The Experts below are selected from a list of 16911 Experts worldwide ranked by ideXlab platform
Jiajie Hu - One of the best experts on this subject based on the ideXlab platform.
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effect of Laser Cladding on wear and damage behaviors of heavy haul wheel rail materials
Wear, 2014Co-Authors: W J Wang, Jiajie HuAbstract:Abstract The objective of this study is to investigate the effect of Laser Cladding coating on wear and damage behaviors of heavy-haul wheel/rail materials by means of a laboratory-scale rolling–sliding wear apparatus. The results indicate that the wheel/rail rollers with Laser Cladding form a uniform and compacted coating without any cracks or stomata. The Laser Cladding coating markedly improves wear-resistance of wheel/rail rollers. The wear mechanism of wheel/rail rollers undergoing Laser Cladding is plowing and abrasive wear. However, the wheel/rail rollers without Laser Cladding exhibit visible adhesion wear and serious spalling damage. Furthermore, there are obvious fatigue cracks in both the surface and subsurface. Excellent wear-resistance of Laser Cladding coating can effectively alleviate surface damage and prolong wear life of heavy-haul wheel/rail. However, further work should be carried out for clarifying the fatigue characteristic of wheel/rail with Laser Cladding coating.
Binshi Xu - One of the best experts on this subject based on the ideXlab platform.
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Progress and Challenges of Ultrasonic Testing for Stress in Remanufacturing Laser Cladding Coating
Materials, 2018Co-Authors: Shiyun Dong, Binshi XuAbstract:Stress in Laser Cladding coating is an important factor affecting the safe operation of remanufacturing components. Ultrasonic testing has become a popular approach in the nondestructive evaluation of stress, because it has the advantages of safety, nondestructiveness, and online detection. This paper provides a review of ultrasonic testing for stress in remanufacturing Laser Cladding coating. It summarizes the recent research outcomes on ultrasonic testing for stress, and analyzes the mechanism of ultrasonic testing for stress. Remanufacturing Laser Cladding coating shows typical anisotropic behaviors. The ultrasonic testing signal in Laser Cladding coating is influenced by many complex factors, such as microstructure, defect, temperature, and surface roughness, among others. At present, ultrasonic testing for stress in Laser Cladding coating can only be done roughly. This paper discusses the active mechanism of micro/macro factors in the reliability of stress measurement, as well as the impact of stress measurement on the quality and safety of remanufacturing components. Based on the discussion, this paper proposes strategies to nondestructively, rapidly, and accurately measure stress in remanufacturing Laser Cladding coating.
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Progresses and Challenges of Ultrasonic Testing for Stress in Remanufacturing Laser Cladding Coating
2018Co-Authors: Shiyun Dong, Binshi XuAbstract:Stess in Laser Cladding coating is an important factor affecting the safe operation of remanufacturing components. Ultrasonic testing has become a hot direction in nondestructive evaluation of stress, because it has the advantages of safety, non-destructive and on-line detection. This paper provides a review of ultrasonic testing for stress in remanufacturing Laser Cladding coating. It summarizes the recent research outcomes on ultrasonic testing for stress, analyzes mechanism of ultrasonic testing for stress. Remanufacturing Laser Cladding coating shows typical anisotropic behaviors, the ultrasonic testing signal in Laser Cladding coating is influenced by many complex factors, such as microstructure, defect, temperature and surface roughness, etc. At present, ultrasonic testing for stress in Laser Cladding coating can only be done roughly. The paper discusses active mechanism of micro / macro factors to the reliability of stress measurement and the impact of stress measurement to the quality and safety of remanufacturing components. Base on the discussion, the paper proposes strategies for acquisition of nondestructive, rapid and accurate measurement of stress in remanufacturing Laser Cladding coating.
W J Wang - One of the best experts on this subject based on the ideXlab platform.
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effect of Laser Cladding on wear and damage behaviors of heavy haul wheel rail materials
Wear, 2014Co-Authors: W J Wang, Jiajie HuAbstract:Abstract The objective of this study is to investigate the effect of Laser Cladding coating on wear and damage behaviors of heavy-haul wheel/rail materials by means of a laboratory-scale rolling–sliding wear apparatus. The results indicate that the wheel/rail rollers with Laser Cladding form a uniform and compacted coating without any cracks or stomata. The Laser Cladding coating markedly improves wear-resistance of wheel/rail rollers. The wear mechanism of wheel/rail rollers undergoing Laser Cladding is plowing and abrasive wear. However, the wheel/rail rollers without Laser Cladding exhibit visible adhesion wear and serious spalling damage. Furthermore, there are obvious fatigue cracks in both the surface and subsurface. Excellent wear-resistance of Laser Cladding coating can effectively alleviate surface damage and prolong wear life of heavy-haul wheel/rail. However, further work should be carried out for clarifying the fatigue characteristic of wheel/rail with Laser Cladding coating.
L Stgeorges - One of the best experts on this subject based on the ideXlab platform.
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development and characterization of composite ni cr wc Laser Cladding
Wear, 2007Co-Authors: L StgeorgesAbstract:Abstract To increase the life of mechanical parts submitted to severe oxidizing and abrasive environments, specific coatings are frequently used. Since two decades, with the rapid development of Lasers, power Lasers have been used to produce high quality coatings. Metal matrix composite (MMC) coatings composed of nickel and tungsten carbides (Ni-WC) are frequently used to solve problems of reduced life under severe abrasive conditions. Comparative abrasive tests between Laser Cladding and conventional hardfacing have been performed following the ASTM G-65 standard test method and noticeable increased life (up to six times) has been obtained for the Laser Cladding. This better resistance to abrasion results from the low dilution and the rapid solidification rate obtained with the Laser Cladding. As a consequence, for MMC coatings reinforced with WC particles, Laser Cladding exhibits higher WC volume content and finer microstructure. For applications where oxidation and abrasion resistances are needed, special metal matrix composite such as nickel–chromium alloy + WC particles have been developed. Nickel chrome matrixes with various WC volume content Claddings have been produced on standard steel. The effects of the process parameters on the Cladding quality are discussed and microstructure observations are presented.
Frank W. Liou - One of the best experts on this subject based on the ideXlab platform.
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Control of Laser Cladding for Rapid Prototyping-A Review
2016Co-Authors: Mallikharjuna R. Boddu, Robert G. Landers, Frank W. LiouAbstract:Lasers have wide–ranging applications in the manufacturing field (e.g., Cladding, welding, cutting, machining, drilling). Extensive work is being conducted to apply Laser Cladding as a Rapid Prototyping (RP) process. In this paper the authors illustrate various principles of Laser Cladding in rapid prototyping. Important process parameters for the control of the Laser Cladding process are discussed as well as the experimental methods adopted, and results obtained by, various authors.
