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- W4382404890 abstract "Heat-resistant materials appropriate for use in long-term ultra-supercritical coal-fired power generation are increasingly important. To this end, we tested a series of 9.5Cr-1.5MoCoVNbNB heat-resistant steel samples at 620 °C under applied stresses of 155–225 MPa until rupture. The microstructural characteristics, cavity growth behavior, and fracture mechanism of the tensile rupture samples were investigated. Stress promotes the motion of dislocations density, subgrain formation, and cavity nucleation. The cavities continuously grow and coalesce, but the growth rates and coalescence rates may be lower under low stress values than those under high applied stress. A detailed assessment revealed two types of inclusions, BN and Al2O3, in the tested steel. The cavities around the BN inclusions tend to deform with stress, while those around the Al2O3 inclusions tend to promote nucleation of cracks. 9.5Cr-1.5MoCoVNbNB heat-resistant steel fracture is mainly induced by cavity coalescence around inclusions." @default.
- W4382404890 created "2023-06-29" @default.
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- W4382404890 date "2023-09-01" @default.
- W4382404890 modified "2023-09-24" @default.
- W4382404890 title "Cavity growth behavior and fracture mechanism of 9.5Cr-1.5MoCoVNbNB heat-resistant steel during long-term tensile rupture at 620 °C" @default.
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- W4382404890 doi "https://doi.org/10.1016/j.matchar.2023.113130" @default.
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