WebFeb 20, 2024 · their effects on the intergranular embrittlement at S3(111) tilt symmetric … Hydrogen embrittlement (HE), also known as hydrogen-assisted cracking or hydrogen-induced cracking (HIC), is a reduction in the ductility of a metal due to absorbed hydrogen. Hydrogen atoms are small and can permeate solid metals. Once absorbed, hydrogen lowers the stress required for cracks in the … See more Hydrogen embrittlement is a complex process involving a number of distinct contributing micro-mechanisms, not all of which need to be present. The mechanisms include the formation of brittle See more While most failures in practice have been through fast failure, there is experimental evidence that hydrogen also affects the fatigue properties of steels. This is entirely expected given the nature of the embrittlement mechanisms proposed for fast fracture. In … See more During manufacture, hydrogen can be dissolved into the component by processes such as phosphating, pickling, electroplating, casting, carbonizing, surface cleaning See more Most analytical methods for hydrogen embrittlement involve evaluating the effects of (1) internal hydrogen from production and/or … See more Hydrogen embrittles a variety of metals including steel, aluminium (at high temperatures only ), and titanium. Austempered iron is also susceptible, though … See more Hydrogen embrittlement is a volume effect: it affects the volume of the material. Environmental embrittlement is a surface effect where molecules from the atmosphere surrounding the material under test are adsorbed onto the fresh crack surface. This … See more Hydrogen embrittlement can be prevented through several methods, all of which are centered on minimizing contact between the metal and … See more
The effect of interstitial N on grain boundary cohesive strength in …
WebJul 1, 1999 · Toward an electronic level understanding of intergranular embrittlement and … WebBoth helium and hydrogen are known to degrade the mechanical performance of reactor materials, but their binary effect has not been well understood. Using abinitio density functional theory calculations, we have investigated the He-H interactions both in the bulk a cavi jet plus
ALLOY ELEMENT AFFECTION IN STEEL PROPERTIES - AMARINE
http://anstd.ans.org/NETS-2024-Papers/Track-1--Emerging-Technologies-in-Space/abstract-125-0.pdf WebApr 3, 2001 · An electronic level phenomenological theory is proposed to predict unambiguously the effect of a substitutional alloying addition on grain boundary cohesion of metallic alloys, based on first-principles full-potential linearized augmented plane-wave method (FLAPW) calculations on the strengthening and embrittling effects of the … WebSimple bend tests and notched bar tensile tests have been commonly used for studying the embrittling effect. The bend test, torsion test, and static sustained load beam test were investigated. A static sustained load beam test, using a 9- x 1/4- x 1/2-in. specimen with the grain transverse to the length was adopted. cavikano