Accelerated grain refinement during accumulative roll bonding by nanoparticle reinforcement

Schmidt, Christian W.; Knieke, Catharina; Maier, Verena; Höppel, Heinz Werner; Peukert, Wolfgang

doi:10.1016/j.scriptamat.2010.10.013

Cited by 92 publications

(65 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In recent years, it has also been shown that the ARB process can be successfully used to produce multi-component materials with tailored properties. Schmidt et al [4] inserted Al 2 O 3 nanoparticles within the ARB process, leading to an accelerated grain refinement accompanied by a further strengthening. Furthermore, different materials can easily be combined to produce laminated structures, which are denoted as laminated metal composites (LMCs) according to Lesuer et al [5].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Accumulative Roll-Bonded AA1050A/AA5005 Laminated Metal Composites

Kümmel

Kreuz

Hausöl

et al. 2016

Metals

Self Cite

View full text Add to dashboard Cite

Laminated metal composites (LMCs) with alternating layers of commercial pure aluminum AA1050A and aluminum alloy AA5005 were produced by accumulative roll-bonding (ARB). In order to vary the layer thickness and the number of layer interfaces, different numbers of ARB cycles (4, 8, 10, 12, 14 and 16) were performed. The microstructure and mechanical properties were characterized in detail. Up to 8 ARB cycles, the ultrafine-grained (UFG) microstructure of the layers in the LMC evolves almost equally to those in AA1050A and AA5005 mono-material sheets. However, the grain size in the composites tends to have smaller values. Nevertheless, the local mechanical properties of the individual layers in the LMCs are very similar to those of the mono-material sheets, and the macroscopic static mechanical properties of the LMCs can be calculated as the mean value of the mono-material sheets applying a linear rule of mixture. In contrast, for more than 12 ARB cycles, a homogenous microstructure was obtained where the individual layers within the composite cannot be visually separated any longer; thus, the hardness is at one constant and a high level across the whole sheet thickness. This results also in a significant higher strength in tensile testing. It was revealed that, with decreasing layer thickness, the layer interfaces become more and more dominating.

show abstract

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Accumulative Roll-Bonded AA1050A/AA5005 Laminated Metal Composites

Kümmel

Kreuz

Hausöl

et al. 2016

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

“…When copper particles are applied during the ARB process, the strength can be further improved by approximately 25 MPa. This can be understood by additional plastic deformation around the particles, which are harder than the matrix, and therewith locally enhanced grain refinement [6,14]. Among the volume fractions of copper particles applied here from 0.3% to 2.9%, the difference in strength is only about 5 MPa.…”

Section: Aluminum Reinforced With Coppermentioning

confidence: 88%

“…During each of six accumulative roll bonding cycles, a constant volume of particles was applied to the respective sheet surfaces by air gun spraying from aqueous suspension as described in [6], so that a volume fraction of between 0.3% and 2.9% was achieved with copper particles in aluminum base material and volume fractions between 3.0% and 3.9% were achieved with aluminum particles in copper base material. Before roll bonding, the materials were heated to 125 °C for 300 s in order to evaporate the water from the particle suspension.…”

Section: Materials Processingmentioning

confidence: 99%

“…Before roll bonding, the materials were heated to 125 °C for 300 s in order to evaporate the water from the particle suspension. As this method of inserting the same amount of particles in consecutive ARB cycles leads to a heterogeneous distribution of particles over sheet thickness [6], three further ARB cycles were added without particle addition to improve homogeneity of particle distribution in sheet thickness. This state is denoted as PS for particle strengthened (see Figures 1a (aluminum based materials), and 2a,b (copper based materials)).…”

Section: Materials Processingmentioning

confidence: 99%

“…Besides the formation of an ultrafine-grained microstructure, this process offers a OPEN ACCESS high potential for tailoring properties of ultrafine-grained materials [4,5]. In this respect particle reinforcement is of special interest because it allows a high freedom in designing different spatial distributions of reinforcements [6]. It has been demonstrated that strengthening with low volume fractions of ceramic nanoparticles [7], as well as with high volume fractions of larger ceramic particles [8], is possible.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Particle Based Alloying by Accumulative Roll Bonding in the System Al-Cu

Schmidt

Knödler

Höppel

et al. 2011

Metals

Self Cite

View full text Add to dashboard Cite

Abstract:The formation of alloys by particle reinforcement during accumulative roll bonding (ARB), and subsequent annealing, is introduced on the basis of the binary alloy system Al-Cu, where strength and electrical conductivity are examined in different microstructural states. An ultimate tensile strength (UTS) of 430 MPa for Al with 1.4 vol.% Cu was reached after three ARB cycles, which almost equals UTS of the commercially available Al-Cu alloy AA2017A with a similar copper content. Regarding electrical conductivity, the UFG structure had no significant influence. Alloying of aluminum with copper leads to a linear decrease in conductivity of 0.78 µΩ·cm/at.% following the Nordheim rule. On the copper-rich side, alloying with aluminum leads to a slight strengthening, but drastically reduces conductivity. A linear decrease of electrical conductivity of 1.19 µΩ·cm/at.% was obtained.

show abstract

Design of Graded Materials by Particle Reinforcement During Accumulative Roll Bonding

et al. 2012

Self Cite

View full text Add to dashboard Cite

Graded distributions of copper particles in ultrafine-grained aluminium sheets are produced by accumulative roll bonding and particle reinforcement. The metallic copper particles are sprayed on the sheet surfaces under variation of spray distance and/or relative velocity of the spray gun to the sheet. Therewith, the particle content could be varied by a factor of three. After solutionizing, the successful gradation is clearly proven by tensile tests showing a steady and monotonous gradient along the rolling direction. By a systematic analysis of the spraying process, the particle content profile is calculated. Accuracy of the calculation is confirmed by electrical resistivity measurements. The presented method enables the production of tailored sheets by graded particle reinforcement. The graded sheets are also used for basic investigation of materials properties along graded compositions. Fig. 4. (a) Stress-strain data of aluminium alloyed with copper based on graded particle reinforcement by acceleration. (b) Photograph of graded sheet with positions of tensile specimens. (c) Calculated copper content profile with positions of tensile specimens and respective ultimate tensile strength in the solutionized state.

show abstract

Accelerated grain refinement during accumulative roll bonding by nanoparticle reinforcement

Cited by 92 publications

References 15 publications

Microstructure and Mechanical Properties of Accumulative Roll-Bonded AA1050A/AA5005 Laminated Metal Composites

Microstructure and Mechanical Properties of Accumulative Roll-Bonded AA1050A/AA5005 Laminated Metal Composites

Particle Based Alloying by Accumulative Roll Bonding in the System Al-Cu

Design of Graded Materials by Particle Reinforcement During Accumulative Roll Bonding

Contact Info

Product

Resources

About