Investigation of Pre-Existing Pores in Creep Loaded 9Cr Steel

Yadav, Surya Deo; Rosc, J.; Sartory, Bernhard; Brunner, Roland; Sonderegger, Bernhard; Sommitsch, Christof; Poletti, Cecilia

doi:10.1007/978-3-319-48123-4_14

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…This is due to the nature of loading that is compressive in impression creep testing. As a consequence, creep cavities and local damage of specimen in terms of necking that occur in the tertiary creep regime of tensile creep [10,13,14,56] do not manifest in impression creep at smaller strains. It can be observed that with increase in temperature at a nearly constant punching stress resulted in higher indenter penetration rates.…”

Section: Microstructure Of Welds After Pwhtmentioning

confidence: 99%

“…P9 steel has also attracted the scientists and researchers to consider it for components in Fast Breeder Reactor (FBR) [8] as well as for the fabrication of hexcan wrapper fuel subassembly components. This steel belongs to the group of 9-12% Cr steels and the creep strength of this steel relies on its hierarchical microstructural and substructural features [9][10][11][12][13][14]. In as-received condition that is designated to normalised and tempered condition, P9 steel possesses plenty of interfaces such as boundaries of prior austenitic grains, block boundaries, packet boundaries, lath boundaries and subgrain boundaries.…”

Section: Introductionmentioning

confidence: 99%

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Zone-wise investigation of creep behaviour 9Cr–1Mo steel weld joints

Yadav

Vasantharaja

Riedlsperger

et al. 2019

Materials Science and Technology

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Distinct regions such as weld metal, heat-affected zone (HAZ) and base metal of P9 steel weld joints fabricated by various welding processes were investigated using impression creep testing. Smaller prior austenitic grain size, lower density of precipitates and dislocations resulted in faster recovery and higher creep rate of HAZ in comparison to the weld and base metal. Compared to base metal, shielded metal arc weld (SMAW) and activated tungsten inert gas (A-TIG) weld of the P9 steel weld joints exhibited better resistance to creep and displayed higher activation energy due to their coarser prior austenite grain size. A-TIG HAZ exhibited superior creep properties compared to the SMAW and TIG HAZ due to the presence of higher number density of precipitates.

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Section: Microstructure Of Welds After Pwhtmentioning

confidence: 99%