Threshold Hydrogen Assisted Cracking of High Strengh Steels

TRIP-assisted steels: cracking of high-carbon martensite

Modern TRIP assisted steels contain retained austenite with carbon concentrations in excess of 1 wt-%. Some of their mechanical properties, in particular the toughness and ductility, rely on the diffusionless transformation of this austenite into high-carbon martensite, induced by stress and strain. The properties can be excellent in spite of the fact that freshly formed high-carbon martensite ...

A Comparison of Hydrogen Embrittlement and Stress Corrosion Cracking in High Strength Steels

The purpose of this study was to compare the known behavior of hydrogen embrittled high-strength steel to the characteristics of environmentallyinduced stress corrosion failure where hydrogen is continuously generated at the specimen surface. The incubation time for the initiation of slow crack growth was accelerated by prestressing for a fixed time below the lower critical limit. These results...

Characteristics of Hydrogen Embrittlement, Stress Corrosion Cracking and Tempered Martensite Embrittlement in High-strength Steels

Characteristics of tempered martensite embrittlement (TME), hydrogen embrittlement (HE), and stress corrosion cracking (SCC) in high-strength steels are reviewed. Often, it is important to determine unambiguously by which of these mechanisms failure occurred, in order to suggest the right actions to prevent failure recurrence. To this aim, samples made of high-strength AISI 4340 alloy steel wer...

an observation on metallurgical factors affecting hydrogen and sulfide induced stress cracking of pipeline steels

the effect of metallurgical parameters influencing the susceptibility of the steel grades, used for gas and oil pipe, to hydrogen induced cracking and sulfide stress corrosion cracking has been studied. the study of the recent investigations suggests that the shape and the nature of inclusions, microstructures, sulfur content and desulfurization as well as the nature of alloying elements in ste...

Environmentally Assisted Cracking Behavior of Low Alloy Steels in Simulated BWR Coolant Conditions