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Ductile-brittle transition temperatures and dynamic fracture toughness of 9Cr-1Mo steel

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dc.contributor.authorMoitra, A.
dc.contributor.authorSreenivasan, P.R.
dc.contributor.authorMannan, S.L.
dc.contributor.authorSingh, V.
dc.date.accessioned2025-03-04T05:56:18Z
dc.date.available2025-03-04T05:56:18Z
dc.date.issued2005
dc.description.abstractThe ductile-brittle transition temperature (DBTT) of 9Cr-1Mo steel was characterized by an RTNDT-based KIR curve approach and a reference temperature (T0)-based master curve (MC) approach. The MC was developed at a dynamic loading condition (loading rate of 5.12 m/s), using precracked Charpy V-notch (PCVN) specimens, and the reference temperature was termed T0dy. The RTNDT and T0dy were determined to be -25 °C and -52 °C, respectively. The T0dy was also estimated from instrumented CVN tests, using a modified Schindler procedure to evaluate KJd; the result shows close agreement with that obtained from the PCVN tests. The ASME KIR-curve approach proves to be too conservative compared to the obtained trend of the fracture toughness with temperature. The cleavage fracture stress, σf*, estimated from the critical length, l*, shows good agreement with that estimated from the load-temperature diagram (2400 to 2450 MPa), which was constructed from the CVN test results. The crack initiation mechanism has been identified as decohesion of the particle-matrix interface, rather than as the fracture of the particles.
dc.identifier.doihttps://doi.org/10.1007/s11661-005-0069-4
dc.identifier.issn10735623
dc.identifier.urihttps://dl.bhu.ac.in/ir/handle/123456789/87719
dc.publisherMinerals, Metals and Materials Society
dc.titleDuctile-brittle transition temperatures and dynamic fracture toughness of 9Cr-1Mo steel
dc.typeArticle
dspace.entity.typePublication
journal.titleMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
journalvolume.identifier.volume36

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2005