Method for Vickers hardness test and for verification of Vickers hardness testing machines

1990 ◽  
Keyword(s):  
Vickers Hardness ◽  
Hardness Test ◽  
Hardness Testing ◽  
Vickers Hardness Test

Analysis of Load-Displacement Curves of Ceramics Measured with Low-Load Vickers Hardness Test: Indentation Size Effect

2011 ◽  
Vol 492 ◽  
pp. 9-13
Author(s):  
Bei Xu ◽  
Jiang Hong Gong
Keyword(s):  
Size Effect ◽  
Vickers Hardness ◽  
Indentation Size Effect ◽  
Hardness Test ◽  
Hardness Testing ◽  
Indentation Size ◽  
Nanoindentation Testing ◽  
Low Load ◽  
Load Displacement ◽  
Vickers Hardness Test

The load-displacement curves for a series of ceramic and glass samples were recorded continuously during the low-load Vickers hardness testing. Then the hardnesses of all samples were determined by analyzing the unloading curves. It was found that all the test materials exhibit indentation size effect (ISE) similar to that observed in nanoindentation testing. The applicability of the proportional specimen resistance (PSR) model and the modified PSR model was then examined using the measured indentation data.

scholarly journals Calibration Of Vickers Hardness Test PT.Tenaris Seamless Pipe Indonesia Jaya Cilegon Using Standar Blok

2020 ◽  
Vol 64 (3) ◽  
pp. 81-87
Author(s):  
Dodi Dodi Sofyan Arief ◽  
◽  
Muftil Badri ◽  
M Dalil ◽  
Agus Reforiandi ◽  
...  
Keyword(s):  
Vickers Hardness ◽  
Testing Machine ◽  
Hardness Test ◽  
International Standards ◽  
Measuring Instruments ◽  
Test Machine ◽  
Hardness Testing ◽  
Diamond Pyramid ◽  
Vickers Hardness Test

A calibration is an activity to determine the conventional validity of the appointment value of measuring instruments and measuring materials by comparing them to standard measurements that are traceable to national and international standards for measurement units and or international and certified reference materials. The calibration is generally a process of adjusting the output or indication of a measurement device to match the magnitude of the standard used in certain accuracy. The purpose of this paper is to find out the vickers hardness test calibration whether the machine running normally or there is a problem with the device. A case study was conducted in PT. Tenaris SPIJ, Cilegon, Indonesia. A vickers hardness testing in the case study has its own reference standard, namely ISO 6507-2: 2018 Metal material - Hardness Test Verification and Calibration of the test machine. The vickers hardness test equipment is a machine to conduct tests using a diamond pyramid with a plane angle of 136°, by means of an emphasis by an indentor that results in a trace or indentation on the surface of the test object. The vickers hardness testing is abbreviated as HV or HVN and also known as Diamond Pyramid Hardness Test (DPH). Result of calibration in the case study was found the repeatability value on vickers hardness testing machine of 32 HV 10 and the error value of ±3%.

scholarly journals The effect of various Co contents on the microstructure and properties of Ti(C,N)-TiB2-Co cermets prepared in situ via reactive hot pressing

2020 ◽  
Vol 12 (5) ◽  
pp. 168781402092571
Author(s):  
Xianrui Zhao ◽  
Ze Yu ◽  
Dunwen Zuo ◽  
Qintao Li ◽  
Mengxian Zhang ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Relative Density ◽  
Vickers Hardness ◽  
Hot Pressing ◽  
Hardness Test ◽  
Reactive Hot Pressing ◽  
Compacting Pressure ◽  
Vickers Hardness Test ◽  
Scanning Electron

Ti(C,N)-TiB2-Co cermets were in situ synthesized, via reactive hot pressing from the Co-Ti-C-BN system, with a Co content ranging from 6 to 22 wt%. The microstructure, relative density, hardness, and fracture toughness of the sintered compacts was investigated by light microscopy, scanning electron microscopy, ceramic densitometry, and Vickers hardness test. The investigations indicate that during hot pressing (compacting pressure = 30 MPa), when the Co content is 14–22 wt%, the metal binder is extruded. Co and Ti are included in the extrudate, breaking the original ratio and deteriorating the properties of the sintered products. As the Co content increases from 6 wt% to 12 wt%, the porosity increases, and the relative density increases from 97.2% to 99.5%. The fracture toughness increases from 6.1 to 6.8 MPa m1/2. The Vickers hardness first increases from 1897 HV10 to the maximum 1960 HV10 and then decreases slightly to 1945 HV10.

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