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Journal ArticleDOI

Development of Cu particles and Cu core-shell particles reinforced Al composite

01 Mar 2015-Materials Science and Technology (Taylor & Francis)-Vol. 31, Iss: 4, pp 494-500
TL;DR: In this article, a non-equilibrium particulate composite was developed by incorporating and retaining in elemental state in an aluminium matrix by friction stir processing, which was stable up to a temperature of more than 300°C.
Abstract: Copper particles were incorporated and retained in elemental state in an aluminium matrix by friction stir processing thereby producing a non-equilibrium particulate composite. The processed Al–Cup composite exhibited improved strength with significantly high ductility. The composite was stable up to a temperature of more than 300°C. Thermal exposure at 350°C for more than 10 min led to diffusion of Cu atoms into the Al matrix forming a core-shell type structure in the Cu particles and thus producing an Al–Cu core-shell composite. The shell consists of multiple layers, the thickness of which was controllable.
Citations
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Book ChapterDOI
01 Jan 1987
TL;DR: In this article, the authors presented a theory of liquid alloys and assembled all the necessary tools for the ab initio construction of an alloy phase diagram, which they used to construct a phase diagram.
Abstract: With the presentation of a theory of liquid alloys, we have now assembled all the necessary tools for the ab initio construction of an alloy phase diagram.

417 citations

Journal ArticleDOI
TL;DR: The research works of graphene-reinforced metal matrix composites are summarized in this paper, where the microstructure and mechanical properties, processing techniques, graphene dispersion, strengthening mechanisms, interfacial reactions between graphene and the metal matrix and future research works in this field are discussed.
Abstract: The research works of graphene-reinforced metal matrix composites will be summarised in this paper. Comparatively, much less research works have been undertaken in this field. Graphene has been thought to be an ideal reinforcement material for composites due to its unique two-dimensional structure and outstanding physical and mechanical properties. It is expected to yield structural materials with high specific strength or functional materials with exciting thermal and electrical characteristics. This paper will introduce all kinds of graphene-reinforced metal matrix composites that have been studied. The microstructure and mechanical properties, processing techniques, graphene dispersion, strengthening mechanisms, interfacial reactions between graphene and the metal matrix and future research works in this field will be discussed.

215 citations


Cites background from "Development of Cu particles and Cu ..."

  • ...As pointed out by the author, this was a novel processing route; later other similar fraction stir processing was reported to fabricate Al matrix composites.(26,66) Figure 37 shows the process schematic....

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Journal ArticleDOI
TL;DR: In this article, the authors used molybdenum (Mo) as potential reinforcement for aluminum matrix composites produced using friction stir processing (FSP) to improve ductility.

92 citations

Journal ArticleDOI
TL;DR: In this article, an attempt was made to reinforce stainless steel (SS) particles to prepare AA6082/(0,6,12 and 18vol%) SS AMCs via friction stir processing (FSP).
Abstract: Aluminum matrix composites (AMCs) reinforced with various ceramic particles usually exhibit poor ductility. One solution to increase ductility is the usage of hard metallic or alloy particles as reinforcements. An attempt was made to reinforce stainless steel (SS) particles to prepare AA6082/(0,6,12 and 18 vol%) SS AMCs via friction stir processing (FSP). SS particles were effectively embedded in the aluminum matrix in its alloy form without any detrimental interfacial reaction. The distribution of SS particles in the composite was fairly homogenous. All regions inside the stir zone were filled with SS particles. The composite showed equiaxed fine grains due to dynamic recrystallization and pinning effect. The incorporation of SS particles enhanced the tensile strength of the composites without sacrificing ductility. A network of well developed dimples was observed on the fracture surfaces of the composites ensuring ductility.

62 citations

Journal ArticleDOI
TL;DR: In this paper, tungsten particles were dispersed into 1060 Al matrix by multi-pass friction stir processing (FSP) to fabricate W/1060Al composites and the effects of the number of FSP passes on the microstructure, mechanical properties and electrical resistivity were investigated.
Abstract: In this paper, tungsten particles were dispersed into 1060 Al matrix by multi-pass friction stir processing (FSP) to fabricate W/1060Al composites. The effects of the number of FSP passes on the microstructure, mechanical properties and electrical resistivity were investigated. Microstructural observations revealed that increasing the number of FSP passes contributed to W uniform distribution and grain refinement without changing the size and morphology of W particles. Detailed interfacial microstructure analysis indicated that an excellent metallurgical bonding consisting of an element solid solution was formed at the W/Al interface. The mechanical test results showed that, as the number of FSP passes increased, the microhardness values were remarkably enhanced with a more uniform distribution and at the same time both the strength and ductility of FSPed composites were also improved. The maximum microhardness, strength and ductility were achieved in 5-pass FSPed composite reaching to approximate 86 HV, 126 MPa and 24%, respectively. It was also found that the W particles reinforced Al composites exhibited excellent electrical conductivity and increasing the number of FSP passes caused a negligible enhancement in the electrical resistivity of FSPed composites.

59 citations

References
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Book
07 Nov 1996
TL;DR: In this paper, the authors discuss the extent to which we are able to formulate quantitative, physically-based models which can be applied to metal-forming processes, and the subjects treated in this book are all active research areas and form a major part of at least four regular international conference series.
Abstract: Paperback. The annealing of deformed materials is of both technological importance and scientific interest. The phenomena have been most widely studied in metals, although they occur in all crystalline materials such as the natural deformation of rocks and the processing of technical ceramics. Research is mainly driven by the requirements of industry, and where appropriate, the book discusses the extent to which we are able to formulate quantitative, physically-based models which can be applied to metal-forming processes.The subjects treated in this book are all active research areas, and form a major part of at least four regular international conference series. However, there have only been two monographs published in recent times on the subject of recrystallization, the latest nearly 20 years ago. Since that time, considerable advances have been made, both in our understanding of the subject and in the techniques available to the researcher.The

7,149 citations

Book
01 Jan 1992
TL;DR: In this article, an introductory source aimed at practicing engineers and material scientists, the text explains how to use phase diagrams, and more than 1,000 binary and 300 ternary diagrams included cover most commercial alloy systems; compositions are presented in weight percent.
Abstract: An introductory source aimed at practicing engineers and material scientists, the text explains how to use phase diagrams. The more than 1,000 binary and 300 ternary diagrams included cover most commercial alloy systems; compositions are presented in weight percent. Appendices include the melting and boiling points of the elements, their allotropic transformation and magnetic transition temperatures and their crystal structures.

2,882 citations

Book
01 Jan 1993
TL;DR: In this article, the Eshelby approach is used to model composites and a program for calculating the S-tensors of a composite model is presented, along with a list of programs for an Eshelbys calculation.
Abstract: Preface 1. General introduction 2. Basic composite models 3. The Eshelby approach to modelling composites 4. Plastic deformation 5. Thermal effects and high temperature behaviour 6. The interfacial region 7. Fracture processes and failure mechanisms 8. Transport properties and environmental performance 9. Fabrication processes 10. Development of matrix microstructure 11. Testing and characterisation techniques 12. Applications Appendix 1. Nomenclature Appendix 2. Matrices and reinforcements - selected thermophysical properties Appendix 3. The basic Eshelby S-tensors Appendix 4. Listing of a program for an Eshelby calculation.

1,826 citations

Journal ArticleDOI
TL;DR: Friction stir welding (FSW) is an emerging metalworking technique that can provide localized modification and control of microstructures in near-surface layers of processed metallic components.
Abstract: Friction stir processing (FSP), developed based on the basic principles of friction stir welding (FSW), a solid-state joining process originally developed for aluminum alloys, is an emerging metalworking technique that can provide localized modification and control of microstructures in near-surface layers of processed metallic components. The FSP causes intense plastic deformation, material mixing, and thermal exposure, resulting in significant microstructural refinement, densification, and homogeneity of the processed zone. The FSP technique has been successfully used for producing the fine-grained structure and surface composite, modifying the microstructure of materials, and synthesizing the composite and intermetallic compound in situ. In this review article, the current state of the understanding and development of FSP is addressed.

955 citations

01 Jan 1947

812 citations