The tensile properties and fracture toughness of a zr3al-based alloy after fast neutron irradiation PDF Download
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Author: H. E. Rosinger
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: H. E. Rosinger
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Atomic Energy of Canada Limited
Publisher:
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Category :
Languages : en
Pages :
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Author: H. E. Rosinger
Publisher: Pinawa, Man. : Whiteshell Nuclear Research Establishment
ISBN:
Category :
Languages : en
Pages : 35
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Author: Atomic Energy of Canada Limited
Publisher:
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Category :
Languages : en
Pages :
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Author: F. H. Huang
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 446
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Author: A. L. Bement
Publisher:
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Category : Zirconium-tin alloys
Languages : en
Pages : 416
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Author:
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Category : Canada
Languages : en
Pages : 558
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Author: WJ. Mills
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Category : Elevated-temperature tests
Languages : en
Pages : 17
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The effect of fast-neutron irradiation on the fracture toughness behavior of Alloy A-286 was characterized at 24 and 427°C using linear-elastic KIc and elastic-plastic JIc fracture mechanics techniques. The fracture toughness was found to decrease continuously with increasing irradiation damage at both test temperatures. In the unirradiated and low fluence conditions, specimens displayed appreciable plasticity prior to fracture, and equivalent KIc-values were determined from JIc fracture toughness results. At high irradiation exposure levels, specimens exhibited a brittle KIc fracture mode. The 427°C fracture toughness fell from 129 MPa?m in the unirradiated condition to 35 MPa?m at an exposure of 16.2 dpa (total fluence of 5.2 x 1022 n/cm2). Room-temperature fracture toughness values were consistently 40 to 60% higher than the 427°C values. Electron fractography revealed that the reduction in fracture resistance was caused by a fracture mechanism transition from ductile microvoid coalescence to channel fracture.
Author:
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Category : Nuclear energy
Languages : en
Pages : 1180
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Author: DN. Braski
Publisher:
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Category : Frank loops
Languages : en
Pages : 16
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Small tensile specimens of the (Fe0.61Ni0.39)3V long-range-ordered alloy were irradiated in the ORR to 4 dpa at 523, 623, and 823 K and subsequently tested at the same respective temperatures. The alloy remained ordered after irradiation at all three temperatures. Irradiation at 523 and 623 K increased the yield strength of the material by producing Frank loops in the microstructure and reduced the total elongation. The low strain hardening observed was attributed to planar slip. Irradiation at 823 K embrittled the alloy. Premature failure was apparently initiated by helium bubbles on sigma phase boundaries which grew rapidly during the test to form microcracks. Fracture occurred after a microcrack propagated across grain boundaries that were weakened by helium and possibly sulfur. Modifying the composition of LRO alloys to eliminate sigma phase should lead to improved performance under neutron irradiation.
