The influence of solid-state and liquid-phase bonding on fatigue at Al/Al2O3 interfaces

Gaudette, F.; Suresh, S.; Evans, A.G.

doi:10.1007/s11661-999-1007-7

Cited by 15 publications

(9 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[8,19]. While the kinematics of crack growth along an interface by a duplex sliptype mechanism is unclear, fatigue striations on the fracture surface and discrete slip traces on the metal surface in the wake of the propagating crack are also seen in cyclic crack growth at interfaces [20][21][22]. In order to compare the predictions of the discrete dislocation simulations with these experimental observations, the deformation pattern predicted by the discrete dislocation calculation is illustrated by plotting slip contours.…”

Section: Fatigue At An Interfacementioning

confidence: 99%

“…In particular, Neumann's model is based on a mechanism that accounts for crack growth as well as striations by an alternating duplex slip mechanism. It is worth noting that striation formation is observed in fatigue crack growth at metalceramic interfaces [20][21][22] even though the kinematics of crack growth by an alternating slip mechanism is not clear for a crack growing along such an interface.…”

Section: Introductionmentioning

confidence: 99%

“…Considering a metal-ceramic interface has several advantages over the homogeneous material case: (i) crack growth along interfaces occurs when the interfacial cohesive strength is lower than that of the surrounding homogeneous materials; with decreasing cohesive strength the plastic zone size decreases, which reduces the computational time and decreasing cohesive strength increases the effective cohesive length, which improves numerical accuracy for a given mesh resolution [25]; (ii) along a bimaterial interface, crack growth often occurs along the interface so that our assumption of straight-ahead crack growth is appropriate; and (iii) even though straight-ahead crack growth occurs, the mismatch in material properties allows mixed-mode loading effects to be explored. In addition, fatigue crack growth along metal-ceramic interfaces is of interest in its own right, see [20][21][22]26]. …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Discrete dislocation modeling of fatigue crack propagation

Deshpande

Needleman

Giessen³

2002

Acta Materialia

128

100

View full text Add to dashboard Cite

Discrete dislocation modeling of fatigue crack propagation Deshpande, V.S.; Needleman, A.; van der Giessen, E.Published in: Acta Materialia DOI: 10.1016/S1359-6454(01)00377-9IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite from it. Please check the document version below. Document VersionPublisher's PDF, also known as Version of record Publication date: 2002Link to publication in University of Groningen/UMCG research database Citation for published version (APA): Deshpande, V. S., Needleman, A., & van der Giessen, E. (2002). Discrete dislocation modeling of fatigue crack propagation. Acta Materialia, 50(4), 831-846. [PII S1359-6454(01)00377-9]. https://doi.org/10.1016/S1359-6454(01)00377-9 Copyright Other than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons).Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. AbstractAnalyses of the growth of a plane strain crack subject to remote mode I cyclic loading under small-scale yielding are carried out using discrete dislocation dynamics. Cracks along a metal-rigid substrate interface and in a single crystal are studied. The formulation is the same as that used to analyze crack growth under monotonic loading conditions, differing only in the remote stress intensity factor being a cyclic function of time. Plastic deformation is modeled through the motion of edge dislocations in an elastic solid with the lattice resistance to dislocation motion, dislocation nucleation, dislocation interaction with obstacles and dislocation annihilation being incorporated through a set of constitutive rules. An irreversible relation is specified between the opening traction and the displacement jump across a cohesive surface ahead of the initial crack tip in order to simulate cyclic loading in an oxidizing environment. The cyclic crack growth rate log(da/dN) versus applied stress intensity factor range log(⌬K I ) curve that emerges naturally from the solution of the boundary value problem shows distinct threshold and Paris law regimes. Paris law exponents in the range 4 to 8 are obtained for the parameters employed here. Furthermore, rather uniformly spaced slip bands corresponding to surface striations develop in the wakes of the propagating cracks. 

show abstract

Section: Fatigue At An Interfacementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Discrete dislocation modeling of fatigue crack propagation

Deshpande

Needleman

Giessen³

2002

Acta Materialia

128

100

View full text Add to dashboard Cite

show abstract

“…While much research has been conducted to understand the strength and fast fracture behavior of metal/ceramic interfaces , previous work is limited to a handful of studies looking at subcritical crack growth at interfaces, namely, fatigue crack growth under cyclic loading [32][33][34][35][36] and moisture assisted slow crack growth under static loading [19,[37][38][39]. An understanding of subcritical crack growth is important, however, since these properties will most likely play an important role in dictating the lifetime and reliability of metal/ceramic interface containing systems; indeed, both fatigue crack growth under cyclic loading and moisture assisted slow crack growth under static loading allow for crack propagation to occur slowly, leading to time dependant failure.…”

Section: Introductionmentioning

confidence: 99%

Interfacial and near interfacial crack growth phenomena in metal bonded alumina

Kruzic

2001

View full text Add to dashboard Cite

This study examines the mechanisms of interfacial and near interfacial crack propagation associated with the failure of sandwich specimens consisting of 99.5% pure polycrystalline alumina: 1) liquid state bonded with 99.999% pure aluminum layers and 2) partial transient liquid phase (PTLP) bonded using copper/niobium/copper interlayers.For the former system, the aluminum layer thickness was varied from 5 to 100 µm; it was found that the 3-point unnotched bending strength of the aluminum bonded joints increased, and the fracture toughness decreased, with decreasing layer thickness.Strength beams failed by ductile failure in the aluminum while fracture toughness samples failed by brittle fracture in the alumina. Under cyclic loading, crack growth occurred primarily by separating the aluminum from the alumina with evidence of ductile fatigue striations; cracks deviated into the alumina only for thin layered samples at high driving forces. Cyclic fatigue thresholds increased with decreasing layer thickness; however, the change to a brittle fatigue mechanism for thin layered samples at high driving forces was detrimental to the overall fatigue resistance. Under static loading in 2 moist air, interfacial separation was never observed at measurable rates (≥ 10 -9 m/sec); however, for 5 and 35 µm thick layered samples, cracks deviated off the interface and grew, sometimes stably, into the alumina resulting in time dependent failure.For alumina PTLP bonded with copper/niobium/copper interlayers, the mean interfacial fracture toughness was found to decrease from 39 J/m 2 to 21 J/m 2 as temperature was increased from 25 to 1000°C. At room temperature, cyclic fatigue crack propagation occurred at both the niobium/alumina interface and in the alumina, with higher fatigue thresholds resulting from a predominantly near interfacial (alumina) crack path. During both fracture and fatigue failure, residual copper at the interface deformed and remained adhered to both sides of the fracture surface, while separation of the niobium/alumina interface appeared essentially brittle in both cases. The observed behaviors of all samples are examined in terms of modulus mismatch effects, the level of plastic constraint, the relative crack propagation resistance of each observed crack path, the loading conditions, extrinsic toughening from ductile phase and/or alumina grain bridging, and environmental influences.i

show abstract

“…In order to design reliable engineering systems using such bimaterial interfaces, the structural integrity of the interface must be maintained over the lifetime of the component. While much research has been conducted on the strength and fast fracture behavior of oxide/metal interfaces [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15], previous work is limited to only a handful of studies that focused on time dependent crack growth at and near interfaces, specifically, fatigue crack growth under cyclic loading [16][17][18][19] and moisture-assisted crack growth under static loading [20][21][22][23]. Additionally, layered material systems are quite common, and in metal layers, plastic deformation is often constrained by the oxide when plasticity extends across the entire layer during failure.…”

Section: Introductionmentioning

confidence: 99%

Time Dependent Debonding of Aluminum/Alumina Interfaces under Cyclic and Static Loading

et al. 2000

View full text Add to dashboard Cite

The structural integrity of oxide/metal interfaces is important in many applications. While most attention has focused on the debonding of oxide/metal interfaces by conducting strength and fracture toughness tests, very few investigations have looked at time dependant failure of interfaces under cyclic or static loading. Tests have been conducted on sandwich specimens consisting of 5 -100 micron thick aluminum layers bonded between either polycrystalline or single crystal Al 2 O 3 to determine cyclic fatigue-crack growth, as well as static loaded moistureassisted crack-growth, properties of Al/Al 2 O 3 interfaces. Under cyclic loading, crack growth was observed to occur predominantly by interfacial debonding, but was also observed to make excursions into the Al 2 O 3 . Static loading in a moist environment also caused interfacial cracks to deviate into the Al 2 O 3 or alternatively to arrest. Due to the poor crack growth resistance of the Al 2 O 3 , cracks leaving the interface grew at faster rates than those at the interface. Trends in crack trajectories and crack growth rates are explained in terms of the degree of plastic constraint in the aluminum layer, the modulus mismatch, and the effects of environmental mechanisms.

show abstract

The influence of solid-state and liquid-phase bonding on fatigue at Al/Al2O3 interfaces

Cited by 15 publications

References 29 publications

Discrete dislocation modeling of fatigue crack propagation

Discrete dislocation modeling of fatigue crack propagation

Interfacial and near interfacial crack growth phenomena in metal bonded alumina

Time Dependent Debonding of Aluminum/Alumina Interfaces under Cyclic and Static Loading

Contact Info

Product

Resources

About