In Situ Observation on Fracture Behavior of 800MPa Grade Dual-Phase Steel

Abstract:

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The tensile process of 800MPa grade dual-phase steel was observed in-situ by SEM. The initiation and propagation of crack in dual-phase steel, the initiation of micro-pores, the deformation behavior of ferrite and martensite were analyzed in this paper. The results show that the main crack goes across the soft ferrite and around the hard martensite during its propagation in the beginning. When the applied stress is small, the micro-pores are easy to form inside the ferrite grain or on the interface of ferrite and martensite. The micro-pores can also form in the fracture site of martensite with the increase of applied stress. The fracture morphology of the dual-phase steel is dimple and the formation of fracture belongs to plastic fracture.

Info:

Periodical:

Advanced Materials Research (Volumes 299-300)

Edited by:

Jianzhong Wang and Jingang Qi

Pages:

385-389

DOI:

10.4028/www.scientific.net/AMR.299-300.385

Citation:

G. C. Jin et al., "In Situ Observation on Fracture Behavior of 800MPa Grade Dual-Phase Steel", Advanced Materials Research, Vols. 299-300, pp. 385-389, 2011

Online since:

July 2011

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Price:

$35.00

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