Method for Brinell hardness test

2015 ◽  
Keyword(s):  
Brinell Hardness ◽  
Hardness Test

scholarly journals Small Diameter Tube Post-Weld Heat Treatment Process with Brinell Hardness and Microstructure Inspection

2021 ◽  
Vol 2083 (2) ◽  
pp. 022009
Author(s):  
Xiangqian Qi
Keyword(s):  
Heat Treatment ◽  
Constant Temperature ◽  
Welded Joints ◽  
Brinell Hardness ◽  
Lath Martensite ◽  
Small Diameter ◽  
Hardness Test ◽  
Post Weld Heat Treatment ◽  
Microstructure Observation ◽  
Weld Heat

Abstract The local post-weld heat treatment (PWHT) process test of 9Cr-3W-3Co small-diameter pipe welded joints was carried out using rope-type resistance heaters with different parameters, and the Brinell hardness test and microstructure observation were carried out on the welded joints after heat treatment. The results show that when the heating width was 200mm, the constant temperature was 790°C-800°C, and the constant temperature time was 2 hours, the Brinell hardness of the weld was in the range of 246HBW-265HBW, which had good performance. After tempering at 760°C-800°C, the welds all showed a clear tempered lath martensite.

The Thrust Exerted on a Gas-Pressurized Vessel During Axial Rupture

1992 ◽  
Vol 206 (1) ◽  
pp. 15-24 ◽  
Author(s):  
M R Baum ◽  
A A Parry
Keyword(s):  
Computer Simulation ◽  
Finite Element ◽  
Constant Velocity ◽  
Maximum Rate ◽  
Brinell Hardness ◽  
Hardness Test ◽  
Indentation Size ◽  
Steel Vessel ◽  
Burst Test ◽  
Indentation Process

This paper investigates the thrust exerted on a vessel as a result of axial rupture, which has not previously been examined theoretically or practically. A simple model is developed to predict the peak thrust when the breach is large, that is when the fracture is propagating with constant velocity and the maximum rate of separation of the free edges downstream of the fracture tip has been achieved. The model assumes that the depressurization process within the breach zone is dominated by the transverse rarefaction wave initiated by the arrival of the breach as it advances along the vessel. The prediction is compared with a measurement made during a burst test on a large air-pressurized steel vessel. A novel measurement technique employed an inverse Brinell hardness test, in which the indentation size was used to calculate back to the force that produced it. This was interpreted with the help of a finite element computer simulation of the indentation process.

Phase Reactions During Sintering of M3/2 Based Composites with WC Additions

2013 ◽  
Vol 58 (3) ◽  
pp. 703-708 ◽  
Author(s):  
M. Madej
Keyword(s):  
Grain Boundary ◽  
Carbide Phase ◽  
High Speed ◽  
Brinell Hardness ◽  
High Speed Steel ◽  
Hardness Test ◽  
Edx Analysis ◽  
Boundary Film ◽  
Dilatometric Studies ◽  
Cold Pressed

Abstract Attempts have been made to describe the influence of WC additions on properties of M3/2 high speed steel (HSS) based composites. The powder compositions used to produce skeletons for further infiltration were M3/2, M3/2+10%WC and M3/2+30%WC. The powders were cold pressed at 800 MPa. The green compacts were subsequently sintered for 60 minutes at 1150°C in vacuum. These as-sintered specimens were used for copper infiltration. A qualitative EDX analysis revealed presence of both MC type vanadium-rich carbides and M6C type tungsten and iron rich carbides. In specimens containing 10 and 30% WC the carbide phase was uniformly distributed within copper-rich regions. The WC monocarbide reacts with the surrounding HSS matrix and forms a carbide grain boundary film. The microstructural observations of the as-sintered specimens was followed by Brinell hardness test and supplemented with dilatometric studies.

scholarly journals SIFAT MEKANIK BAHAN KOMPOSIT KAMPAS REM BERBAHAN DASAR SERBUK ARANG KULIT BUAH MAHONI

2017 ◽  
Vol 2 (2) ◽  
pp. 127
Author(s):  
Herwidhi Tri Prabowo ◽  
Sulhadi Sulhadi ◽  
Mahardika Prasetya Aji ◽  
Teguh Darsono
Keyword(s):  
Composite Material ◽  
Brinell Hardness ◽  
Hardness Test ◽  
Alternative Solution ◽  
Coconut Shell ◽  
Carbon Powder ◽  
Natural Material ◽  
Brake Disk ◽  
Disk Brake ◽  
Effective Product

Mahogany bark is one of natural material which not used optimally in society. The overabundance of mahogany bark appearing new problem of garbage which charges an alternative solution creatively and innovatively becomes a new efficient and effective product. An alternative solution of mahogany bark utilization is as organic composite material of disk brake. The making of organic composite material of brake disk firstly is reducing the mahogany bark becomes a homogeneous carbon powder. The mahogany bark was smoked being of carbon and mixed with coconut shell and resin polyester as an adhesive. The organic composite material was produced, tested by Brinell Hardness test and attrition test by varied of composition percentage. There are five kinds of composite material composition had been tested. The result is obtainable of the most precise composition percentage 60% mahogany bark carbon, 15% coconut shell carbon, and 25% resin polyester which has brinell hardness number and attrition massa identically with Standar Nasional Indonesia (SNI). Keywords: mahogany bark, composite material, disk brake, Brinell hardness test, attrition test

scholarly journals Mechanical and electrical properties of ternary Ag-Bi-Ga system at 250 °C

10.30544/309 ◽  
2017 ◽  
Vol 23 (3) ◽  
pp. 227-240
Author(s):  
Duško Minić ◽  
Dragan Manasijević ◽  
Yong Du ◽  
Pavel Brož ◽  
Vladan Ćosović ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Energy Dispersive Spectrometry ◽  
Thermodynamic Assessment ◽  
Vickers Microhardness ◽  
Brinell Hardness ◽  
Hardness Test ◽  
X Ray ◽  
Mechanical And Electrical Properties ◽  
Comparative Review ◽  
The Individual

This paper presents a comparative review of the experimental and thermodynamic assessment of a ternary Ag-Bi-Ga system. An isothermal section at 250 °C was calculated using optimized thermodynamic data for the constitutive binaries. Microstructures and phase compositions of studied alloys were analyzed by scanning electron microscopy in combination with energy dispersive spectrometry and X-ray powder diffraction technique. The obtained experimental results were found to support the predicted phase equilibria rather well. The hardness of alloys from three vertical sections (Bi-AgGa, Ag-BiGa, and Ga-AgBi) was determined using Brinell hardness test while the hardness of the individual identified phases was determined using Vickers microhardness test. Additional electrical conductivity measurements were carried out on the same alloy samples. Based on the experimentally obtained results iso-lines of Brinell hardness and electrical conductivity for the entire compositional range were calculated.

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