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Title: Evaluation of fracture properties of cold deformed 450 YS TMCP steel

Abstract

In the present study, 450 YS TMCP steel of 20 mm thickness was used to characterize the cold deformation capacity and respective mechanical and fracture toughness properties. The present work is part of a joint research project by the Dillinger Huette and GKSS Research Center on the cold deformation, weldability and various fracture aspects of the 450 YS TMCP steel. The paper, however, only refers to the investigation on cold deformation and respective fracture characteristics of the 450 YS TMCP steel. In particular, it is aimed at understanding the effect of cold deformation and anisotropy on the fracture behavior through tensile, Charpy-V notch impact, CTOD and wide-plate testing as well as via microstructural examination. As part of the program, tests were performed at RT, {minus}40 C and {minus}80 C on specimens machined from plates in six conditions, namely: (1) as-rolled (0% CD), (2) 5% cold deformed (pre-strained in tension) (5% CD), (3) 10% cold deformed (pre-strained in tension) (10% CD), (4) as-rolled + SR (580 C for 1 hour) (0% CD + SR), (5) 5% cold deformed + SR (5% CD + SR) and (6) 10% cold deformed + SR (10% CD + SR). An increasing degree of cold deformationmore » increased both YS and TS combined with a reduction in ductility and toughness. The shift of the CVN transition curve was of the same order as experienced for normalized and Q+T steels. Thanks to the excellent as-rolled properties, even after 10% cold deformation, impact requirements were satisfied at least down to {minus}50 C. The YS to TS ratio was increased and was highest with the specimen axis parallel to the rolling and straining direction. The SR helped to regain a ratio of 0.90 even for 10% cold deformation.« less

Authors:
; ;  [1];  [2]
  1. GKSS Research Center, Geesthacht (Germany). Inst. of Materials Research
  2. Dillinger Huette AG, Saar (Germany). Welding Lab.
Publication Date:
OSTI Identifier:
27948
Report Number(s):
CONF-940230-
ISBN 0-7918-1266-9; TRN: IM9516%%74
Resource Type:
Book
Resource Relation:
Conference: 13. international conference on offshore mechanics and Arctic engineering (OMAE-13), Houston, TX (United States), 27 Feb - 3 Mar 1994; Other Information: PBD: 1994; Related Information: Is Part Of OMAE 1994. Volume 3: Materials Engineering; Salama, M.M.; Toyoda, Masao; Lui, S.; Dos Santos, J.F.; Kocak, M.; Patterson, E.A.; Berge, S. [eds.]; PB: 438 p.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; STEELS; FRACTURE PROPERTIES; THERMOMECHANICAL TREATMENTS; CHARPY TEST; TENSILE PROPERTIES; FRACTURE MECHANICS; STRAIN AGING; CHEMICAL COMPOSITION; MECHANICAL PROPERTIES; MICROSTRUCTURE; EXPERIMENTAL DATA

Citation Formats

Dobi, D, Kocak, M, Petrovski, B I, and Hanus, F. Evaluation of fracture properties of cold deformed 450 YS TMCP steel. United States: N. p., 1994. Web.
Dobi, D, Kocak, M, Petrovski, B I, & Hanus, F. Evaluation of fracture properties of cold deformed 450 YS TMCP steel. United States.
Dobi, D, Kocak, M, Petrovski, B I, and Hanus, F. Sat . "Evaluation of fracture properties of cold deformed 450 YS TMCP steel". United States.
@article{osti_27948,
title = {Evaluation of fracture properties of cold deformed 450 YS TMCP steel},
author = {Dobi, D and Kocak, M and Petrovski, B I and Hanus, F},
abstractNote = {In the present study, 450 YS TMCP steel of 20 mm thickness was used to characterize the cold deformation capacity and respective mechanical and fracture toughness properties. The present work is part of a joint research project by the Dillinger Huette and GKSS Research Center on the cold deformation, weldability and various fracture aspects of the 450 YS TMCP steel. The paper, however, only refers to the investigation on cold deformation and respective fracture characteristics of the 450 YS TMCP steel. In particular, it is aimed at understanding the effect of cold deformation and anisotropy on the fracture behavior through tensile, Charpy-V notch impact, CTOD and wide-plate testing as well as via microstructural examination. As part of the program, tests were performed at RT, {minus}40 C and {minus}80 C on specimens machined from plates in six conditions, namely: (1) as-rolled (0% CD), (2) 5% cold deformed (pre-strained in tension) (5% CD), (3) 10% cold deformed (pre-strained in tension) (10% CD), (4) as-rolled + SR (580 C for 1 hour) (0% CD + SR), (5) 5% cold deformed + SR (5% CD + SR) and (6) 10% cold deformed + SR (10% CD + SR). An increasing degree of cold deformation increased both YS and TS combined with a reduction in ductility and toughness. The shift of the CVN transition curve was of the same order as experienced for normalized and Q+T steels. Thanks to the excellent as-rolled properties, even after 10% cold deformation, impact requirements were satisfied at least down to {minus}50 C. The YS to TS ratio was increased and was highest with the specimen axis parallel to the rolling and straining direction. The SR helped to regain a ratio of 0.90 even for 10% cold deformation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {12}
}

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