Effect of simultaneous application of ultrasonic vibrations during laser surface melting on electrochemical properties of 2024 aluminum alloy

2017 ◽  
Vol 2 (10) ◽  
pp. 675-678 ◽  
Author(s):  
Sourabh Biswas
Keyword(s):  
Aluminum Alloy ◽  
Electrochemical Properties ◽  
Surface Melting ◽  
Laser Surface ◽  
Laser Surface Melting ◽  
Ultrasonic Vibrations ◽  
2024 Aluminum Alloy ◽  
Simultaneous Application

Laser surface melting of Ti–6Al–4V under the influence of ultrasonic vibrations

2015 ◽  
Vol 159 ◽  
pp. 470-473 ◽  
Author(s):  
Sourabh Biswas ◽  
S. Habib Alavi ◽  
Sandip P. Harimkar
Keyword(s):  
Surface Melting ◽  
Laser Surface ◽  
Laser Surface Melting ◽  
Ultrasonic Vibrations

Nd-YAG Laser Surface Melting of Aluminum Alloy 6013 for Improving Stress Corrosion Cracking Resistance

2010 ◽  
Vol 123-125 ◽  
pp. 1047-1050
Author(s):  
Li Zhang ◽  
Wen Long Xu ◽  
Tai Man Yue
Keyword(s):  
Aluminum Alloy ◽  
Crack Propagation ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Surface Melting ◽  
Corrosion Cracking ◽  
Laser Surface ◽  
Laser Surface Melting ◽  
Yag Laser ◽  
Aln Film

Laser surface melting (LSM) of aluminum alloy 6013 was conducted using a high power Nd-YAG laser under nitrogen gas with the aim of improving the stress corrosion cracking (SCC) resistance of the alloy. The SCC behavior was studied in a 3.5% NaCl solution using a slow strain rate test (SSRT). A laser-melted layer in the order of 500µm thick was produced, which consists of fine dendritic and cellular structures with some Al-Si-Cu-Fe-Mn phase particles formed at interdentritic boundaries. The results of the SSRT test showed that the susceptibility of the alloy to SCC, in terms of total elongation to failure, was decreased after the laser surface modification. This was considered to be attributed to the presence of the laser-formed AlN film, which acted as a barrier to the ingress of the corrosive Cl- into the material and enhanced the pitting resistance of the material. An examination of the fractured surface indicated that the crack propagation path, in the early stage of SCC, was along the tortuous dendrite and cell boundaries. This caused the crack path deviated from the growing direction and resulted in a longer crack length covered before failure thus increasing the overall crack propagation resistance.

Development of Nano-Structured Aluminum Surfaces by LSM

2008 ◽  
Author(s):  
Taha Mattar ◽  
Ehab Abdel Rahman ◽  
Ahmed Abdel-Aziz ◽  
Haytham El-Gazzar
Keyword(s):  
Corrosion Resistance ◽  
Surface Layer ◽  
Surface Structure ◽  
Surface Melting ◽  
Laser Surface ◽  
Laser Surface Melting ◽  
Aluminum Surface ◽  
Yag Laser ◽  
Structured Surface ◽  
Aluminum Surfaces

Aluminum is one of most common metals in all advanced and modern scientific and technological applications including electrical, electronic, chemical, engineering, energy and medical fields. The performance of aluminum alloys determines to large extent the quality and economic status of the different processes. Aluminum surface structure determine its performance where nano sized grains and layer can improve aluminum properties and performance. In this work, the improvement of aluminum surface structure and formation of nano structured surface grains by laser surface melting (LSM) using Nd-YAG laser under argon atmosphere was investigated. Different power and scanning speed were applied. The physical and chemical properties of the produced surfaces were examined. SEM, EDX and XRD analyses were performed and were correlated to hardness results. Corrosion resistance of the treated surface was investigated to evaluate their performance in aggressive media and chemical and medical applications. From the obtained data it can be concluded that Nd-YAG laser surface melting of aluminum results in formation of 750 micron nano-structured surface layer. Adjustment of LSM parameters could produce 100 nm grains or less. The obtained results showed also that LSM under argon can eliminate the formation of Al2O3 surface layer which may deteriorates the performance in certain applications. Surface layer rich in AlN is formed upon LSM. It was concluded also that corrosion resistance of the treated aluminum surfaces was improved to large extent by LSM.

Sign in / Sign up

Export Citation Format

Share Document