Étude du rôle de la microstructure sur la résistance à la fissuration par fatigue des alliages TiAI à l'aide de la technique de corrélation d'images numériques de mouchetis

Fabienne Lagattu; Anne Lise Gloanec; Gilbert Hénaff; Jean Brillaud

doi:10.1051/meca:2005062

Étude du rôle de la microstructure sur la résistance à la fissuration par fatigue des alliages TiAI à l'aide de la technique de corrélation d'images numériques de mouchetis

Translated title of the contribution: Influence of microstructure on fatieue crack growth resistance in TiAl alloys by using white light image correlation method

Fabienne Lagattu, Anne Lise Gloanec, Gilbert Hénaff, Jean Brillaud

Centre national de la recherche scientifique

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

Abstract

This study deals with fatigue crack propagation in a TiAl alloy, manufactured by casting and powder metallurgy (PM). The cast alloy presents a lamellar microstructure, whereas the PM alloy exhibits an equiaxed γ microstructure. In order to get insight into crack propagation mechanisms in these two microstructures, full-field in-plane strains were measured near the crack tip during fatigue tests. An optical method based on digital image correlation has been used. The results show that the lamellar microstructure presents an enhanced capacity to accommodate overstrains at the crack tip, which explains its higher fatigue crack propagation resistance.

Translated title of the contribution	Influence of microstructure on fatieue crack growth resistance in TiAl alloys by using white light image correlation method
Original language	French
Pages (from-to)	499-507
Number of pages	9
Journal	Mecanique et Industries
Volume	6
Issue number	5
DOIs	https://doi.org/10.1051/meca:2005062
Publication status	Published - 1 Sept 2005

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10.1051/meca:2005062

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title = "{\'E}tude du r{\^o}le de la microstructure sur la r{\'e}sistance {\`a} la fissuration par fatigue des alliages TiAI {\`a} l'aide de la technique de corr{\'e}lation d'images num{\'e}riques de mouchetis",

abstract = "This study deals with fatigue crack propagation in a TiAl alloy, manufactured by casting and powder metallurgy (PM). The cast alloy presents a lamellar microstructure, whereas the PM alloy exhibits an equiaxed γ microstructure. In order to get insight into crack propagation mechanisms in these two microstructures, full-field in-plane strains were measured near the crack tip during fatigue tests. An optical method based on digital image correlation has been used. The results show that the lamellar microstructure presents an enhanced capacity to accommodate overstrains at the crack tip, which explains its higher fatigue crack propagation resistance.",

keywords = "Correlation, Crack propagation, Fatigue, Strain, TiAl alloys",

author = "Fabienne Lagattu and Gloanec, \{Anne Lise\} and Gilbert H{\'e}naff and Jean Brillaud",

year = "2005",

month = sep,

day = "1",

doi = "10.1051/meca:2005062",

language = "Fran{\c c}ais",

volume = "6",

pages = "499--507",

journal = "Mecanique et Industries",

issn = "1296-2139",

number = "5",

}

Étude du rôle de la microstructure sur la résistance à la fissuration par fatigue des alliages TiAI à l'aide de la technique de corrélation d'images numériques de mouchetis. / Lagattu, Fabienne; Gloanec, Anne Lise; Hénaff, Gilbert et al.
In: Mecanique et Industries, Vol. 6, No. 5, 01.09.2005, p. 499-507.

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

TY - JOUR

T1 - Étude du rôle de la microstructure sur la résistance à la fissuration par fatigue des alliages TiAI à l'aide de la technique de corrélation d'images numériques de mouchetis

AU - Lagattu, Fabienne

AU - Gloanec, Anne Lise

AU - Hénaff, Gilbert

AU - Brillaud, Jean

PY - 2005/9/1

Y1 - 2005/9/1

N2 - This study deals with fatigue crack propagation in a TiAl alloy, manufactured by casting and powder metallurgy (PM). The cast alloy presents a lamellar microstructure, whereas the PM alloy exhibits an equiaxed γ microstructure. In order to get insight into crack propagation mechanisms in these two microstructures, full-field in-plane strains were measured near the crack tip during fatigue tests. An optical method based on digital image correlation has been used. The results show that the lamellar microstructure presents an enhanced capacity to accommodate overstrains at the crack tip, which explains its higher fatigue crack propagation resistance.

AB - This study deals with fatigue crack propagation in a TiAl alloy, manufactured by casting and powder metallurgy (PM). The cast alloy presents a lamellar microstructure, whereas the PM alloy exhibits an equiaxed γ microstructure. In order to get insight into crack propagation mechanisms in these two microstructures, full-field in-plane strains were measured near the crack tip during fatigue tests. An optical method based on digital image correlation has been used. The results show that the lamellar microstructure presents an enhanced capacity to accommodate overstrains at the crack tip, which explains its higher fatigue crack propagation resistance.

KW - Correlation

KW - Crack propagation

KW - Fatigue

KW - Strain

KW - TiAl alloys

U2 - 10.1051/meca:2005062

DO - 10.1051/meca:2005062

M3 - Article

AN - SCOPUS:27944503480

SN - 1296-2139

VL - 6

SP - 499

EP - 507

JO - Mecanique et Industries

JF - Mecanique et Industries

IS - 5

ER -

Étude du rôle de la microstructure sur la résistance à la fissuration par fatigue des alliages TiAI à l'aide de la technique de corrélation d'images numériques de mouchetis

Abstract

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