Grain boundary liquation
WebJul 6, 2024 · The liquation at grain boundaries is also likely through constitutional liquation induced by Nb-rich carbides (Ref 25, 26). In thermal cycle of multipass laser … WebAfter 1 hour at 1200°C, there were no signs of grain boundary liquation in either the A286 or the A286 plus boron steel At 1250°C the steel containing boron showed signs of eutectic liquation. At 1500°C theeutectic boride had increased in quantity and the A286 steel had alsocommenced to liquate.
Grain boundary liquation
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WebMar 14, 2016 · Research on the Grain Boundary Liquation Mechanism in Heat Affected Zones of Laser Forming Repaired K465 Nickel-Based Superalloy. Next Article in Special Issue. Reaction Behavior of Phosphorus in Coal-Based Reduction of an Oolitic Hematite Ore and Pre-Dephosphorization of Reduced Iron. WebOct 7, 2024 · Solidification grain boundary migration (SGBM) occurs in metals and alloys manufactured by casting, welding, or 3D printing, and it affects material properties, but its …
WebJul 1, 1992 · The U.S. Department of Energy's Office of Scientific and Technical Information WebThe grain size of a UNCD film determines the sp 2 and hydrogen content. It follows that smaller grains result in higher grain-boundary (GB) areas, which in turn leads to higher …
WebMar 5, 1998 · Therefore, it is concluded that the extent of B segregation, to which liquation of grain boundaries in the H AZ during welding has been attributed, is greater on random boundaries owing to their ability to accommodate a large number of B atoms in comparison with the low Σ boundaries leading to their liquation during Gleeble simulation. WebNov 12, 2024 · Figure 6 shows the formation of grain boundary liquation and liquation cracks in HAZ. As can be seen, most of the mentioned phases have contributed to the …
WebFeb 1, 2024 · The grain boundary segregation decreases and the threshold tensile stress of solid-liquid interfacial decohesion across the intergranular liquid film simultaneously …
WebGrain boundary regions in the heat-affected zone (HAZ) of arc welds, in a solution treated Al-3Cu alloy, were examined for liquation susceptibility. The welding experiments … patrick russell artistWebThe mechanism of serrated grain boundary formation and its effect on liquation behaviour have been studied in a wrought nickel-based superalloy – Alloy 263. It was newly discovered that grain boundaries are considerably serrated in the absence of γ ′-phase or M 23 C 6 at the grain boundaries. An electron energy-loss spectroscopy study ... patrick russell ddsWebThe mechanism of serrated grain boundary formation and its effect on liquation behaviour have been studied in a wrought nickel-based superalloy – Alloy 263. It was newly … patrick russo dentistWebThe mechanism for HAZ (heat-affected zone) liquation of alloy 617B during gas tungsten arc welding (GTAW) was investigated. Welding thermal simulation work was conducted to investigate the effects of thermal parameters (peak temperature, holding time, and thermal cycle numbers) on M23C6 carbides’ evolutionary behavior in nickel-based alloy … patrick russell cell phoneWebMar 15, 2016 · The damaged K465 nickel-based superalloy parts were repaired by laser forming repair technology. The cracking characteristics and grain boundary liquation in heat affected zones were investigated by optical microscopy (OM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). It was found that the … patrick ryan alconWebSep 15, 2024 · The as-received powder batch exhibits mostly a spherical morphology with some satellites. The powder characteristics are summarised as follows: D50 = 75 μm, a powder bed density of 53.6% and a flow time of 16.0 ± 0.1 s for 50 g of powders going through a 2.54 mm diameter orifice (Hall flowmeter). 2.2. Selective electron beam melting patrick rutterWeb2、anfield.ac.uk*,bp.colegrovecranfield.ac.uk,cz.zhang.ircbham.ac.uk*Corresponding authorKeywords:Liquation cracking,Nickel Superalloy welds,Laser welding,Cold Metal Transfer,CMT,Strain age cracking,Rene 80AbstractThe nickel-base superalloy Rene 80 is considered very susceptible to liquation and strain patrick ruzzica