Impact of interfaces on the radiation response and underlying defect recovery mechanisms in nanostructured Cu-Fe-Ag

Wurmshuber, Michael; Frazer, D.; Bachmaier, Andrea; Wang, Yongqiang; Hosemann, Peter; Kiener, Daniel

doi:10.1016/j.matdes.2018.11.007

Cited by 20 publications

(9 citation statements)

References 89 publications

(131 reference statements)

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“…From these bulk materials, porous Cu, Au or CuAg materials were then created by dealloying using selective etching with HCl 85,86) or potentiostatic dealloying. 84) In case of the porous Au material, a porosity of ³50% and ligaments with an average diameter of about 100 nm with on average ³70 nm diameter small grains was achieved. 86) For the porous Cu material, similar porosity levels and a slightly larger ligament size of about 200 nm was obtained.…”

Section: Synthesis Of Porous Materials and Irradiationmentioning

confidence: 99%

“…82,83) Recently, another procedure to obtain UFG and NC porous metallic materials based on HPT powder consolidation and deformation process has been developed. 8486) Different combinations of immiscible powder mixtures (binary Cu/Fe 85) and Au/Fe 86) or ternary CuFe Ag 84) systems) were used as starting material resulting either in mechanically alloyed single phase or dual-phase NC microstructures. The bulk mechanically alloyed materials were then heat treated to reach phase separation or reduce the amount of forced mixing and/or to adjust the grain size of the respective phases.…”

Section: Synthesis Of Porous Materials and Irradiationmentioning

confidence: 99%

“…85) Similar ligament sizes were observed for the CuAg porous material. 84) As an example, the different microstructural states during the fabrication process of a Cu 50 Fe 25 Ag 25 material -initial state, as-deformed state, annealed, dealloyed -leading to a dual-phase nanoporous material is illustrated in Fig. 3.…”

Section: Synthesis Of Porous Materials and Irradiationmentioning

confidence: 99%

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High-Pressure Torsion Deformation Induced Phase Transformations and Formations: New Material Combinations and Advanced Properties

Bachmaier

Pippan

2019

Mater. Trans.

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Heavy plastic shear deformation at relatively low homologous temperatures is called high-pressure torsion (HPT) deformation, which is one method of severe plastic deformation (SPD). The aim of the paper is to give an overview of a new processing approach which permits the generation of innovative metastable materials and novel nanocomposites by HPT deformation. Starting materials can be either coarse-grained multi-phase alloys, a mixture of different elemental powders or any other combination of multiphase solid starting materials. After HPT processing, the achievable microstructures are similar to the ones generated by mechanical alloying. Nevertheless, one advantage of the HPT process is that bulk samples of the different types of metastable materials and nanocomposites are obtained directly during HPT deformation. It will be shown that different material combinations can be selected and materials with tailored properties, or in other words, materials designed for specific applications and the thus required properties, can be synthesized. Areas of application for these new materials range from hydrogen storage to materials resistant to harsh radiation environments.

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Section: Synthesis Of Porous Materials and Irradiationmentioning

confidence: 99%

Section: Synthesis Of Porous Materials and Irradiationmentioning

confidence: 99%

Section: Synthesis Of Porous Materials and Irradiationmentioning

confidence: 99%

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High-Pressure Torsion Deformation Induced Phase Transformations and Formations: New Material Combinations and Advanced Properties

Bachmaier

Pippan

2019

Mater. Trans.

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“…Increasing the cold deformation strain refines the microstructure, including the size of the second phase particles. The phase interfaces gradually become the main hindrance of dislocation motion [26][27][28][29]. The increased tensile strength is related to the filament spacing by the Hall-Petch equation [30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Strengthening Model of Cu–Fe In-Situ Composites

Liu

Sheng

et al. 2020

Materials

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The tensile strength evolution and strengthening mechanism of Cu–Fe in-situ composites were investigated using both experiments and theoretical analysis. Experimentally, the tensile strength evolution of the in-situ composites with a cold deformation strain was studied using the model alloys Cu–11Fe, Cu–14Fe, and Cu–17Fe, and the effect of the strain on the matrix of the in-situ composites was studied using the model alloys Cu–3Fe and Cu–4.3Fe. The tensile strength was related to the microstructure and to the theoretical strengthening mechanisms. Based on these experimental data and theoretical insights, a mathematical model was established for the dependence of the tensile strength on the cold deformation strain. For low cold deformation strains, the strengthening mechanism was mainly work hardening, solid solution, and precipitation strengthening. Tensile strength can be estimated using an improved rule of mixtures. For high cold deformation strains, the strengthening mechanism was mainly filament strengthening. Tensile strength can be estimated using an improved Hall–Petch relation.

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“…binary Al-Mg [82] and Al-Fe [83]) and immiscible alloy systems (i.e. binary Cu-Fe [84] and Au-Fe [85], or ternary Cu-Fe-Ag [86] systems) have been consolidated via HPT from metallic powder mixtures, resulting in single-phase or dual-phase nanocrystalline microstructures.…”

Section: Upscaling Hpt and Size Limits Of Hybrid Samplesmentioning

confidence: 99%

Metal hybrids processed by high-pressure torsion: synthesis, microstructure, mechanical properties and developing trends

Hernández-Escobar

Kawasaki

Boehlert

2021

International Materials Reviews

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The tradeoff between strength and ductility has long been identified as the 'Achilles' heel' of the mechanical properties in engineering applications. Metal hybrids processed by severe plastic deformation (SPD) have gained significant attention in recent years, as they have shown potential for enhancing strength and ductility simultaneously through different heterostructured designs. Among SPD processes, high-pressure torsion (HPT) is considered the most effective in grain refinement and offers excellent versatility for synthesising new materials with a wide variety of experimental setups and processing parameters. This review article describes the current state-of-the-art of metal hybrids processed by HPT, characterised by heterogeneous microstructures (i.e. nanoscale and/or microscale), through a comprehensive study of their synthesis-microstructure-property relationships. The potential of HPT-processed hybrids is highlighted and discussed along with their limitations. Suggestions are provided with the aim to advance current research trends towards future application in high-impact technologies, including the biomedical and microelectronic industries.

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Impact of interfaces on the radiation response and underlying defect recovery mechanisms in nanostructured Cu-Fe-Ag

Cited by 20 publications

References 89 publications

High-Pressure Torsion Deformation Induced Phase Transformations and Formations: New Material Combinations and Advanced Properties

High-Pressure Torsion Deformation Induced Phase Transformations and Formations: New Material Combinations and Advanced Properties

Microstructure and Strengthening Model of Cu–Fe In-Situ Composites

Metal hybrids processed by high-pressure torsion: synthesis, microstructure, mechanical properties and developing trends

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