Plastic pre-compression and creep damage effects on the fracture toughness behaviour of Type 316H stainless steel

Ali Mehmanparast; Catrin M. Davies; David W. Dean; Kamran M. Nikbin

doi:10.1016/j.engfracmech.2014.10.005

Plastic pre-compression and creep damage effects on the fracture toughness behaviour of Type 316H stainless steel

Ali Mehmanparast^*, Catrin M. Davies, David W. Dean, Kamran M. Nikbin

^*Corresponding author for this work

Naval Architecture, Ocean And Marine Engineering

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

13 Citations (Scopus)

Abstract

The influence of inelastic damage in the form of plastic pre-strain and creep damage, on fracture toughness of Type 316H stainless steel has been examined. Creep damage has been introduced into the 8% pre-compressed material by interrupting creep crack growth tests. Comparisons have been made between the fracture toughness test results from the as-received, pre-compressed and creep damaged materials. Furthermore, the effects of creep crack discontinuities on the crack tip strain fields have been examined by digital image correlation measurements. Inelastic damage was found to reduce the fracture toughness of the material, with creep damage having more severe effects than pre-strain.

Original language	English
Pages (from-to)	26-37
Number of pages	12
Journal	Engineering Fracture Mechanics
Volume	131
DOIs	https://doi.org/10.1016/j.engfracmech.2014.10.005
Publication status	Published - 1 Nov 2014

Keywords

316H stainless steel
crack discontinuity
creep damage
DIC measurements
fracture toughness
micro cracks
pre-straining

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10.1016/j.engfracmech.2014.10.005

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title = "Plastic pre-compression and creep damage effects on the fracture toughness behaviour of Type 316H stainless steel",

abstract = "The influence of inelastic damage in the form of plastic pre-strain and creep damage, on fracture toughness of Type 316H stainless steel has been examined. Creep damage has been introduced into the 8% pre-compressed material by interrupting creep crack growth tests. Comparisons have been made between the fracture toughness test results from the as-received, pre-compressed and creep damaged materials. Furthermore, the effects of creep crack discontinuities on the crack tip strain fields have been examined by digital image correlation measurements. Inelastic damage was found to reduce the fracture toughness of the material, with creep damage having more severe effects than pre-strain.",

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note = "Funding Information: The authors would like to thank Mr Roger Smith and Mr David McLennon from EDF Energy for their technical assistance with fracture toughness testing. This work has been supported by EDF Energy and EPSRC under Grant EP/I004351/1 . Publisher Copyright: {\textcopyright} 2014 Elsevier Ltd.",

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AU - Nikbin, Kamran M.

N1 - Funding Information: The authors would like to thank Mr Roger Smith and Mr David McLennon from EDF Energy for their technical assistance with fracture toughness testing. This work has been supported by EDF Energy and EPSRC under Grant EP/I004351/1 . Publisher Copyright: © 2014 Elsevier Ltd.

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N2 - The influence of inelastic damage in the form of plastic pre-strain and creep damage, on fracture toughness of Type 316H stainless steel has been examined. Creep damage has been introduced into the 8% pre-compressed material by interrupting creep crack growth tests. Comparisons have been made between the fracture toughness test results from the as-received, pre-compressed and creep damaged materials. Furthermore, the effects of creep crack discontinuities on the crack tip strain fields have been examined by digital image correlation measurements. Inelastic damage was found to reduce the fracture toughness of the material, with creep damage having more severe effects than pre-strain.

AB - The influence of inelastic damage in the form of plastic pre-strain and creep damage, on fracture toughness of Type 316H stainless steel has been examined. Creep damage has been introduced into the 8% pre-compressed material by interrupting creep crack growth tests. Comparisons have been made between the fracture toughness test results from the as-received, pre-compressed and creep damaged materials. Furthermore, the effects of creep crack discontinuities on the crack tip strain fields have been examined by digital image correlation measurements. Inelastic damage was found to reduce the fracture toughness of the material, with creep damage having more severe effects than pre-strain.

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KW - crack discontinuity

KW - creep damage

KW - DIC measurements

KW - fracture toughness

KW - micro cracks

KW - pre-straining

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JO - Engineering Fracture Mechanics

JF - Engineering Fracture Mechanics

ER -

Plastic pre-compression and creep damage effects on the fracture toughness behaviour of Type 316H stainless steel

Abstract

Keywords

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