Damage mechanisms and fracture toughness of GlidCop® CuAl25 IG0 copper alloy

Seppo Tähtinen (Corresponding Author), Anssi Laukkanen, Bachu Singh

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

Crack nucleation and growth behaviour are important parameters in deciding about the applicability of the dispersion strengthened copper alloy CuAl25 in components such as the first wall and divertor in ITER. The effective strain to fracture of notched tensile specimens decreased with increasing stress state triaxiality and with increasing temperature at constant constraint level following the Rice and Tracey model for void growth. In three point bend tests, the strain for stable crack initiation decreased significantly with increasing temperature. The CuAl25 alloy failed by a ductile microvoid mechanism where extensive void nucleation occurred at very low strains at grain boundaries with increasing stress state triaxiality. At elevated temperatures the fracture surface morphology changed from microvoid to intergranular fracture in three-point bend tests.
Original languageEnglish
Pages (from-to)1028 - 1032
Number of pages5
JournalJournal of Nuclear Materials
Volume283-287
Issue numberPart 2
DOIs
Publication statusPublished - 2000
MoE publication typeA1 Journal article-refereed

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copper alloys
Copper alloys
toughness
fracture strength
Fracture toughness
bend tests
damage
triaxial stresses
Nucleation
voids
nucleation
Crack initiation
Temperature
Surface morphology
crack initiation
Grain boundaries
rice
Cracks
temperature
cracks

Keywords

  • ProperTune

Cite this

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abstract = "Crack nucleation and growth behaviour are important parameters in deciding about the applicability of the dispersion strengthened copper alloy CuAl25 in components such as the first wall and divertor in ITER. The effective strain to fracture of notched tensile specimens decreased with increasing stress state triaxiality and with increasing temperature at constant constraint level following the Rice and Tracey model for void growth. In three point bend tests, the strain for stable crack initiation decreased significantly with increasing temperature. The CuAl25 alloy failed by a ductile microvoid mechanism where extensive void nucleation occurred at very low strains at grain boundaries with increasing stress state triaxiality. At elevated temperatures the fracture surface morphology changed from microvoid to intergranular fracture in three-point bend tests.",
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Damage mechanisms and fracture toughness of GlidCop® CuAl25 IG0 copper alloy. / Tähtinen, Seppo (Corresponding Author); Laukkanen, Anssi; Singh, Bachu.

In: Journal of Nuclear Materials, Vol. 283-287, No. Part 2, 2000, p. 1028 - 1032.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Damage mechanisms and fracture toughness of GlidCop® CuAl25 IG0 copper alloy

AU - Tähtinen, Seppo

AU - Laukkanen, Anssi

AU - Singh, Bachu

PY - 2000

Y1 - 2000

N2 - Crack nucleation and growth behaviour are important parameters in deciding about the applicability of the dispersion strengthened copper alloy CuAl25 in components such as the first wall and divertor in ITER. The effective strain to fracture of notched tensile specimens decreased with increasing stress state triaxiality and with increasing temperature at constant constraint level following the Rice and Tracey model for void growth. In three point bend tests, the strain for stable crack initiation decreased significantly with increasing temperature. The CuAl25 alloy failed by a ductile microvoid mechanism where extensive void nucleation occurred at very low strains at grain boundaries with increasing stress state triaxiality. At elevated temperatures the fracture surface morphology changed from microvoid to intergranular fracture in three-point bend tests.

AB - Crack nucleation and growth behaviour are important parameters in deciding about the applicability of the dispersion strengthened copper alloy CuAl25 in components such as the first wall and divertor in ITER. The effective strain to fracture of notched tensile specimens decreased with increasing stress state triaxiality and with increasing temperature at constant constraint level following the Rice and Tracey model for void growth. In three point bend tests, the strain for stable crack initiation decreased significantly with increasing temperature. The CuAl25 alloy failed by a ductile microvoid mechanism where extensive void nucleation occurred at very low strains at grain boundaries with increasing stress state triaxiality. At elevated temperatures the fracture surface morphology changed from microvoid to intergranular fracture in three-point bend tests.

KW - ProperTune

U2 - 10.1016/S0022-3115(00)00201-4

DO - 10.1016/S0022-3115(00)00201-4

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VL - 283-287

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EP - 1032

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - Part 2

ER -