Impact toughness of 12Cr1MoV steel. Part 2 – Influence of high intensity ion beam irradiation on energy and deformation parameters and mechanisms of fracture

Impact toughness of 12Cr1MoV steel. Part 2 – Influence of high intensity ion beam irradiation on energy and deformation parameters and mechanisms of fracture

•Effects of high intensity ion beam irradiation on impact fracture of steel were investigated.•The physical regularities of irradiation effect is analyzed for 12Cr1MoV steel.•Reduction of fracture ductility for modified specimens was established and justified. The impact toughness of initial and irr...

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Bibliographic Details
Published in:Theoretical and applied fracture mechanics Vol. 83; pp. 82 - 92
Main Authors: Panin, Sergey V., Maruschak, P.O., Vlasov, I.V., Sergeev, V.P., Ovechkin, B.B., Neifeld, V.V.
Format: Journal Article
Language:English
Published: Elsevier Ltd 01-06-2016
Subjects:
Chromium molybdenum vanadium steels
Deterioration
Fracture
Fracture mechanics
Fracture toughness
Heat resistant steels
Impact strength
Impact toughness
Ion beam treatment
Ion beams
Irradiation
Martensitic stainless steels
Physical mesomechanics
Steels
Stress-strain relationships
Impact toughness
Fracture
Ion beam treatment
Physical mesomechanics
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Summary:•Effects of high intensity ion beam irradiation on impact fracture of steel were investigated.•The physical regularities of irradiation effect is analyzed for 12Cr1MoV steel.•Reduction of fracture ductility for modified specimens was established and justified. The impact toughness of initial and irradiated 12Cr1MoV steel Charpy specimens has been studied in the range of temperatures from 20°C to 600°C. In addition, it was found that ion beam treatment of steel deteriorates the impact toughness at the tested temperatures by 5–42%. Moreover, it was revealed that the increase of testing temperature decreases the difference between the fracture energies of initial and modified steel specimens. Also, the physical regularities of irradiation effect on microhardness and hardness of the treated surface were investigated. It was also revealed that irradiated specimens fracture via more brittle mechanism, which is related to both more severe stress–strain state at the notch tip and gradient alteration of properties in the subsurface layer.
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SourceType-Scholarly Journals-1
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content type line 23
ISSN:0167-8442
1872-7638
DOI:10.1016/j.tafmec.2015.12.009