In Situ Study of Fracture Process for B-Class Shipbuilding Steel

Hui Bin Wu; Guo Li Liang; Y.H. Wen; C.C. Yang

doi:10.4028/www.scientific.net/MSF.704-705.1310

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HomeMaterials Science ForumMaterials Science Forum Vols. 704-705In Situ Study of Fracture Process for B-Class...

In Situ Study of Fracture Process for B-Class Shipbuilding Steel

Abstract:

Crack initiation, propagation and microfracture processes of B-class shipbuilding steel have been investigated by using an in-situ tensile stage installed inside a scanning electron microscope chamber, meanwhile the secondary crack propagation at low temperature brittle fracture has also been studied. It is revealed that micro cracks always nucleated at the notch of specimens due to the stress concentration and then propagate along the interface of ferrite-pearlite. The plastic deformation of polygonal ferrite occurred in the loading process, the cracks propagated as “Z” morphology in the matrix. In the low temperature brittle fracture zone, the secondary crack propagated through the ferrite matrix in the manner of transgranular crack. When the secondary crack propagated to pearlite region, the intragranular crack and transgranular crack were observed in the pearlite region .

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Periodical:

Materials Science Forum (Volumes 704-705)

Pages:

1310-1315

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.704-705.1310

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Online since:

December 2011

Authors:

Hui Bin Wu, Guo Li Liang, Y.H. Wen, C.C. Yang

Keywords:

B-Class Shipbuilding Steel, In Situ Tensile Test, Micro-Crack

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