Fatigue and fracture of a 316 stainless steel metal matrix composite reinforced with 25% titanium diboride

D.H. Bacon; L. Edwards; J.E. Mofffatt; Michael E. Fitzpatrick

doi:10.1016/j.ijfatigue.2012.09.016

Fatigue and fracture of a 316 stainless steel metal matrix composite reinforced with 25% titanium diboride

D.H. Bacon, L. Edwards, J.E. Mofffatt, Michael E. Fitzpatrick

College of Engineering, Environment & Science

Research output: Contribution to journal › Article › peer-review

44 Citations (Scopus)

Abstract

Fatigue and fracture mechanisms have been studied in a steel-based metal matrix composite (MMC), comprising a 316L austenitic matrix reinforced with 25 wt.% particulate titanium diboride (TiB2). The fracture toughness was determined in the as-HIPped condition as being slightly below 30 MPa√m. Fatigue crack growth rates have been determined, and corrected for the effects of crack closure. The fracture surfaces have been studied to determine the mechanisms of damage during crack advance, which are determined as matrix fatigue, reinforcement particle fracture, and ductile rupture of the matrix. We show that the occurrence of damage mechanisms during fatigue of the material is linked to Kmax, rather than to ΔK. This is rationalised in terms of a semi-cohesive process zone within the monotonic plastic zone ahead of the crack tip.

Original language	English
Pages (from-to)	39-47
Journal	International Journal of Fatigue
Volume	48
Issue number	2013
DOIs	https://doi.org/10.1016/j.ijfatigue.2012.09.016
Publication status	Published - Mar 2013

Bibliographical note

This paper is available on the Open University repository at: http://oro.open.ac.uk/35760/1/1-s2.0-S0142112312002800-main.pdf

Keywords

Metal matrix composites
Fatigue crack growth
Particle fracture
Fracture surface analysis

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10.1016/j.ijfatigue.2012.09.016

Cite this

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title = "Fatigue and fracture of a 316 stainless steel metal matrix composite reinforced with 25% titanium diboride",

abstract = "Fatigue and fracture mechanisms have been studied in a steel-based metal matrix composite (MMC), comprising a 316L austenitic matrix reinforced with 25 wt.% particulate titanium diboride (TiB2). The fracture toughness was determined in the as-HIPped condition as being slightly below 30 MPa√m. Fatigue crack growth rates have been determined, and corrected for the effects of crack closure. The fracture surfaces have been studied to determine the mechanisms of damage during crack advance, which are determined as matrix fatigue, reinforcement particle fracture, and ductile rupture of the matrix. We show that the occurrence of damage mechanisms during fatigue of the material is linked to Kmax, rather than to ΔK. This is rationalised in terms of a semi-cohesive process zone within the monotonic plastic zone ahead of the crack tip.",

keywords = "Metal matrix composites, Fatigue crack growth, Particle fracture, Fracture surface analysis",

author = "D.H. Bacon and L. Edwards and J.E. Mofffatt and Fitzpatrick, {Michael E.}",

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AU - Bacon, D.H.

AU - Edwards, L.

AU - Mofffatt, J.E.

AU - Fitzpatrick, Michael E.

N1 - This paper is available on the Open University repository at: http://oro.open.ac.uk/35760/1/1-s2.0-S0142112312002800-main.pdf

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AB - Fatigue and fracture mechanisms have been studied in a steel-based metal matrix composite (MMC), comprising a 316L austenitic matrix reinforced with 25 wt.% particulate titanium diboride (TiB2). The fracture toughness was determined in the as-HIPped condition as being slightly below 30 MPa√m. Fatigue crack growth rates have been determined, and corrected for the effects of crack closure. The fracture surfaces have been studied to determine the mechanisms of damage during crack advance, which are determined as matrix fatigue, reinforcement particle fracture, and ductile rupture of the matrix. We show that the occurrence of damage mechanisms during fatigue of the material is linked to Kmax, rather than to ΔK. This is rationalised in terms of a semi-cohesive process zone within the monotonic plastic zone ahead of the crack tip.

KW - Metal matrix composites

KW - Fatigue crack growth

KW - Particle fracture

KW - Fracture surface analysis

U2 - 10.1016/j.ijfatigue.2012.09.016

DO - 10.1016/j.ijfatigue.2012.09.016

M3 - Article

SN - 0142-1123

VL - 48

SP - 39

EP - 47

JO - International Journal of Fatigue

JF - International Journal of Fatigue

IS - 2013

ER -

Fatigue and fracture of a 316 stainless steel metal matrix composite reinforced with 25% titanium diboride

Abstract

Bibliographical note

Keywords

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