The 420 MPa grade offshore engineering steels with the different Mo contents were fabricated through Ca deoxidation. effect of content on microstructure and impact toughness coarse-grained heat-affected zone (CGHAZ) after welding heat input 100 kJ/cm investigated by simulation high-temperature laser scanning confocal microscopy (HTLSCM). As is increased from 0.08 to 0.16 wt%, at ?40°C 15 160 J,...

Cold gas dynamic spray (CS) is a unique technique for depositing material using high-strain-rate solid-state deformation. A major challenge this its dependence on the powder’s properties, and another lack of standards assessing them between lots manufacturers. The motivation research was to understand variability in powder atomization techniques stainless steel powders their subsequent properti...

This research, for the first time, conducted a comprehensive study into effect of modern Severe Plastic Deformation technique, “Indirect Extrusion Angular Pressing (IEAP)”, on microstructural refinement niobium and subsequent impact tribological properties. The samples were processed 4, 9, 12 passes IEAP then exposed to Pin-on-disk wear test in dry sliding conditions. results showed that grain ...

The Ni-based Hastelloy X (HX) superalloy is widely used in aero-engine components because of its exceptional high-temperature strength and oxidation resistance. Given the complex structure such parts, additive manufacturing (AM) technologies as laser powder bed fusion (LPBF) are employed to manufacture these components. HX alloy suffers from crack susceptibility during LPBF process, however. In...

Extremely rapid heating and cooling rates during the additive manufacturing (AM) process generate complicated thermal cycles, which affect microstructure evolution ultimate mechanical properties of alloy. In this paper, FGH96 blocks with a height 6 mm were prepared by selective laser melting (SLM) was characterized scanning electron microscopy (SEM) transmission (TEM). Comparing specimens varyi...

Abstract The QP980-DP980 dissimilar steel joints were fabricated by fiber laser welding. weld zone (WZ) was fully martensitic structure, and heat-affected (HAZ) contained newly-formed martensite partially tempered (TM) in both steels. super-critical HAZ of the QP980 side had higher microhardness (~ 549.5 Hv) than that WZ due to finer martensite. A softened present DP980, dropped DP980 ? 21.8 Hv...

• Curvature-driven subgrain coarsening simulations mimic recrystallization in IF-steel. After the simulation, texture components appear, as also found experimentally. Subgrains near non-intergranular HAGBs do not have a size advantage. Shear/deformation band nucleation occurs by matrix subgrains invading bands. When deformation bands intersect abutting kinetic and A cellular automaton algorithm...

Abstract Tungsten is the leading plasma-facing material (PFM) for nuclear fusion applications. It faces severe operating conditions, including intense hydrogen plasma exposure and high-cycle transient heat loading, which create various defects in tungsten. Additionally, have often already been introduced during manufacturing. Little understood regarding synergistic effect of such on lifetime tu...

The 2195 Al–Li alloy, as one of the representative third-generation alloys, has extensive applications in lightweight aerospace structures. In this paper, anisotropy mechanical properties and microstructure evolution alloy sheets were investigated under a strain rate 0.01, 0.1, 1 s−1 temperature 440 500 °C. Experimental results showed that hot tensile sheet exhibited strong dependence on loadin...