Comparison of Metrological Techniques for Charpy Impact Machine Verification

2009 ◽  
pp. 20-20-15
Author(s):  
AK Schmieder
Keyword(s):  
Charpy Impact ◽  
Impact Machine

Experimental Analysis of an Instrumented Charpy Impact Using Signal Processing Approach

2011 ◽  
Vol 197-198 ◽  
pp. 1621-1625
Author(s):  
Mohd Basri Ali ◽  
Shahrum Abdullah ◽  
M.Zaki Nuawi ◽  
M.M. Padzi ◽  
K.A. Zakaria
Keyword(s):  
Signal Processing ◽  
Data Acquisition ◽  
Method Comparison ◽  
Low Carbon Steel ◽  
Charpy Impact ◽  
Dynamic Responses ◽  
Low Carbon ◽  
Impact Machine ◽  
Processing Approach ◽  
The Impact

The dynamic responses of the standard charpy impact machine are experimentally studied using the relevant data acquisition system in order to obtain the impact response. For this reason, strain gauges were connected to the data acquisition set and it was then attached to the charpy striker for the signal collection. Aluminium 6061 and low carbon steel 1050 were used for extracting strain responses on the striker during the testing. In this work, the power spectrum density (PSD) approach was then used for the energy based observation and a signal was converted from the time domain to the frequency domain using the fast Fourier transform (FFT) method. Comparison between experimental findings with related parameters such as of different materials, strain signals pattern, I-kaz, were finally correlated and discussed. It was found that the modulus of elasticity were proportional to the energy absorbed, strain signals amplitude and PSD. Finally, it is suggested that the properties of materials and the impact signals pattern is suitable to be analysed using the signal processing approach.

Evaluating Charpy Impact Signals with Different Frequencies Using Power Spectrum Densities

2010 ◽  
Vol 156-157 ◽  
pp. 1518-1521
Author(s):  
Shahrum Abdullah ◽  
Mohd Basri Ali ◽  
Mohd Zaki Nuawi ◽  
Zulkifli Mohd Nopiah ◽  
Kamal A. Ariffin
Keyword(s):  
Power Spectrum ◽  
Low Carbon Steel ◽  
Charpy Impact ◽  
Power Spectrum Density ◽  
Dynamic Responses ◽  
Low Carbon ◽  
Impact Machine ◽  
Impact Simulation ◽  
Spectrum Density ◽  
The Impact

The dynamic responses of the standard charpy impact machine are experimentally studied using the relevant data acquisition system in order to obtain the impact response. The numerical analysis by means of the finite element method has been used to obtain the findings. The standard charpy modelling using the aluminium 6061 material and low carbon steel 1050 were used for extracting strain responses on the striker during the impact simulation. A power spectrum density (PSD) approach is then applied to convert a signal from the time domain to the frequency domain using the fast Fourier transform (FFT) method. Related parameters of different frequencies, different material, strain signals, power spectrum density (PSD) and the relationship between them were finally correlated and discussed. It was found that the modulus elasticity of materials and frequencies (sample rates) were proportional to the strain signals and PSD during impact simulation.

Assessment of an instrumented Charpy impact machine

2005 ◽  
Vol 132 (3) ◽  
pp. 297-297
Author(s):  
Anton Shterenlikht ◽  
Sayyed H. Hashemi ◽  
John R. Yates ◽  
Ian C. Howard ◽  
Robert M. Andrews
Keyword(s):  
Charpy Impact ◽  
Impact Machine

Assessment of an instrumented Charpy impact machine

2005 ◽  
Vol 132 (1) ◽  
pp. 81-97 ◽  
Author(s):  
Anton Shterenlikht ◽  
Sayyed H. Hashemi ◽  
John R. Yates ◽  
Ian C. Howard ◽  
Robert M. Andrews
Keyword(s):  
Charpy Impact ◽  
Impact Machine

Comparing fast inductive tempering and conventional tempering: Effects on microstructure and mechanical properties

2018 ◽  
Vol 115 (4) ◽  
pp. 407 ◽  
Author(s):  
Annika Eggbauer Vieweg ◽  
Gerald Ressel ◽  
Peter Raninger ◽  
Petri Prevedel ◽  
Stefan Marsoner ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Impact Energy ◽  
Charpy Impact ◽  
Heat Treating ◽  
Processing Route ◽  
High Heating Rate ◽  
Heating Rates ◽  
High Heating ◽  
Tempering Treatment ◽  
Carbide Distribution

Induction heating processes are of rising interest within the heat treating industry. Using inductive tempering, a lot of production time can be saved compared to a conventional tempering treatment. However, it is not completely understood how fast inductive processes influence the quenched and tempered microstructure and the corresponding mechanical properties. The aim of this work is to highlight differences between inductive and conventional tempering processes and to suggest a possible processing route which results in optimized microstructures, as well as desirable mechanical properties. Therefore, the present work evaluates the influencing factors of high heating rates to tempering temperatures on the microstructure as well as hardness and Charpy impact energy. To this end, after quenching a 50CrMo4 steel three different induction tempering processes are carried out and the resulting properties are subsequently compared to a conventional tempering process. The results indicate that notch impact energy raises with increasing heating rates to tempering when realizing the same hardness of the samples. The positive effect of high heating rate on toughness is traced back to smaller carbide sizes, as well as smaller carbide spacing and more uniform carbide distribution over the sample.

ALLVAC 13-8 SUPER TOUGH

Alloy Digest ◽  
2003 ◽  
Vol 52 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Precipitation Hardening ◽  
Cold Working ◽  
Charpy Impact ◽  
Heat Treating ◽  
General Corrosion ◽  
Single Treatment ◽  
Good Resistance ◽  
Temperature Performance ◽  
Impact Energies

Abstract Allvac 13-8 Super Tough alloy is a modification of the standard Allvac 13-8 alloy. (See Alloy Digest SS-866, November 2002.) It has good fabricability and can be age hardened by a single treatment in the range 510 to 621 deg C (950 to 1150 deg F). Cold working prior to aging enhances the aging. These properties supplement the superior fracture toughness and Charpy impact energies. This martensitic precipitation-hardening stainless steel has very good resistance to general corrosion and stress-corrosion cracking. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-876. Producer or source: Allvac.

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