scholarly journals The prototype of high stiffness load cell for Rockwell hardness testing machine calibration according to ISO 6508-2:2015

2017 ◽  
Vol 901 ◽  
pp. 012060
Author(s):  
M Pakkratoke ◽  
T Sanponpute
Keyword(s):  
Testing Machine ◽  
Load Cell ◽  
Rockwell Hardness ◽  
Hardness Testing ◽  
High Stiffness ◽  
Machine Calibration

Influence of High Temperature Annealing on Microstructure Evolution of Ni-24Fe-14Cr-8Mo Superalloy

2021 ◽  
Vol 904 ◽  
pp. 117-123
Author(s):  
Yi Cui ◽  
Yun Fei Zhang ◽  
Yan Guang Han ◽  
Da Lv
Keyword(s):  
High Temperature ◽  
Microstructure Evolution ◽  
Testing Machine ◽  
Aging Treatment ◽  
Growth Patterns ◽  
High Temperature Annealing ◽  
Rockwell Hardness ◽  
Hardness Testing ◽  
X Ray Diffraction ◽  
X Ray

The effect of high temperature annealing on microstructure evolution of Ni-24Fe-14Cr-8Mo alloy was investigated through Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and Rockwell Hardness Testing Machine. Three kinds of grain growth patterns were found at different annealing temperatures due to carbides precipitation and dissolution. After a combination of high temperature annealing and aging treatment, the hardness versus time curves performed a parabolic pattern. The highest hardness was achieved under 1070°C/60 minutes treatment, and the desirable annealing time should be 60 minutes to 90 minutes.

Effect of CeO2 on Microstructure and Hardness of Roller Surface Alloyed by Laser

2012 ◽  
Vol 155-156 ◽  
pp. 877-880
Author(s):  
Huai Jun Yue ◽  
Qi Bin Liu
Keyword(s):  
Co2 Laser ◽  
Testing Machine ◽  
Surface Hardness ◽  
Service Performance ◽  
Micro Hardness ◽  
Rockwell Hardness ◽  
Hardness Testing ◽  
Coating Materials ◽  
Hardness Tester ◽  
Molten Liquid

To improve the service performance of roller. The surface of roller was alloyed by a 5kW CO2 laser. The effect of CeO2 on microstructure and hardness was studied by means of OM, Micro-hardness Testing Machine and Rockwell hardness tester. The results indicate that addition of CeO2 into coating materials can enhance the fluidity of molten liquid, refine and purify microstructure and increase microhardness and surface hardness of alloying coating.

scholarly journals INVESTIGATION OF CONTACT FATIGUE AND OPERATING PERFORMANCE OF NI-WC COMPOSITE ELECTROCOATED GEARS

2015 ◽  
Vol 8 (1) ◽  
pp. 1472-1477
Author(s):  
KETAN BHAT ◽  
Maneesh Avadhani ◽  
Milind Gurav ◽  
Vadiraj Patil ◽  
M. Krishna
Keyword(s):  
Operating Performance ◽  
Testing Machine ◽  
Contact Fatigue ◽  
Rockwell Hardness ◽  
Hardness Testing ◽  
X Ray Diffraction ◽  
Test Rig ◽  
Operation Condition ◽  
X Ray ◽  
Resistance To Wear

The objective of the work was to evaluate contact fatigue and operating performance of electrodeposited Ni-WC composite coated gears using experimental technique. The electrodeposited Ni-WC coating was characterized for coating thickness, hardness and crystal structure using Electro-Physik gauge, Rockwell Hardness testing machine and X-Ray Diffraction respectively. The operation condition was estimated using designed test rig and vibration pick with CRO. The results show that coated gears are smoother in operation and offer more resistance to wear and fretting due to increased hardness.

Design and Performance of a Deadweight Standard Rockwell Hardness Testing Machine

1978 ◽  
Vol 6 (4) ◽  
pp. 276
Author(s):  
RT Horstman ◽  
KC Lieb ◽  
RL Meltzer ◽  
IC Moore ◽  
G Barbato ◽  
...  
Keyword(s):  
Testing Machine ◽  
Rockwell Hardness ◽  
Hardness Testing ◽  
And Performance

A Laboratory Scale Equipment to Relieve Force and Pressure in Cold Extrusion of Lead Hollow Components

2008 ◽  
Vol 367 ◽  
pp. 137-144 ◽  
Author(s):  
Luigino Filice ◽  
Francesco Gagliardi ◽  
Fabrizio Micari
Keyword(s):  
Numerical Analysis ◽  
Testing Machine ◽  
Load Cell ◽  
Numerical Code ◽  
Cold Extrusion ◽  
Compression Tests ◽  
Local Pressure ◽  
Total Load ◽  
Pure Lead ◽  
Good Surface

Nowadays, many researchers are involved in studies aimed to the explanation of some peculiar aspects regarding manufacturing processes. In this paper, an experimental campaign was carried out in order to reproduce tube extrusion starting from a cylindrical billet. In particular, the development of a proper equipment is presented: the aim was to measure both the total load, by using the testing machine load cell, and the local pressure value on the porthole. The latter task was carried out performing a proper system based on the use of a small load-cell. The tube was extruded with a good surface quality and the external area does not show any welding line evidence. Pure Lead was used for the experimental analysis; this material was chosen due to its high ductility which allows to carry out the process at room temperature. The material was characterized by compression tests at different strain rates and the obtained material law was used to perform a numerical analysis using SFTC Deform 3D numerical code. The Numerical analysis was carried out to show both the advantages and drawbacks of the modern FE codes when extrusion processes are investigated.

The effect of contouring the connecting bar in an acrylic-pin external fixator

2001 ◽  
Vol 14 (04) ◽  
pp. 190-195 ◽  
Author(s):  
E. L. Egger ◽  
G. D. Herndon
Keyword(s):  
Ultimate Strength ◽  
Axial Compression ◽  
External Fixator ◽  
Testing Machine ◽  
Biomechanical Testing ◽  
Catastrophic Failure ◽  
High Stiffness

This studies the effects of contouring of acrylic column when placed in axial compression. Six different angles were studied, 0°, 30°, 45°, 60°, 90° and a 90° with a 2.0 mm connecting bar. Each column was then placed under axial compression using a biomechanical testing machine. As the angle of the contour increased there was a significant decrease in the ultimate stiffness and ultimate strength of the columns. However, the amount of force required to cause catastrophic failure in any of the group was still high (stiffness 300 N/mm ± 70, ultimate strength 1032 N ± 139) which may not be reached in a physiological setting. When using a severe angulation of the column the using of a connecting bar will significantly increase both stiffness and strength of the acrylic.

SIM.M.F-S1: Testing machine calibration in compression SIM comparison up to 100 kN

Metrologia ◽  
2014 ◽  
Vol 51 (1A) ◽  
pp. 07001-07001
Author(s):  
Juan Christian Villarroel Poblete ◽  
Hernán Oliva C ◽  
Luis Rubén Soto Pinto ◽  
Guenther Haucke
Keyword(s):  
Testing Machine ◽  
Machine Calibration
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