Effect of NaOH Concentration on the Microstructure and Mechanical Properties of the PEO Coatings on Mg-Al3-Zn1 Alloy

2020 ◽  
Vol 977 ◽  
pp. 83-89
Author(s):  
Zeeshan Ur Rehman ◽  
Chanyoung Jeong ◽  
Dong Jin Choi
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Structure Analysis ◽  
Vickers Hardness ◽  
Hardness Test ◽  
Mg Alloy ◽  
Microstructure And Mechanical Properties ◽  
Composition And Structure ◽  
Peo Coatings ◽  
Vickers Hardness Test

In this work, the effect of NaOH concentration on the properties of PEO coatings formed on AZ31B Mg alloy is studied. Composition and structure analysis of coatings were carried out by XRD and SEM. From the results, it was found that the number of pores, defects and width of the discharge traces are highly dependent on NaOH concentration. Major phases of the coating identified from XRD were consisted of MgO and Mg2SiO4. The crystallinity of the coatings and magnitude of MgO phase was highly incremented with NaOH concentration. From the Vickers hardness test it was observed that hardness of the coatings prepared in 2g/l of NaOH have the highest values~1050HV, with peak wear resistance values.

scholarly journals Микротвердость и трещиностойкость оксида галлия

2019 ◽  
Vol 45 (21) ◽  
pp. 51
Author(s):  
В.И. Николаев ◽  
А.В. Чикиряка ◽  
Л.И. Гузилова ◽  
А.И. Печников
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
High Temperature ◽  
Vickers Hardness ◽  
Gallium Oxide ◽  
Hardness Test ◽  
Test Method ◽  
Vickers Hardness Test

The microhardness and the fracture toughness of two main polytypes of gallium oxide (a metastable α-Ga2O3 and thermodynamically stable high-temperature β-Ga2O3 phase) have been investigated. The measurements were carried out by the Vickers hardness test method. This is the first attempt to compare the mechanical properties of various polytypes of gallium oxide.

Effect of Binder on Wear Behavior of HVOF WC-Based Coatings

2014 ◽  
Vol 904 ◽  
pp. 155-158 ◽  
Author(s):  
Sun Hui Yao
Keyword(s):  
Wear Resistance ◽  
Vickers Hardness ◽  
Wear Behavior ◽  
Hardness Test ◽  
Wear Performance ◽  
Vickers Hardness Test

This study aimed to understand the effect of a binder on the wear performance of HVOF WC-based coatings. Three kinds of commercial feedstock powders were studied, i.e. WC-12Co, WC-10Co4Cr and WC-10Ni. Characterization was conducted using SEM, micro Vickers hardness test and XRD. It was found the WC-10Co4Cr coating showed the highest hardness, while the WC-10Ni coating the lowest. The WC-10Co4Cr coating showed very good wear resistance as compared with the widely used WC-12Co coating.

Mechanical Properties Determination of Unknown and 10Ch2MFA Steel Based on Non-Destructive Instrumented Hardness Test

2015 ◽  
Vol 662 ◽  
pp. 73-76
Author(s):  
Martin Stodola ◽  
Hynek Hadraba
Keyword(s):  
Mechanical Properties ◽  
Vickers Hardness ◽  
Hardness Test ◽  
Basic Material ◽  
Fem Modeling ◽  
Indentation Curve ◽  
Weld Structure ◽  
Non Destructive ◽  
Vickers Hardness Test

The aim of the paper is to present developed methodology for evaluation of mechanical properties using nondestructive (NDT) methods. The final methodology will focus on evaluating the mechanical properties of the heterogeneous weld structure. The mechanical properties are determined by conducting NDT instrumented Vickers hardness test. The developed methodology for the basic mechanical properties determining is based on the inverse FEM modeling of instrumented hardness test and the indentation curve and the measured surface imprint are the output of indentation. The outputs from the experimental hardness test (the corresponding values from indentation curve and measured surface) are not always corresponding. These differences affect the accuracy of the developed methodology, because it is achieved of the basic material mechanical properties by comparing the outputs of the experimental instrumented hardness test and modeled hardness test using FEM.

Microstructure and mechanical properties of AZ31 Mg alloy produced by a new compound extrusion technique

2018 ◽  
Vol 60 (10) ◽  
pp. 1021-1025 ◽  
Author(s):  
Liwei Lu ◽  
Zhenru Yin ◽  
Jun Zhao ◽  
Dongfeng Shi ◽  
Chuming Li
Keyword(s):  
Mechanical Properties ◽  
Mg Alloy ◽  
Microstructure And Mechanical Properties ◽  
Az31 Mg Alloy
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