact angle, and surface wettability of which were adjusted by changing the laser scanning speed, and the sample was bonded into a single joint with polyether ether ketone (PEEK) adhesive. The mechanism of the laser surface treatment affecting the bonding strength of the Al–Li alloy was explored through tensile and shear experiments. The results indicated that optimizing the laser surface treatment parameters could change the surface roughness and surface micromorphology of the Al–Li alloy, so as to change its surface free energy and bonding strength. Compared with the untreated sample, the bonding strength of the Al–Li alloy increased by 81%, 95%, 107%, 91%, and 78% under the treatment of laser scanning at 25, 20, 15, 10, and 5 mm/s, respectively. As a whole, femtosecond laser etching of the Al–Li alloy surface had an important influence on its wettability and bonding performance.

scholarly journals Nanosecond, picosecond and femtosecond laser surface treatment of magnesium alloy: Role of pulse length

2021 ◽  
pp. 127802
Author(s):  
P. Pou-Álvarez ◽  
A. Riveiro ◽  
X.R. Nóvoa ◽  
M. Fernández-Arias ◽  
J. del Val ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Femtosecond Laser ◽  
Surface Treatment ◽  
Pulse Length ◽  
Laser Surface ◽  
Laser Surface Treatment

scholarly journals The Corrosive Improvement with High Temperature Laser Surface Treatment of AA7075

2021 ◽  
Author(s):  
Ruiming Su ◽  
Lei Wang ◽  
Kaining Wang ◽  
Guanglong Li ◽  
Yingdong Qu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Surface Treatment ◽  
Intergranular Corrosion ◽  
Laser Power ◽  
Laser Scanning ◽  
Laser Surface ◽  
Precipitation Behavior ◽  
Laser Surface Treatment ◽  
Intergranular Cracking

Abstract a recently developed AA7075 was subjected to solid solution, high temperature laser surface treatment and artificial aging. The microstructure evolution and precipitation behavior were examined, and their effects on corrosion behavior and corrosion cracking were analyzed. The results show that the coarse η phase disappears and a large number of smaller η phases are formed after high temperature laser surface treatment. Most of the phases dissolved into Al matrix during solution, a fine η phase precipitated in laser treatment. η′ appeared in the high temperature laser surface treatment samples. It was concluded that reasonable laser scanning power owned the best corrosion resistance, lower intergranular corrosion tendency. Both lower laser scan power and higher scan power samples were susceptible to the intergranular corrosion, and the intergranular cracking was observed. In contrary, the reasonable sample which the laser power is 1000W showed much better corrosion resistance due to the coarsening and separation of grain boundary precipitations.

Laser surface treatment of granite stones

2001 ◽  
Author(s):  
J. Pou ◽  
R. Soto ◽  
C. Trillo ◽  
A. F. Doval ◽  
M. Boutinguiza ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Laser Surface ◽  
Laser Surface Treatment

Ni Content Surface Layer Produced by Laser Surface Treatment on Amorphisable Cu Base Alloy

2010 ◽  
Vol 649 ◽  
pp. 101-106
Author(s):  
Mária Svéda ◽  
Dóra Janovszky ◽  
Kinga Tomolya ◽  
Jenő Sólyom ◽  
Zoltán Kálazi ◽  
...  
Keyword(s):  
Surface Layer ◽  
Surface Treatment ◽  
Laser Cladding ◽  
Base Alloy ◽  
Laser Surface ◽  
Laser Alloying ◽  
Laser Surface Treatment ◽  
Ni Content ◽  
Wide Range ◽  
The Matrix

The aim of our research was to comparatively examine Ni content surface layers on amorphisable Cu base alloy produced by different laser surface treatments. Laser surface treatment (LST) techniques, such as laser surface melting, laser alloying and laser cladding, provide a wide range of interesting solutions for the production of wear and corrosion resistant surfaces. [1,2] With LST techniques, the surface can be: i) coated with a layer of another material by laser cladding, ii) the composition of the matrix can be modified by laser alloying. [3] Two kinds of laser surface treatment technologies were used. In the case of coating-melting technology a Ni content surface layer was first developed by galvanization, and then the Ni content layer was melted together with the matrix. In the case of powder blowing technology Ni3Al powder was blown into the layer melted by laser beam and Argon gas. LST was performed using an impulse mode Nd:YAG laser. The laser power and the interaction time were 2 kW and 20÷60 ms. The characterization of the surface layer microstructure was performed by XRD, scanning electron microscopy and microhardness measurements.

Sign in / Sign up

Export Citation Format

Share Document