Interface Effects on the Fracture Mechanism of a High-Toughness Aluminum-Composite Laminate

Cepeda-Jiménez, C.M.; Pozuelo, M.; García-Infanta, J.M.; Ruano, Oscar Antonio; Carreño, Fernando

doi:10.1007/s11661-008-9679-y

Cited by 42 publications

(42 citation statements)

References 30 publications

(27 reference statements)

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“…Additionally, the curve corresponding to the ADH19-T6 laminate shows several small peaks in the plateaus (4) (in Figure 7) without large load drops, which may be associated with microdelamination in the next interface before the crack reaches it. This fracture mechanism, ''interface predelamination,'' [18] is not observed for the ALH19-T6 laminate, indicating higher interface toughness in this laminate. Figure 8 shows SEM micrographs at different magnifications of the crack propagation sequence in the ALH19-T6 (Figure 8(a)) and ADH19-T6 (Figures 8(b) and (c)) laminates during the bend test.…”

Section: E Three-point Bend Testsmentioning

confidence: 84%

Influence of Constituent Materials on the Impact Toughness and Fracture Mechanisms of Hot-Roll-Bonded Aluminum Multilayer Laminates

Cepeda-Jiménez¹,

Hidalgo²,

Pozuelo

et al. 2009

Metall Mater Trans A

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Two aluminum multilayer laminates have been processed by hot roll bonding following similar processing paths. The first one is constituted by alternated Al 2024 and Al 1050 layers (ALH19) and the second one by alternated Al 7075 and Al 1050 layers (ADH19). The influence of the constituent materials in the multilayer laminates both during the processing at high temperature and during the subsequent mechanical characterization has been analyzed. The mechanical behavior of the as-received materials at the processing conditions has been characterized by hot torsion. Multilayer laminates have been tested at room temperature under impact Charpy tests, three-point bend tests, and shear tests on the interfaces. The relative toughness increase compared to the constituent materials was much higher for the ADH19 laminate based on the highstrength Al 7075 alloy than for the ALH19 laminate. This is attributed to the different fracture mechanism.

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Section: E Three-point Bend Testsmentioning

confidence: 84%

Influence of Constituent Materials on the Impact Toughness and Fracture Mechanisms of Hot-Roll-Bonded Aluminum Multilayer Laminates

Cepeda-Jiménez¹,

Hidalgo²,

Pozuelo

et al. 2009

Metall Mater Trans A

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“…In particular, the observed strengthening of the as-cast sample is probably due to the presence of very fine precipitates along the grain boundaries which may act as strong pinning points and thus prevent grain growth or boundary sliding. By contrast, the HPT-induced dissolution of the nanoprecipitates that were initially present in the T6 peak-aged specimen favors the activation of GBS [17,26] and this produces a higher ductility and lower flow stress that may be useful for forming processes. It was reported earlier that the occurrence of GBS in an ultrafine grained Al-Zn alloys after HPT processing is favored by the presence of a solute-rich layer along the GBs [42,43].…”

Section: Discussionmentioning

confidence: 97%

“…During casting, the alloy was mechanical stirred for 2 min at 780ºC using an impeller and then it was ultrasonicated (17.5kHz, 35 Pm amplitude) at 720 ºC for 10 min and cast at 710 ºC in a metallic mold. It is important to note that this alloy does not contain elements such as zirconium or scandium which are commonly added to produce nanoscale dispersoids acting as effective pinning agents to hinder the migration of grain boundaries at high temperatures [25,26].…”

Section: Methodsmentioning

confidence: 99%

Controlling the high temperature mechanical behavior of Al alloys by precipitation and severe straining

Cepeda-Jiménez

Castillo-Rodríguez

Molina-Aldareguia

et al. 2017

Materials Science and Engineering: A

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The aim of this work was to investigate the influence of the precipitate distribution on the microstructure and on the room and high temperature mechanical properties of an age-hardenable aluminium AA6082 alloy following severe straining by high-pressure torsion (HPT). With this goal, specimens in the as-cast and T6 peak-aged conditions were processed by HPT using 0.5, 1 and 5 turns at room temperature. At high strain levels (J>100), similar saturation grain sizes (~250 nm), high-angle boundary fractions (~80%) and hardness values (Hv~160) were obtained for both initial conditions. Grain refinement led to significant strengthening and to good ductility values at room temperature. Analysis by TEM and EDS elemental mapping revealed that HPT processing of the as-cast condition led to fracture of the stable E-phase into many small precipitates located preferentially along grain boundaries and triple junctions. By contrast, HPT processing of the T6 peak-aged specimens revealed a partial dissolution of the needle-shaped nanoprecipitates. The different evolutions of the precipitate distributions following straining in the as-cast and peak-aged conditions gave rise to dramatic differences in the mechanical properties and the operative deformation mechanisms at warm temperatures. These results provide evidence that the high temperature mechanical behavior of age-hardenable Al alloys may be conveniently controlled by altering the precipitate distribution followed by severe straining.

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“…El ensayo se realizó en una máquina universal de ensayos Servosis, a una velocidad del travesaño de 0,005 mm/s, y se utilizaron probetas con unas dimensiones aproximadas de 10×10×3 mm 3 . El ensayo se realiza situando la probeta entre dos soportes metálicos ( Fig.…”

Section: Ensayo De Cizalla En Las Intercarasunclassified

“…Mediante el procesado de materiales laminados multicapa se pueden mejorar, simultáneamente, ambas propiedades mecánicas, que resultan muy superiores a las de sus materiales constituyentes de forma individual [1][2][3][4] .…”

Section: Introductionunclassified

Influencia del tratamiento térmico en las intercaras y propiedades mecánicas de un laminado multicapa de aluminio

Cepeda-Jiménez¹,

Hidalgo²,

Pozuelo

et al. 2010

REVMETAL

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ResumenEn este trabajo se han caracterizado la microestructura y las propiedades mecánicas alrededor de la intercara de un material multicapa de aluminio basado en las aleaciones Al 7075 y Al 2024. Las técnicas empleadas, principalmente, han sido EBSD y ensayos de cizalla para determinar propiedades mecánicas de las intercaras, en función del tiempo de solubilización durante el tratamiento térmico T6. Dicho tratamiento modifica la microestructura de las aleaciones constituyentes adyacentes a la intercara y, por tanto, las propiedades mecánicas de esta. La combinación de la ruta de procesado adecuada mediante laminación en caliente, junto con un tratamiento térmico optimizado conduce a intercaras resistentes, propensas a delaminar y, por ello, a materiales con propiedades mecánicas excelentes. Palabras claveAleaciones de aluminio; Procesado termomecánico; Propiedades mecánicas; Intercaras; Microestructura. Influence of the thermal treatment on the interfaces and mechanical properties of an aluminium multilayer laminate AbstractThe microstructure and mechanical properties in the interface region of a multilayer laminate based on high strength aluminium alloys, Al 7075 and Al 2024, have been characterized mainly by EBSD and shear tests. It is shown that the time of solution treatment during T6 thermal treatment modifies the microstructure of the constituent alloys adjacent to the interface and, as a consequence, the interfacial mechanical properties. The combination of the correct rolling processing with optimized thermal treatment leads to strong interfaces prone to delaminate, and thus, materials with outstanding mechanical properties.

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Interface Effects on the Fracture Mechanism of a High-Toughness Aluminum-Composite Laminate

Cited by 42 publications

References 30 publications

Influence of Constituent Materials on the Impact Toughness and Fracture Mechanisms of Hot-Roll-Bonded Aluminum Multilayer Laminates

Influence of Constituent Materials on the Impact Toughness and Fracture Mechanisms of Hot-Roll-Bonded Aluminum Multilayer Laminates

Controlling the high temperature mechanical behavior of Al alloys by precipitation and severe straining

Influencia del tratamiento térmico en las intercaras y propiedades mecánicas de un laminado multicapa de aluminio

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