Study on the hydrogen induced cracking of API-X80 steels by using 3-axis controlled ultrasonic inspection unit

2018 ◽  
Vol 551 ◽  
pp. 79-82 ◽  
Author(s):  
Y. Baik ◽  
Y. Choi ◽  
H.G. Jung
Keyword(s):  
Ultrasonic Inspection ◽  
Hydrogen Induced Cracking ◽  
X80 Steels

Hydrogen Induced Cracking of Welds in Steel Pipelines

2003 ◽  
Author(s):  
J. A. Rami´rez ◽  
J. L. Gonza´lez
Keyword(s):  
Ultrasonic Inspection ◽  
Field Studies ◽  
Steel Plates ◽  
Weld Material ◽  
Straight Beam ◽  
Hydrogen Induced Cracking ◽  
Pass Through ◽  
Radial Cracks ◽  
Cracked Specimens ◽  
Submerged Arc

The phenomenon of Hydrogen Induced Cracking (HIC) by the absorption of hydrogen from a sour fluid in carbon steel plates is well known, however the question if HIC cracks can penetrate weld deposits is still subject of controversy in both laboratory and field studies. In this research, plates containing Submerged Arc Welding, Resistance Seam Welding and Shield Metal Arc welds, were exposed to cathodic charging to induce HIC and to determine if HIC cracks can grow and pass through the weld materials. The HIC progress in the plates was detected and monitored by straight beam ultrasonic inspection in the A-Scan mode. The results showed that HIC can occur in the weld by the same mechanism as in normal plate in the case of SAW welds, while in the other two (RSEW, SMAW) the crack deviates from its original trajectory to form radial cracks when the HIC cracks penetrate into the weld material. The study is completed by metallographic and fractographic observations of the cracked specimens.

Hydrogen Induced Cracking HIC Resistance in HSLA API 5L X65 e 5L X80 Steels

2017 ◽  
Author(s):  
J. Quispe Aviles ◽  
N. Alonso-Falleiros ◽  
H. G. de Melo
Keyword(s):  
Hydrogen Induced Cracking ◽  
X80 Steels

HYDROGEN-INDUCED CRACKING IN PURE IRON

1985 ◽  
Vol 46 (C10) ◽  
pp. C10-139-C10-142
Author(s):  
J. H. ARMSTRONG ◽  
S. H. CARPENTER
Keyword(s):  
Pure Iron ◽  
Hydrogen Induced Cracking

A Practical Ultrasonic Inspection Method for Detecting and Characterising Defects Found Within Composite Repairs

2018 ◽  
Author(s):  
J Downing ◽  
A Hook
Keyword(s):  
Wall Thickness ◽  
Steel Substrate ◽  
Ultrasonic Method ◽  
Ultrasonic Inspection ◽  
Heat Exposure ◽  
Matrix Cracking ◽  
Ultrasonic Technique ◽  
Inspection Method ◽  
Composite Repairs ◽  
Layered Matrix

Two steel substrate test panels were developed to represent common plate thicknesses found on naval vessels and scanned using the Babcock developed ultrasonic technique. One sample comprised of a series of slotted surface breaking flaws of varying widths and through thicknesses to represent fracturing/cracking. The inspection method detected simulated cracking to a depth of 2mm and 0.5mm in width. The second sample included numerous loss of wall thickness areas of varying diameters and through thicknesses, with the smallest detectable loss of wall thickness being 0.1mm at a 15mm diameter. After proving confidence in detection, there was a need to characterise flaws to provide support and ascertain a repair action. Samples were produced that were subjected to either impact or heat exposure to induce realistic representative damage. The practical ultrasonic method was successfully used to independently characterise between the samples, with induced de-laminations caused by blisters, and multi layered matrix cracking caused by varying levels of projectile impacts, due to their unique morphology.

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