Evolution of a Two-Layer Oxide Coating on the Steel Surface of the Primary Coolant Circuit in the Course of Nuclear Power Plant Operation

Alekseev, V. V.; Orlova, E.A.; Kozlov, F. A.; Varseev, E.V.

doi:10.1007/s10891-016-1375-y

Cited by 2 publications

(4 citation statements)

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“…The surface temperature mainly caused the decrease in hardness values. The areas with crack density and cracks at their highest and deepest values recorded the lowest hardness values [28]. At temperatures of about 500 • C, the hardness value of the materials was minimized and declined considerably at high temperatures [35,36].…”

Section: Hardness Propertiesmentioning

confidence: 96%

Section: Hardness Propertiesmentioning

confidence: 97%

“…At temperatures of about 500 • C, the hardness value of the materials was minimized and declined considerably at high temperatures [35,36]. At above 500 • C, Cr, Mo, and V carbides hardened, and steadily decreased the material's hardness [28]. Similarly, variations in the microstructure of the material also reduced the hardness of the material.…”

Section: Hardness Propertiesmentioning

confidence: 99%

“…The interaction between the die surface and the hot melt resulted also in decreased physical properties in terms of the strength and resistance of the material [26]. Furthermore, there was a local plastic distortion due to the increase in the local cracks, which eventually spread failures as die usage increases [27,28]. In addition, these areas experienced melt shocks, resulting in a decrease in the die life.…”

Section: Metallographic Studymentioning

confidence: 99%

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Thermally-Induced Crack Evaluation in H13 Tool Steel

Abdulhadi

Ahmad

Ismail

et al. 2017

Metals

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This study reported the effect of thermal wear on cylindrical tool steel (AISI H13) under aluminum die-casting conditions. The AISIH13 steels were immersed in the molten aluminum alloy at 700 • C before water-quenching at room temperature. The process involved an alternating heating and cooling of each sample for a period of 24 s. The design of the immersion test apparatus stylistically simulated aluminum alloy dies casting conditions. The testing phase was performed at 1850, 3000, and 5000 cycles. The samples were subjected to visual inspection after each phase of testing, before being examined for metallographic studies, surface crack measurement, and hardness characteristics. Furthermore, the samples were segmented and examined under optical and Scanning Electron Microscopy (SEM). The areas around the crack zones were additionally examined under Energy Dispersive X-ray Spectroscopy (EDXS). The crack's maximum length and Vickers hardness profiles were obtained; and from the metallographic study, an increase in the number of cycles during the testing phase resulted in an increase in the surface crack formation; suggesting an increase in the thermal stress at higher cycle numbers. The crack length of Region I (spherically shaped) was about 47 to 127 µm, with a high oxygen content that was analyzed within 140 µm from the surface of the sample. At 700 • C, there is a formation of aluminum oxides, which was in contact with the surface of the H13 sample. These stresses propagate the thermal wear crack length into the tool material of spherically shaped Region I and cylindrically shape Region II, while hardness parameters presented a different observation. The crack length of Region I was about 32% higher than the crack length of Region II.

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Section: Hardness Propertiesmentioning

confidence: 96%

Section: Hardness Propertiesmentioning

confidence: 97%