Early stages of subsurface crack and WEC formation in 100Cr6 bearing steel under RCF and hydrogen influence
Source abstract
Abstract
Abstract Hydrogen precharged specimens were tested in a disc-on-disc tribometer to study the early stages of crack formation that, with cycling, eventually generate WEC or WSF. Specimens whose contact surface was intact were analysed and at subsurface numerous small transgranular cracks were found, as well as sequences of unlinked voids. Premature WEC with fine cracks and little microstructural alteration volume were also found. This paper aims to clarify certain concepts of debate concerning WEC such as the formation of WEAs, the initiation and propagation of cracks and the influence of defects in steel, the mechanisms by which hydrogen favours the development of cracks and WEAs and the transgranular character of cracks. Finally, a crack formation mechanism is proposed which may lead to a novel hypothesis on the mechanism of WEA formation.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Hydrogen embrittlement and corrosion behaviors in metals · Metal Alloys Wear and Properties · Mechanical stress and fatigue analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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