Delamination of pipeline steels: determination of an anisotropic cleavage criterion

被引:6
作者
Tankoua, F. [1 ]
Crepin, J. [1 ]
Thibaux, P. [2 ]
Arafin, M. [2 ]
Cooreman, S. [2 ]
Gourgues, A. F. [1 ]
机构
[1] MINES ParisTech, Ctr Mat, UMR CNRS 7633, F-91003 Evry, France
[2] ArcelorMittal R&D Gent, B-9060 Zelzate, Belgium
关键词
Delamination fracture; anisotropy; cleavage; microtexture; pipeline steels; ALLOYS; CRACKS;
D O I
10.1051/meca/2014001
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Cleavage fracture anisotropy has been studied on a ferrite-bainite low alloy pipeline steel plate. Mechanical tests have been performed on smooth and notched bars taken along the three principal directions of the plate at temperatures between 20 degrees C and -196 degrees C, and analyzed by finite element calculations with an anisotropic plasticity model. The fracture mode of specimens tested along the normal direction differs from that of specimens taken along the two other directions, together with a lower critical cleavage stress. This difference seems to be related to microtexture anisotropy and might explain the sensitivity of this steel to delamination at low temperatures.
引用
收藏
页码:45 / 50
页数:6
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