A Consideration of Cleavage Crack Propagation in Fe2Si Steel

Fabio Sorbello; Peter E.J. Flewitt; A.G. Crocker; Gillian E. Smith

doi:10.4028/www.scientific.net/KEM.385-387.1

Paper Titles

Committees

Preface

A Consideration of Cleavage Crack Propagation in Fe₂Si Steel
p.1

Fatigue Crack Growth Rate Analysis in a Titanium Alloy
p.5

A Criterion for Crack Kinking Out of an Interface
p.9

Geomatrically Nonlinear Analysis of Cracked Stiffened Curved Panels by DBEM
p.13

A Finite Element Analysis of Scarf Joint for Controlling the Triaxiality Function in Adhesive Bonding
p.17

A Study of the Dynamic Plane Strain Fracture Toughness of Concrete by SHPB
p.21

About the Effects of Residual Stress States Coming from Manufacturing Processes on the Behaviour of Riveted Joints
p.25

HomeKey Engineering MaterialsKey Engineering Materials Vols. 385-387A Consideration of Cleavage Crack Propagation in...

A Consideration of Cleavage Crack Propagation in Fe₂Si Steel

Abstract:

It is well established that within the lower-shelf temperature range of Fe2-3Si polycrystalline steels, the brittle fracture occurs predominately by transgranular cleavage, unless subject to embrittling heat-treatments. The cleavage fracture develops on the well established {001} planes of the bcc structure. In this paper we revisit the growth, of these cleavage cracks by considering crack propagation in single crystals of Fe2Si steel. Three point bend specimens manufactured from oriented crystals have been tested by impact loading at a temperature of -196°C. High spatial resolution focused ion beam imaging combined with ion milling is used to examine in detail the crack propagation path and has provided a new insight into the mechanisms involved. In particular it has been established that within the process zone of the propagating cracks local strain is accommodated by the formation of {112} twins. The results are discussed with respect to the overall crack propagation mechanism.

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Periodical:

Key Engineering Materials (Volumes 385-387)

Pages:

1-4

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.385-387.1

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Online since:

July 2008

Authors:

Fabio Sorbello, Peter E.J. Flewitt, A.G. Crocker, Gillian E. Smith

Keywords:

Brittle Fracture, Fe₂Si Steel, Focused Ion Beam (FIB), Fractography, Single Crystal, Twin

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