Fracture complexity of pressure vessel steels

Das, Avimanyu

doi:10.1080/14786435.2017.1367857

Cited by 19 publications

(2 citation statements)

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“…The steel was received as rectangular blocks in quenched-tempered conditions, which is a tempered bainite microstructure (AR-initial as received microstructure). Mechanical properties of the material have been experimentally investigated to be: yield strength (YS)-455 MPa, tensile strength (UTS)-620 MPa, and total elongation (EL)-20.7% under room temperature and strain rate 4 × 10 −3 s −1 [17]. The hardness of the alloy was found to be ~ 200 ± 5 Hv [17].…”

Section: Alloy and Propertiesmentioning

confidence: 99%

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Effect of Cooling Rate on the Microstructure of a Pressure Vessel Steel

Das

Kapoor

2019

Metallogr. Microstruct. Anal.

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The present article thoroughly explores the effect of cooling rate on various microstructural features of a reactor pressure vessel steel (20MnMoNi55). For this, dilatometric experiments were performed at different cooling rates. Optical microscopy and electron backscatter diffraction were used to measure different microstructural parameters. Continuous cooling from 0.15 to 0.3 °C/s revealed ferrite and bainite; only bainite is seen from 1 to 2 °C/s, both bainite and martensite were found in the regime 5 to 15 °C/s, and complete martensitic transformation was observed at cooling rate 20 °C/s and above. With increase in cooling rate, the fraction of low angle boundary decreased and that of high angle boundary increased. The nature of grain size distribution was found to be cooling rate sensitive.

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Section: Alloy and Propertiesmentioning

confidence: 99%

“…The starting condition is a tempered bainite microstructure and is the condition in which this steel is generally used in the nuclear reactor pressure vessels [4,17]. [21,22] is summarized in Table 1.…”

Section: Continuous Cooling Transformationmentioning

confidence: 99%