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Laser Cladding

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (15 March 2017) | Viewed by 11449

Special Issue Editor


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Guest Editor
Instituto Superior Técnico (IST), University of Lisbon, Ave Rovisco Pais, P-1049001 Lisbon, Portugal
Interests: laser materials processing; laser deposition; laser cladding; ultrafast laser materials processing; surface engineering; laser surface treatment; tribology

Special Issue Information

Dear Colleagues,

Laser cladding, a laser-assisted material deposition method initially developed as a coating process in the late 1980s, is currently undergoing a rapid evolution, due to its capability of producing coatings with unique characteristics as well as its potential application as a rapid manufacturing process. Laser cladding allows deposition of a wide variety of metallic and composite materials onto almost any substrate, to produce coatings with outstanding surface properties and negligible degradation of the substrate material. It also allows manufacturing of three-dimensional objects with a wide variety of shapes and dimensions, from the microscale to very large dimensions, using a wide-range of materials. The applications are varied: from bioimplants to the production and repair of single-crystal components for aerospace applications, and new materials development by combinatorial methods.

In this Special Issue, we aim to publish cutting-edge scientific papers on new process developments, both for coating and for rapid-manufacturing applications, process hardware and software developments, real-time adaptive process control, process modelling and simulation, microstructure formation mechanisms and microstructure–properties relationships in laser deposited materials, and process applications.

Prof. Dr. Rui Vilar
Guest Editor

Manuscript Submission Information

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Keywords

  • Laser cladding
  • Blown powder laser cladding
  • Wire laser cladding
  • Laser hardfacing
  • Laser powder deposition
  • Laser-assisted additive manufacturing
  • LENS (Laser Engineered Net Shaping)
  • Directed energy deposition
  • Laser metal deposition
  • Laser metal printing
  • Laser microcladding
  • Laser microdeposition

Published Papers (2 papers)

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Research

9613 KiB  
Article
Laser Cladding of Ultra-Thin Nickel-Based Superalloy Sheets
by Tobias Gabriel, Daniel Rommel, Florian Scherm, Marek Gorywoda and Uwe Glatzel
Materials 2017, 10(3), 279; https://doi.org/10.3390/ma10030279 - 10 Mar 2017
Cited by 19 | Viewed by 5892
Abstract
Laser cladding is a well-established process to apply coatings on metals. However, on substrates considerably thinner than 1 mm it is only rarely described in the literature. In this work 200 µm thin sheets of nickel-based superalloy 718 are coated with a powder [...] Read more.
Laser cladding is a well-established process to apply coatings on metals. However, on substrates considerably thinner than 1 mm it is only rarely described in the literature. In this work 200 µm thin sheets of nickel-based superalloy 718 are coated with a powder of a cobalt-based alloy, Co–28Cr–9W–1.5Si, by laser cladding. The process window is very narrow, therefore, a precisely controlled Yb fiber laser was used. To minimize the input of energy into the substrate, lines were deposited by setting single overlapping points. In a design of experiments (DoE) study, the process parameters of laser power, laser spot area, step size, exposure time, and solidification time were varied and optimized by examining the clad width, weld penetration, and alloying depth. The microstructure of the samples was investigated by optical microscope (OM) and scanning electron microscopy (SEM), combined with electron backscatter diffraction (EBSD) and energy dispersive X-ray spectroscopy (EDX). Similarly to laser cladding of thicker substrates, the laser power shows the highest influence on the resulting clad. With a higher laser power, the clad width and alloying depth increase, and with a larger laser spot area the weld penetration decreases. If the process parameters are controlled precisely, laser cladding of such thin sheets is manageable. Full article
(This article belongs to the Special Issue Laser Cladding)
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11690 KiB  
Article
Cr13Ni5Si2-Based Composite Coating on Copper Deposited Using Pulse Laser Induction Cladding
by Ke Wang, Hailin Wang, Guangzhi Zhu and Xiao Zhu
Materials 2017, 10(2), 160; https://doi.org/10.3390/ma10020160 - 10 Feb 2017
Cited by 13 | Viewed by 4726
Abstract
A Cr13Ni5Si2-based composite coating was successfully deposited on copper by pulse laser induction hybrid cladding (PLIC), and its high-temperature wear behavior was investigated. Temperature evolutions associated with crack behaviors in PLIC were analyzed and compared with pulse laser cladding (PLC) using the finite [...] Read more.
A Cr13Ni5Si2-based composite coating was successfully deposited on copper by pulse laser induction hybrid cladding (PLIC), and its high-temperature wear behavior was investigated. Temperature evolutions associated with crack behaviors in PLIC were analyzed and compared with pulse laser cladding (PLC) using the finite element method. The microstructure and present phases were analyzed using scanning electron microscopy and X-ray diffraction. Compared with continuous laser induction cladding, the higher peak power offered by PLIC ensures metallurgical bonding between highly reflective copper substrate and coating. Compared with a wear test at room temperature, at 500 °C the wear volume of the Cr13Ni5Si2-based composite coating increased by 21%, and increased by 225% for a NiCr/Cr3C2 coating deposited by plasma spray. This novel technology has good prospects for application with respect to the extended service life of copper mold plates for slab continuous casting. Full article
(This article belongs to the Special Issue Laser Cladding)
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