Microstructure and fatigue properties of the ultrafine-grained AM60 magnesium alloy processed by equal-channel angular pressing

Kulyasova, Olya B.; Исламгалиев, Р. К.; Mingler, Bernhard; Zehetbauer, M.

doi:10.1016/j.msea.2008.03.057

Cited by 78 publications

(46 citation statements)

References 10 publications

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“…Alloying element atoms and dispersed particles can prevent grain boundary migration, which is one of structure relaxation mechanisms in the process of fatigue tests manifesting itself as grain growth [8] and twinning [9] leading to material softening.…”

Section: Resultsmentioning

confidence: 99%

The Microstructure and Fatigue of Ultrafine-Grained Al-Cu-Mg Alloy

et al. 2015

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Section: Resultsmentioning

confidence: 99%

The Microstructure and Fatigue of Ultrafine-Grained Al-Cu-Mg Alloy

et al. 2015

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“…Some studies dealing with the fatigue test have led to the conclusion that at room temperature the previously SPD processed materials are able to withstand a lower number of fatigue cycles than those which have not been previously processed by ECAP [17] as a consequence of the high amount of dislocation that exists inside the so-processed materials. When the ECAP process is carried out by increasing the processing temperature it is possible to obtain an improvement in the fatigue life in the ultrafine grained materials [18]. In this way, Goto et al [19] analysed the influence of the number of ECAP passages in the fatigue behaviour of a copper alloy after 4, 8, and 12 passages.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Fatigue and Wear Behaviour in Ultrafine Grained Connecting Rods

Luri

Luis

León

et al. 2017

Metals

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Abstract:Over the last few years there has been an increasing interest in the study and development of processes that make it possible to obtain ultra-fine grained materials. Although there exists a large number of published works related to the improvement of the mechanical properties in these materials, there are only a few studies that analyse their in-service behaviour (fatigue and wear). In order to bridge the gap, in this present work, the fatigue and wear results obtained for connecting rods manufactured by using two different aluminium alloys (AA5754 and AA5083) previously deformed by severe plastic deformation (SPD), using Equal Channel Angular Pressing (ECAP), in order to obtain the ultrafine grain size in the processed materials are shown. For both aluminium alloys, two initial states were studied: annealed and ECAPed. The connecting rods were manufactured from the previously processed materials by using isothermal forging. Fatigue and wear experiments were carried out in order to characterize the in-service behaviour of the components. A comparative study of the results was made for both initial states of the materials. Furthermore, Finite Element Modelling (FEM) simulations were used in order to compare experimental results with those obtained from simulations. In addition, dimensional wear coefficients were found for each of the aluminium alloys and initial deformation states. This research work aims to progress the knowledge of the behaviour of components manufactured from ultrafine grain materials.

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“…It is well known that grain refinement in various metals and alloys is accompanied by a significant enhancement in strength and a decrease in ductility [5][6][7][8]. Meanwhile, the structural features and mechanical properties of UFG aluminum alloys essentially depend on the regimes of severe plastic deformation and a material's chemical composition, determining the contributions of solidsolution strengthening and precipitation hardening.…”

Section: Introductionmentioning

confidence: 99%

Strength and fatigue of an ultrafine-grained Al-Cu-Mg alloy

2017

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Abstract. The dependence of strength and fatigue on microstructure of the Al-Cu-Mg alloy has been investigated. Various microstructures of the alloy were produced: the one with a coarse-grained (CG) structure after T6 heat treatment; the one with a homogeneous ultrafine-grained (UFG) structure and the one with a bimodal (mixed) structure, both processed by equal-channel angular pressing (ECAP). The mean grain size and morphology of precipitates were studied by transmission electron microscopy. The ultimate tensile strength and the fatigue endurance limit were determined using the tensile and fatigue tests of standard specimens. It is established that the formation of a homogeneous UFG structure and of a bimodal (mixed) structure alloy contributes to a significant increase in microhardness by 16% and 60%, and an increase of the ultimate tensile strength by 20 and 52%, respectively, as compared to the samples subjected to T6 heat treatment. Fatigue tests show that the alloy with a bimodal (mixed) structure has the highest fatigue endurance limit, 45% higher than in the sample subjected to T6 heat treatment. In contrast, the formation of a homogeneous UFG structure enables increasing the fatigue endurance limit by 15% only.

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Microstructure and fatigue properties of the ultrafine-grained AM60 magnesium alloy processed by equal-channel angular pressing

Cited by 78 publications

References 10 publications

The Microstructure and Fatigue of Ultrafine-Grained Al-Cu-Mg Alloy

The Microstructure and Fatigue of Ultrafine-Grained Al-Cu-Mg Alloy

Analysis of Fatigue and Wear Behaviour in Ultrafine Grained Connecting Rods

Strength and fatigue of an ultrafine-grained Al-Cu-Mg alloy

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