Effect of laser shock peening on electrochemical corrosion resistance of IN718 superalloy

2018 ◽  
Vol 57 (10) ◽  
pp. 2467 ◽  
Author(s):  
Chengyi Ning ◽  
Guangyi Zhang ◽  
Yapeng Yang ◽  
Wenwu Zhang
Keyword(s):  
Corrosion Resistance ◽  
Electrochemical Corrosion ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
In718 Superalloy ◽  
Shock Peening ◽  
Electrochemical Corrosion Resistance

Effect of Laser Shock Peening on Electrochemical Corrosion Resistance of 2024 Aluminum Alloy

2016 ◽  
Author(s):  
Hao Wang ◽  
Yihui Huang ◽  
Zhenying Du ◽  
Wenwu Zhang ◽  
Mengxue Bi
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Corrosion Rate ◽  
Electrochemical Corrosion ◽  
Laser Shock Peening ◽  
Electrochemical Technique ◽  
Laser Shock ◽  
2024 Aluminum Alloy ◽  
Shock Peening ◽  
Electrochemical Corrosion Resistance

Laser shock peening is an innovation technique due to its significant improvement on the corrosion resistance of metallic materials. The study describes the effect of laser shock peening with multiple LSP impacts on the corrosion resistance of 2024 aluminum alloy in NaCl water solution with a mass fraction of 3.5% by using electrochemical technique. The experimental results reveal that LSP significantly reduces the corrosion rate of 2024 aluminum alloy, and as the number of impacts increases the corrosion rate decreases. The study demonstrates that LSP is an effective method to improve the electrochemical corrosion resistance of 2024 aluminum alloy.

scholarly journals Post-Processing Techniques to Enhance the Quality of Metallic Parts Produced by Additive Manufacturing

Metals ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 77
Author(s):  
Muhammad Arif Mahmood ◽  
Diana Chioibasu ◽  
Asif Ur Rehman ◽  
Sabin Mihai ◽  
Andrei C. Popescu
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Post Processing ◽  
Laser Polishing ◽  
Shock Peening ◽  
Processing Techniques ◽  
Am Processes ◽  
Conventional Machining

Additive manufacturing (AM) processes can produce three-dimensional (3D) near-net-shape parts based on computer-aided design (CAD) models. Compared to traditional manufacturing processes, AM processes can generate parts with intricate geometries, operational flexibility and reduced manufacturing time, thus saving time and money. On the other hand, AM processes face complex issues, including poor surface finish, unwanted microstructure phases, defects, wear tracks, reduced corrosion resistance and reduced fatigue life. These problems prevent AM parts from real-time operational applications. Post-processing techniques, including laser shock peening, laser polishing, conventional machining methods and thermal processes, are usually applied to resolve these issues. These processes have proved their capability to enhance the surface characteristics and physical and mechanical properties. In this study, various post-processing techniques and their implementations have been compiled. The effect of post-processing techniques on additively manufactured parts has been discussed. It was found that laser shock peening (LSP) can cause severe strain rate generation, especially in thinner components. LSP can control the surface regularities and local grain refinement, thus elevating the hardness value. Laser polishing (LP) can reduce surface roughness up to 95% and increase hardness, collectively, compared to the as-built parts. Conventional machining processes enhance surface quality; however, their influence on hardness has not been proved yet. Thermal post-processing techniques are applied to eliminate porosity up to 99.99%, increase corrosion resistance, and finally, the mechanical properties’ elevation. For future perspectives, to prescribe a particular post-processing technique for specific defects, standardization is necessary. This study provides a detailed overview of the post-processing techniques applied to enhance the mechanical and physical properties of AM-ed parts. A particular method can be chosen based on one’s requirements.

scholarly journals Corrosion Behavior of NiTi Alloys Fabricate by Selective Laser Melting Subjected to Femtosecond Laser Shock Peening

Coatings ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1078
Author(s):  
Long Ma ◽  
Wanqing Li ◽  
Yongzhi Yang ◽  
Yuanxue Ma ◽  
Kai Luo ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Femtosecond Laser ◽  
Selective Laser Melting ◽  
Niti Alloy ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Laser Melting ◽  
Corrosion Failure ◽  
Niti Alloys ◽  
Shock Peening

NiTi alloys are commonly used in many fields such as aerospace, mechanical engineering due to their excellent mechanical properties and shape memory effect. In recent years, the emergence of selective laser melting (SLM) technology provides a new method for the preparation of NiTi parts. But the surface corrosion failure of SLM-NiTi is the most common problem. This paper mainly focuses on the research of femtosecond laser shock peening of the surface of SLM-NiTi alloy to improve the corrosion resistance. Selecting different scanning space (1 μm, 3 μm, 5 μm, 10 μm), and analyze the surface morphology of the material through the OM, SEM, EDS and white light interferometer, and investigate the surface nanohardness and corrosion resistance through nanoindentation and electrochemical testing. The research results show that part of the TiO2 is formed under different scanning spaces, and part of NiO is formed when the scanning space is 1μm. At the same time, it is found that the sample under the condition of 10 μm has the most excellent corrosion resistance and nanohardness. The nanohardness reaches 1303 ± 40 HV and the corrosion current density reaches 1.45 ± 0.1 × 10−9 A·cm−2. Proper femtosecond laser treatment can effectively improve the surface strength and corrosion resistance of the NiTi alloys.

Corrosion Resistance Property of 316L Stainless Steel Welding Joints Treated by Laser Shock Peening

2017 ◽  
Vol 54 (6) ◽  
pp. 061402
Author(s):  
李玉琴 Li Yuqin ◽  
孟长军 Meng Changjun ◽  
王学德 Wang Xuede ◽  
罗思海 Luo Sihai ◽  
徐伟胜 Xu Weisheng
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
316L Stainless Steel ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Stainless Steel Welding ◽  
Resistance Property ◽  
Corrosion Resistance Property ◽  
Welding Joints ◽  
Shock Peening
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