Fabrication of nanocomposites through diffusion bonding under high-pressure torsion

Kawasaki, Megumi; Han, Jae-Kyung; Lee, Dong Hoon; Jang, Jae-il; Langdon, Terence G.

doi:10.1557/jmr.2018.205

Cited by 49 publications

(57 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…9a. Figure 9b shows a vertical cross-section of the HPTprocessed Al-Mg system after 10 turns at 6.0 GPa from the five stacked disks (upper) and a similar result for the same Al-Mg system from three stacked disks processed by HPT for 20 turns under the same pressure of 6.0 GPa (lower) [26]. Inspection shows that these different conditions both exhibit a similar and consistent microstructural formation where the central region after HPT has clear separations of the Al and Mg phases but this changes to a complex mixture of ultrafine Al and Mg phases towards the edges of both disks.…”

Section: Effect Of Hpt Processing With Additional Diskssupporting

confidence: 54%

See 1 more Smart Citation

Fabrication of High Strength Hybrid Materials through the Application of High-Pressure Torsion

Kawasaki

Langdon

2018

Acta Phys. Pol. A

View full text Add to dashboard Cite

It is well established that bulk nanostructured materials with ultrafine grains can be fabricated through the application of severe plastic deformation (SPD) since this is a promising technique for achieving significant grain refinement in bulk metals. Among the various potential SPD techniques, the most attractive appears to be processing by high-pressure torsion (HPT) because this leads to exceptional grain refinement and to grain sizes that are generally not achieved using other SPD procedures. This report describes very recent attempts to form metal matrix nanocomposites (MMNCs) by processing two dissimilar commercial metals, such as aluminum and magnesium alloys, through the use of HPT at room temperature. After significant evolutions in microstructure during the HPT processing, it is demonstrated that hybrid systems may be successfully fabricated having unique microstructures in the form of multi-layered structures. The evolution of small-scale mechanical properties was examined through the novel technique of nanoindentation and the improvement in plasticity was directly estimated by calculating the strain rate sensitivity after processing by HPT. These results demonstrate the possibility of using HPT processing for the fabrication of MMNCs having exceptional properties including very high strength.

show abstract

Section: Effect Of Hpt Processing With Additional Diskssupporting

confidence: 54%

“…(a) Schematic illustration of HPT processing for five stacked disks of two different metals and (b) microstructures taken at the cross-sections of the Al-Mg systems processed by HPT for 5 disks taken through 10 turns (upper) and 3 disks taken through 20 turns (lower)[26].…”

mentioning

confidence: 99%

Fabrication of High Strength Hybrid Materials through the Application of High-Pressure Torsion

Kawasaki

Langdon

2018

Acta Phys. Pol. A

View full text Add to dashboard Cite

show abstract

“…Enhanced mechanical properties and functionality were demonstrated by the extended strength and plasticity 25,27,28) of the AlMg system and these developments were anticipated by the fast atomic diffusivity of Mg which was attributed to the high pressure atmosphere in the Al matrix during HPT. 26) This HPT processing procedure was further applied for several different metal systems including AlCu, 29) AlTi and Al Fe 30) and MgZn. 31) It should be noted that the stacking order of the dissimilar alloy disks for the HPT processing follows the successful cladding of Al and Cu plates that was presented earlier by the accumulative roll bonding process in which a hard phase of Cu was placed between the soft phase of Al.…”

Section: (C) and (D)mentioning

confidence: 99%

Bulk-State Reactions and Improving the Mechanical Properties of Metals through High-Pressure Torsion

et al. 2019

Self Cite

View full text Add to dashboard Cite

This report presents an overview of recent studies demonstrating a bulk-state reaction involving mechanical bonding through the application of high-pressure torsion (HPT) processing on two dissimilar engineering metals. This processing approach was developed by revising the sample setup and applying the simple procedure of alternately stacking two different metal disks using several different metal combinations. Thus, this report describes the development in microstructure after the bulk-state reactions and the mechanical properties of the HPT-induced AlMg, AlCu, AlFe and AlTi alloy systems. A microstructural evaluation confirmed the capability of the HPT procedure for the formation of heterostructures across the disk diameters in these processed alloy systems. Tribology tests and hardness values together with density measurements demonstrated an improved wear resistance and an exceptional specific strength in these alloy systems. The bulk-state reaction by HPT demonstrates a considerable potential for the bonding of dissimilar metals and the fabrication of unique metal systems.

show abstract

“…Magnesium‐based nanocomposites may be produced also by using HPT processing with discs of different materials . Thus, discs of a magnesium ZK60 alloy were placed between two discs of an aluminum 1050 alloy and processed by HPT where Figure a shows the appearance of the processed material after 1 and 5 turns and details of the structures at the center and at the edge of the disc processed by 5 turns are given in Figure b and c, respectively.…”

Section: Fabrication Of Compositesmentioning

confidence: 99%

Processing Magnesium and Its Alloys by High‐Pressure Torsion: An Overview

Figueiredo

Langdon

2018

Adv Eng Mater

Self Cite

View full text Add to dashboard Cite

Magnesium and its alloys have attracted significant attention in recent years because they display high strength-to-density ratios, they are biodegradable and they provide a potential for hydrogen storage. Many investigations have examined the effect of high-pressure torsion processing on the microstructures and properties of these materials so that numerous reports are now available. This overview provides a summary of the observations reported to date on the structure and mechanical property evolution including the nature of grain refinement, the grain boundary misorientation distributions, texture evolution, and the minimum grain size. For convenience, the mechanical properties are separated into hardness, tensile behavior, and superplastic properties. It is shown that the mechanism of grain refinement differs from other metallic materials processed by severe plastic deformation but high strength may be achieved in magnesium alloys and exceptional ductility in pure magnesium. Hydrogen storage and corrosion behavior are also examined together with a discussion of recent attempts to produce magnesium-based nanocomposites through processing by high-pressure torsion.

show abstract

Fabrication of nanocomposites through diffusion bonding under high-pressure torsion

Abstract: Abstract

Cited by 49 publications

References 63 publications

Fabrication of High Strength Hybrid Materials through the Application of High-Pressure Torsion

Fabrication of High Strength Hybrid Materials through the Application of High-Pressure Torsion

Bulk-State Reactions and Improving the Mechanical Properties of Metals through High-Pressure Torsion

Processing Magnesium and Its Alloys by High‐Pressure Torsion: An Overview

Contact Info

Product

Resources

About