On the processing feasibility, microstructure evolution, and mechanical properties of laser clad Stellite® 21 alloy

Jeremy H. Rao; Nikki Stanford

doi:10.1007/s11666-020-01129-z

On the processing feasibility, microstructure evolution, and mechanical properties of laser clad Stellite^® 21 alloy

Jeremy H. Rao, Nikki Stanford

Materials Science & Engineering

Research output: Contribution to journal › Article › Research › peer-review

4 Citations (Scopus)

Abstract

Laser cladding is widely used for feature repair and manufacturing of large structural components. However, due to processing parameters and thus energy densities variation, defects can form in laser clad materials. There is a need to understand the relationship between energy densities and cladding quality. This study therefore investigates the critical parameters in producing structural Stellite^® 21 (Co-Cr-MoNiC) alloy by laser cladding. Compared with conventional manufacturing, laser clad materials possess ultrafine α-Co dendrites and σ-CoCr interdendritic eutectics due to the fast cooling rate. In addition, adjustment of the energy densities can help control defects and improve corrosion resistance. The wear resistance, microhardness, and phase analysis in the laser clad materials are also discussed in this work.

Original language	English
Number of pages	8
Journal	Journal of Thermal Spray Technology
DOIs	https://doi.org/10.1007/s11666-020-01129-z
Publication status	Accepted/In press - 3 Jan 2021

Keywords

corrosion resistance
defects
laser cladding
mechanical properties
microstructure
stellite 21 alloy

Access to Document

10.1007/s11666-020-01129-z

Cite this

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title = "On the processing feasibility, microstructure evolution, and mechanical properties of laser clad Stellite{\textregistered} 21 alloy",

abstract = "Laser cladding is widely used for feature repair and manufacturing of large structural components. However, due to processing parameters and thus energy densities variation, defects can form in laser clad materials. There is a need to understand the relationship between energy densities and cladding quality. This study therefore investigates the critical parameters in producing structural Stellite{\textregistered} 21 (Co-Cr-MoNiC) alloy by laser cladding. Compared with conventional manufacturing, laser clad materials possess ultrafine α-Co dendrites and σ-CoCr interdendritic eutectics due to the fast cooling rate. In addition, adjustment of the energy densities can help control defects and improve corrosion resistance. The wear resistance, microhardness, and phase analysis in the laser clad materials are also discussed in this work.",

keywords = "corrosion resistance, defects, laser cladding, mechanical properties, microstructure, stellite 21 alloy",

author = "Rao, {Jeremy H.} and Nikki Stanford",

note = "Funding Information: This work was supported by Australia Research Council (ARC) “Industrial Transformation Training Centre (ITTC) in Surface Engineering for Advanced Materials (SEAM)” under Grant [IC180100005]. The authors acknowledge the facilities, scientific, and technical assistance of Future Industries Institute (FII), Australian National Fabrication Facility (ANFF)-SA Node, and Microscopy Australia at the University of South Australia, the State and Federal Governments, LaserBond Ltd. The continued support of Prof Chris Berndt and Prof Emily Hilder is also gratefully acknowledged. Publisher Copyright: {\textcopyright} 2021, ASM International. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

year = "2021",

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doi = "10.1007/s11666-020-01129-z",

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AU - Rao, Jeremy H.

AU - Stanford, Nikki

N1 - Funding Information: This work was supported by Australia Research Council (ARC) “Industrial Transformation Training Centre (ITTC) in Surface Engineering for Advanced Materials (SEAM)” under Grant [IC180100005]. The authors acknowledge the facilities, scientific, and technical assistance of Future Industries Institute (FII), Australian National Fabrication Facility (ANFF)-SA Node, and Microscopy Australia at the University of South Australia, the State and Federal Governments, LaserBond Ltd. The continued support of Prof Chris Berndt and Prof Emily Hilder is also gratefully acknowledged. Publisher Copyright: © 2021, ASM International. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2021/1/3

Y1 - 2021/1/3

N2 - Laser cladding is widely used for feature repair and manufacturing of large structural components. However, due to processing parameters and thus energy densities variation, defects can form in laser clad materials. There is a need to understand the relationship between energy densities and cladding quality. This study therefore investigates the critical parameters in producing structural Stellite® 21 (Co-Cr-MoNiC) alloy by laser cladding. Compared with conventional manufacturing, laser clad materials possess ultrafine α-Co dendrites and σ-CoCr interdendritic eutectics due to the fast cooling rate. In addition, adjustment of the energy densities can help control defects and improve corrosion resistance. The wear resistance, microhardness, and phase analysis in the laser clad materials are also discussed in this work.

AB - Laser cladding is widely used for feature repair and manufacturing of large structural components. However, due to processing parameters and thus energy densities variation, defects can form in laser clad materials. There is a need to understand the relationship between energy densities and cladding quality. This study therefore investigates the critical parameters in producing structural Stellite® 21 (Co-Cr-MoNiC) alloy by laser cladding. Compared with conventional manufacturing, laser clad materials possess ultrafine α-Co dendrites and σ-CoCr interdendritic eutectics due to the fast cooling rate. In addition, adjustment of the energy densities can help control defects and improve corrosion resistance. The wear resistance, microhardness, and phase analysis in the laser clad materials are also discussed in this work.

KW - corrosion resistance

KW - defects

KW - laser cladding

KW - mechanical properties

KW - microstructure

KW - stellite 21 alloy

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