The Paton Welding Journal, 2010, №04



2010 №04 (03)

2010 №04 (05)

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TPWJ, 2010, #4, 14-21 pages
 
EVALUATION OF TEMPERATURE SHIFT DEPENDING UPON THE SPECIMEN THICKNESS BY THE FORCE AND DEFORMATION CRITERIA OF FRACTURE MECHANICS


Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                       0957-798X (print)
Issue                       № 4, 2010 (April)
Pages                      14-21
 
 
Authors
V.P. DYADIN
E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
Relationships between impact toughness KCV and crack resistance characteristics of a material, derived by the E.O. Paton Electric Welding Institute, are applicable for a case where the plane-strain state forms within the defect zone. If this condition is violated, evaluation of crack resistance of structural members is not always optimal. To solve this problem, it is suggested that temperature shift in basic curves of fracture toughness characteristics should be evaluated depending upon the thickness of an object under investigation. It is shown that, in addition to thickness of a specimen, the temperature shift should also be evaluated by allowing for strength properties of a material and its welded joints.
 
 
Keywords: impact toughness, Charpy specimen, crack resistance characteristics, plane strain, thickness effect, temperature shift, strain hardening of material
 
 
Received:                ??.??.??
Published:               28.04.10
 
 
References
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2. Girenko, V.S., Dyadin, V.P. (1986) Relationships between impact toughness and fracture mechanics criteria for structural materials and their welded joints. Ibid., 10, 61-62.
3. ASTM E 1921-97: Standard test method for the determination of reference temperature T0 for ferritic steels in the transition range. Publ. 1998.
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7. Kawano, S., Shimizu, S., Nagai, K. (1983) Fracture mechanics approach to thickness effects on brittle fracture toughness under large scale yielding of mild steel. Naval Architecture and Ocean Eng., 21, 113.
8. Kawano, S., Shimizu, S., Nagai, K. et al. (1984) Thickness effects on brittle fracture toughness of HT60 under large scale yielding. Transact. of West-Japan Society of Naval Architecture, 68, 207.
9. Kawano, S., Tada, M., Yajima, H. et al. (1987) Thickness effects on brittle fracture toughness of weld metal of high tensile strength steel. Ibid., 18(1), 68-76.
10. Paris, P.C. (1977) Fracture mechanics in the elastic-plastic regime. In: ASTM STP 631, 3-27.
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