Microstructure and Properties of Laser Clad Nonmagnetic WC-FeNiCr Metal-Matrix Composite Coating

2012 ◽  
Vol 476-478 ◽  
pp. 2368-2373
Author(s):  
Jiao Xi Yang ◽  
Xuan He Miao ◽  
Fa Lan Liu
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Laser Cladding ◽  
Metal Matrix ◽  
Magnetic Measurements ◽  
Direct Injection ◽  
Xrd Analysis ◽  
Steel Matrix ◽  
Nonmagnetic Metal ◽  
Nonmagnetic Steel

Nonmagnetic metal-matrix composite (MMC) coatings were fabricated by laser cladding with direct injection of WC-FeNiCr powder onto the N1310 nonmagnetic steel matrix. Laser cladding was conducted using a Trumpf6000 CO2 laser. The WC-FeNiCr MMCs coating was characterized using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The phase constitution in the laser cladding was identified by x-ray diffraction (XRD). No pores or macro-cracks have been found at the interface indicating good metallurgical bonding between the coating and the N1310 nonmagnetic steel matrix. Magnetic measurements were carried out with vibrating sample magnetometer (VSM) at room temperature. The MMC coating was nonmagnetic and with a relative permeability of 1.004. The XRD analysis confirmed the presence of an austenitic γ-(Fe, Ni), Cr0.19Fe0.7Ni0.11, Fe3W3C, WC and W2C phases in the laser clad layer.

scholarly journals Microstructure evaluation, thermal and mechanical characterization of hybrid metal matrix composite

2018 ◽  
Vol 25 (6) ◽  
pp. 1187-1196 ◽  
Author(s):  
Shyam Lal ◽  
Sudhir Kumar ◽  
Zahid A. Khan
Keyword(s):  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Casting Process ◽  
Xrd Analysis ◽  
Stir Casting ◽  
Al 7075 ◽  
Dta Analysis ◽  
Hybrid Metal Matrix Composite ◽  
7075 Alloy

AbstractIn this paper, an inert gas assisted electromagnetic stir casting process is adapted for manufacturing a cast hybrid metal matrix composite (MMC) using Al2O3 and SiC particulates as a hard phase reinforcement in Al 7075 alloy metal matrix. Four different samples containing 5, 10, 15 and 20 wt% of Al2O3 and SiC with Al 7075 alloy composites were fabricated. The characterizations for all the samples were carried out through optical microstructure, scanning electron microscopy (SEM) fractograph, X-ray diffraction (XRD) analysis, differential thermal analysis (DTA) analysis and mechanical properties. The results revealed that the particles are uniformly distributed in the matrix. No peaks of Al4C3 were found. There is negligible loss of material in the composite. The tensile strength and microhardness of the hybrid composite are higher by 65.7% and 13.5%, respectively, when compared to its cast metal matrix Al 7075 alloy.

Online assessment of TiC decomposition in laser cladding of metal matrix composite coating

2017 ◽  
Vol 121 ◽  
pp. 310-320 ◽  
Author(s):  
Gopinath Muvvala ◽  
Debapriya Patra Karmakar ◽  
Ashish Kumar Nath
Keyword(s):  
Metal Matrix Composite ◽  
Composite Coating ◽  
Matrix Composite ◽  
Laser Cladding ◽  
Metal Matrix ◽  
Online Assessment

IN-SITU SYNTHETIC TiB2 PARTICULATE REINFORCED METAL MATRIX COMPOSITE COATING ON AA2024 ALUMINUM ALLOY BY LASER CLADDING TECHNOLOGY

2005 ◽  
Vol 12 (04) ◽  
pp. 561-567 ◽  
Author(s):  
JIANG XU ◽  
YIDE KAN ◽  
WENJIN LIU
Keyword(s):  
Aluminum Alloy ◽  
Elastic Modulus ◽  
Metal Matrix Composite ◽  
Composite Coating ◽  
Matrix Composite ◽  
Laser Cladding ◽  
Metal Matrix ◽  
Surface Hardness ◽  
Particulate Reinforced

In order to improve the wear resistance of aluminum alloy, in-situ synthesized TiB 2 and Ti 3 B 4 peritectic composite particulate reinforced metal matrix composite, formed on a 2024 aluminum alloy by laser cladding with a powder mixture of Fe -coated Boron, Ti and Al , was successfully achieved using 3-KW CW CO 2 laser. The chemical composition, microstructure and phase structure of the composite clad coating were analyzed by energy dispersive X-ray spectroscopy (EDX), SEM, AFM and XRD. The typical microstructure of the composite coating is composed of TiB 2, Ti 3 B 4, Al 3 Ti , Al 3 Fe and α- Al . The surface hardness of cladding coating increases with the amount of added Fe -coated B and Ti powder which determines the amount of TiB 2 and Ti 3 B 4 peritectic composite particulate. The nanohardness and the elastic modulus at the interface of the TiB 2 and Ti 3 B 4 peritectic composite particulate/matrix were investigated using the nanoindentation technique. The results showed that the nanohardness and the reduced elastic modulus from the peritectic composite particulate to the matrix is a gradient distribution.

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