Rock cuttability assessment using the concept of hybrid dynamic hardness (HDH)

2014 ◽  
Vol 74 (4) ◽  
pp. 1363-1374 ◽  
Author(s):  
N. Gunes Yilmaz ◽  
D. Tumac ◽  
R. M. Goktan
Keyword(s):  
Dynamic Hardness ◽  
Rock Cuttability

Algorithms for Dynamic Hardness Measurements by Scratch Testing in the Submicron and Nanometer Scale

2013 ◽  
Vol 853 ◽  
pp. 619-624
Author(s):  
Natalia Lvova ◽  
K. Kravchuk ◽  
I. Shirokov
Keyword(s):  
Contact Area ◽  
Scanning Probe Microscopy ◽  
Scanning Probe ◽  
Nanometer Scale ◽  
Geometrical Parameters ◽  
Scratch Testing ◽  
Dynamic Hardness ◽  
Probe Microscopy ◽  
Parameters Analysis

The automatic scratch geometrical parameters analysis algorithms based on the images obtained by scanning probe microscopy have been developed. We provide a description of the technique to determine the contact area and the scratch volume with and without account of the pile-ups. The developed algorithms are applied to measure the dynamic hardness by sclerometry on the submicron and nanometer scale.

Dynamic Hardness of MCrAlY Abradable Seal Coating

2021 ◽  
Vol 1035 ◽  
pp. 591-595
Author(s):  
Dan Guo ◽  
Jian Ming Liu ◽  
De Ming Zhang ◽  
Xin Zhang ◽  
Tong Liu
Keyword(s):  
Strain Rate ◽  
Split Hopkinson Pressure Bar ◽  
Hopkinson Pressure Bar ◽  
Dynamic Hardness ◽  
Mcraly Coating ◽  
Static Hardness ◽  
Split Hopkinson ◽  
The Difference ◽  
Pressure Bar ◽  
Abradable Coatings

The purpose of this investigation is to study the dynamic hardness of MCrAlY abradable coatings under different strain rates. A dynamic indentation device based on the split Hopkinson pressure bar system (SHPB) was used. The results show that the hardness of MCrAlY coating increased with the increase of the strain rate, which has a positive strain rate effect. In addition, the difference of the static hardness of MCrAlY coating prepared by HVOF and LPPS was only 4%, while the difference in dynamic hardness was 16%.

Investigation on dynamic hardness and high strain rate indentation size effects in aluminium (110) using nano-impact

2019 ◽  
Vol 133 ◽  
pp. 55-62 ◽  
Author(s):  
Liguang Qin ◽  
Heng Li ◽  
Xiangru Shi ◽  
Ben D. Beake ◽  
Lin Xiao ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Size Effects ◽  
High Strain ◽  
Indentation Size ◽  
Dynamic Hardness

Nanoindentation Hardness of Compositionally Modulated Ti/TiN Multilayered Films

1997 ◽  
Vol 505 ◽  
Author(s):  
Eiji Kusano ◽  
Masaru Kitagawa ◽  
Hidehito Nanto ◽  
Akira Kinbara
Keyword(s):  
Flow Rate ◽  
Hardness Measurement ◽  
Film Deposition ◽  
Multilayered Films ◽  
Dynamic Hardness ◽  
Modulation Period ◽  
Compositional Modulation ◽  
Film Hardness ◽  
Control Pattern ◽  
Flow Rate Control

ABSTRACTA detailed study of microhardness of multilayered films has been strongly needed to reveal effects of film layer structures and deposition conditions on the film hardness. A nanoindentation method is a useful method to investigate mechanical properties of thin films prepared on substrate materials. In this respect we have deposited a several types of Ti/TiN multilayered films and estimated their hardness by a nanoindentation method. The desired compositional modulation was obtained by changing the flow rate of N2gas periodically using a computer system. The modulation period has been varied from 10 to 40nm by changing a flow rate control pattern. The total thickness of the film was about 500nm including the underlayer of the TiO2(50nm)/Ti(50nm) multilayer for all samples with different modulation period. Substrates used in the experiment were borosilicate glass and not heated during film deposition. The compositional distribution toward to the film depth orientation was estimated by Auger electron spectroscopy. The dynamic hardness of the films has been estimated by a nanoindenter as a function of the modulation period. It was found that there existed an optimum modulation period of 20nm to enhance the film hardness by multilayer structure.. The maximum value of microhardness obtained for the optimum modulation period was 29GPa, which was much larger than that of the monolithic TiN coating of 15GPa. The hardness measurement results show that the behavior for dynamic hardness was different from that for plastic deformation hardness obtained.

scholarly journals Dynamic hardness tester and cure meter

1992 ◽  
Vol 25 (4-5) ◽  
pp. 226-227
Author(s):  
W.M. Madigosky ◽  
R.B. Fiorito
Keyword(s):  
Dynamic Hardness ◽  
Hardness Tester
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