Fatigue behaviour of aluminium matrix composites reinforced with continuous alumina fibres

Jacquesson, M.; Vidal-Sétif, M.H.; Valle, R.; Godin, Nathalie; Girard, A.; Fougères, R.

doi:10.1179/026708300101508513

Cited by 4 publications

(6 citation statements)

References 3 publications

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“…On the contrary, using a quasi-UD woven fabric preform with 90 pct fibers in the longitudinal direction and 10 pct fibers in the transverse direction prevents fiber movements during metal infiltration, improves the transverse mechanical properties, and nearly maintains the longitudinal performances. [9,10] A detailed investigation of the thermomechanical behavior and properties of these quasi-UD composites is reported in the preceding article (Part I, [11] ). However, completely reinforced mechanical parts designed for aerospace applications necessitate a more isotropic behavior.…”

Section: Introductionmentioning

confidence: 99%

Tensile and fatigue behavior of Al-based metal matrix composites reinforced with continuous carbon or alumina fibers: Part II. Quasi-unidirectional composite cross-ply laminates

Valle,

Vidal-Sétif,

Schuster

et al. 2004

Metall Mater Trans A

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The mechanical behavior (tension, fatigue, and notch sensitivity) of Al-based metal matrix composite (MMC) cross-ply laminates is investigated. The two selected laminates, K139/A357 and N610/AU2, are reinforced by continuous K139 (carbon) or N610 (alumina) fibers. These multiplies consist in the stacking of (quasi-unidirectional) quasi-UD preforms oriented at 0, Ϯ45, and 90 deg, the thermomechanical behavior of the corresponding quasi-UD composites being reported independently (Part I). The investigated cross-ply laminates exhibit attractive static and cyclic performances and a low notch (circular hole) sensitivity. High-resolution microfractography has led to a better understanding of the fracture mechanisms of these materials. In this respect, the role of the transverse bundles is dominant in the tensile and fatigue failure of both laminates. However, the failure surfaces are completely different: long fiber pullout in the K139/A357 laminate and much more planar areas in the N610/AU2 laminate. Due to the rather low notch sensitivity, a large portion of the specimen section was already highly damaged during a nonnegligible part of the fatigue life: debonded interfaces in the K139/A357 laminate and multicracked and "crumbled" matrix in the N610/AU2 laminate. These mechanisms are in good agreement with the weak interface in the first case and the very low yield stress of the AU2 matrix, much lower than the fatigue limit of the N610/AU2 laminate, in the second case. Moreover, compared to the quasi-UD composites, the stress concentration around the notch allows further exacerbation of the fatigue mechanisms, much more intense than that attained in "model" composites.

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Section: Introductionmentioning

confidence: 99%

Tensile and fatigue behavior of Al-based metal matrix composites reinforced with continuous carbon or alumina fibers: Part II. Quasi-unidirectional composite cross-ply laminates

Valle,

Vidal-Sétif,

Schuster

et al. 2004

Metall Mater Trans A

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“…[2] In this context, knowledge of the specific behavior and of the damage mechanisms of the quasi-UD composites is a prerequisite to the further investigation of the mechanical properties of the quasi-UD (0, Ϯ45, 90 deg) laminates. Although the study of the mechanical properties and damage mechanisms of the quasi-UD composites represents a broader investigation involving acoustic emission monitoring, [10,11] only those of the results that are essential in the understanding of the specific behavior of this type of composite are reported in the present article (Part I). The next article (Part II [12] ) will be devoted to the quasi-UD (0, Ϯ45, 90 deg) laminates.…”

Section: Introductionmentioning

confidence: 99%

“…Quasiunidirectional (quasi-UD) composites reinforced by a woven fabric preform with 90 pct fibers in the longitudinal direction and 10 pct fibers in the transverse direction constitute an efficient alternative to the UD composites, since the quasi-UD preform prevents fiber movements during infiltration and improves the transverse mechanical properties, whereas it nearly maintains the longitudinal performances. [10,11] Completely reinforced mechanical parts, which generally necessitate a less anisotropic behavior, may be manufactured from cross-ply laminates consisting in the stacking of such quasi-UD preforms oriented at 0, Ϯ45, 90 deg. [2] In this context, knowledge of the specific behavior and of the damage mechanisms of the quasi-UD composites is a prerequisite to the further investigation of the mechanical properties of the quasi-UD (0, Ϯ45, 90 deg) laminates.…”

Section: Introductionmentioning

confidence: 99%

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Tensile and fatigue behavior of Al-based metal matrix composites reinforced with continuous carbon or alumina fibers: Part I. Quasi-unidirectional composites

Jacquesson

Girard

Vidal-Sétif

et al. 2004

Metall Mater Trans A

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The thermomechanical (dilatometric, tensile, and fatigue) behavior of Al-based metal matrix composites (MMCs) is investigated. These composites are reinforced by quasi-unidirectional (quasi-UD) woven fabric preforms with 90 pct of continuous fibers in the longitudinal direction and 10 pct in the transverse direction. The two composite systems investigated feature a highly ductile matrix (AU2: Al-2Cu wt pct) with a strongly bonded fiber-matrix interface (N610 alumina fibers) and an alloyed, high-strength matrix (A357: Al-7Si-0.6Mg wt pct) with a weak fiber-matrix interface (K139 carbon fibers). Microstructural investigation of the tested specimens has permitted identification of the specific characteristics of these composites: undulation of the longitudinal bundles, presence of the straight transverse bundles, interply shearing, and role of brittle phases. Moreover, simple semiquantitative models (e.g., interply shearing) have enabled explanation of the specific mechanical behavior of these quasi-UD composites, which exhibit high tensile and fatigue strengths, as compared with the corresponding pure UD composites. Knowledge of the specific characteristics and mechanical behavior of these quasi-UD composites will facilitate the further investigation of the (0, Ϯ45, 90 deg) quasi-UD laminates (Part II). At a more theoretical viewpoint, the specific geometry and behavior of these quasi-UD composites allows exacerbation of fatigue mechanisms, even more intense than in "model" composites.

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“…TM alumina fibre reinforced aluminium composites [14,15] have, from this standpoint, only received limited attention [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Damage accumulation during cyclic loading of a continuous alumina fibre reinforced aluminium composite

2005

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Fatigue behaviour of aluminium matrix composites reinforced with continuous alumina fibres

Cited by 4 publications

References 3 publications

Tensile and fatigue behavior of Al-based metal matrix composites reinforced with continuous carbon or alumina fibers: Part II. Quasi-unidirectional composite cross-ply laminates

Tensile and fatigue behavior of Al-based metal matrix composites reinforced with continuous carbon or alumina fibers: Part II. Quasi-unidirectional composite cross-ply laminates

Tensile and fatigue behavior of Al-based metal matrix composites reinforced with continuous carbon or alumina fibers: Part I. Quasi-unidirectional composites

Damage accumulation during cyclic loading of a continuous alumina fibre reinforced aluminium composite

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