Electric-Potential-Drop Studies of Fatigue Crack Development in Tensile-Shear Spot Welds

2009 ◽  
pp. 383-383-19 ◽  
Author(s):  
MH Swellam ◽  
P Kurath ◽  
FV Lawrence
Keyword(s):  
Fatigue Crack ◽  
Electric Potential ◽  
Potential Drop ◽  
Crack Development ◽  
Tensile Shear ◽  
Spot Welds ◽  
Fatigue Crack Development

Test Stand for Analysis of Fatigue Crack Propagation under Bending with Torsion

2008 ◽  
Vol 144 ◽  
pp. 90-93 ◽  
Author(s):  
Grzegorz Gasiak ◽  
Grzegorz Robak
Keyword(s):  
Fatigue Crack ◽  
Crack Propagation ◽  
Fatigue Crack Propagation ◽  
Digital Camera ◽  
Crack Propagation Rate ◽  
Propagation Rate ◽  
Test Stand ◽  
Crack Development ◽  
Fatigue Crack Propagation Rate ◽  
Fatigue Crack Development

The paper presents a test stand for measurements of fatigue crack propagation. The stand includes a fatigue machine MZGS–100 and a device for registration of the crack length. The test stand is equipped with a stereoscopic microscope with fluent magnification of 7× – 67.5×. The microscope can be applied for observation of fatigue crack development. The microscope is also equipped with a digital camera, which enables continuous observation of fatigue crack development on the computer monitor and it is not necessary to stop the machine. The test results obtained at this stand can be used for determination of fatigue life and fatigue crack propagation rate.

Fractography and fatigue crack development kinetics in cast iron crankshafts

1983 ◽  
Vol 15 (5) ◽  
pp. 691-695
Author(s):  
V. A. Stepanenko ◽  
N. N. Sultani ◽  
V. V. Khil'chevskii ◽  
Yu. M. Shemegan
Keyword(s):  
Fatigue Crack ◽  
Cast Iron ◽  
Crack Development ◽  
Fatigue Crack Development

General Rule of Method for Measurement of Thickness and Crack Size by Electric Potential Drop Technique: Outline of the NDIS3426:2008

2009 ◽  
Author(s):  
Yang Ju ◽  
Seiichi Hamada
Keyword(s):  
Fatigue Crack ◽  
Electric Potential ◽  
General Rule ◽  
Potential Drop ◽  
Crack Size ◽  
Pulsed Direct Current ◽  
Measurement Of Thickness ◽  
Drop Technique ◽  
Direct Current Potential Drop ◽  
Current Potential

The Japanese Society for Non-Destructive Inspection (JSNDI) published general rule of method for measurement of thickness and crack size by Electric Potential Drop Technique as the Standard of JSNDI (NDIS3426) in January, 2008. NDIS3426 was established based on the researches for many years including the round robin tests conducted as the academic activities in JSNDI, and the previous technical guideline and standard ASTM E-647-05 ANNEX A6 and BS ISO 12108:2002 established for the measurement of fatigue crack growth in specimens. In this paper, the outline and the background of NDIS3426 was described. The electric potential drop technique is one of the promising methods to monitor or measure the thickness and crack size for the practical use in many industries. For the inspection of the surface deep fatigue crack in the steam turbine casing, the advanced crack depth indicator based on the potential drop technique has been applied. For the monitoring the creep damage accumulated in the seam-welded power piping, the commercialized tool based on the pulsed direct current potential drop technique has been used. For the pipe wall thinning measurement in the operating thermal power plant, the pulsed direct current potential drop technique was applied. This paper shows the present condition of the practical use and the future prospect of the potential drop technique.

Creep–fatigue crack development from short crack starters

2014 ◽  
Vol 31 (4) ◽  
pp. 305-314 ◽  
Author(s):  
W-. T. Yan ◽  
S. Holdsworth ◽  
I. Kühn ◽  
E. Mazza
Keyword(s):  
Fatigue Crack ◽  
Crack Development ◽  
Short Crack ◽  
Creep Fatigue ◽  
Fatigue Crack Development ◽  
Creep Fatigue Crack
Sign in / Sign up

Export Citation Format

Share Document