Journal ArticleDOI
A reciprocating extrusion process for producing hypereutectic Al-20wt. % Si wrought alloys
TLDR
A reciprocating extrusion process has been developed for producing hypereutectic Al-20wt.% Si alloys with fine and uniform microstructures and superior properties as discussed by the authors.Abstract:
A reciprocating extrusion process has been developed for producing hypereutectic Al–20wt.% Si alloys with fine and uniform microstructures and superior properties. Rapidly-solidified layers and cast billets are used as the starting materials. The results show that the interfaces between the layers of the rapidly-solidified alloys could be fully eliminated, and strength and ductility are both improved as the number of extrusion passes increases. For the ingot-processed alloys, the plate-like Si phase in the eutectic and enormous primary Si crystals are refined to a large extent and thus both strength and ductility are increased by 9 and 67%, respectively. Because of having finer Si particles, the rapidly-solidified alloys exhibit a superior combination of mechanical properties to that of the ingot-processed alloys. Fractography demonstrates that the larger Si particles in the ingot-processed material increased the amount of cleavage failure processes.read more
Citations
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Effect of heat treatment on AlSi10Mg alloy fabricated by selective laser melting: Microstructure evolution, mechanical properties and fracture mechanism
TL;DR: In this paper, the influence of solution and artificial aging heat treatments on the microstructures and mechanical properties of SLM-produced AlSi10Mg alloy parts was investigated.
Journal ArticleDOI
Influence of Annealing on Mechanical Properties of Al-20Si Processed by Selective Laser Melting
Pan Ma,Konda Gokuldoss Prashanth,Sergio Scudino,Yandong Jia,Hongwei Wang,Chunming Zou,Zunjie Wei,J. Eckert +7 more
TL;DR: In this paper, the microstructure and mechanical properties of Al-20Si produced by selective laser melting (SLM) are investigated for different heat treatment conditions, where the Si particles become coarser and the eutectic Si gradually changes its morphology from fibrous to plate-like shape with increasing annealing temperature.
Journal ArticleDOI
Microstructure and high tensile ductility of ZK60 magnesium alloy processed by cyclic extrusion and compression
TL;DR: In this article, the microstructure and texture development of an extruded ZK60 Mg alloy during cyclic extrusion and compression (CEC) at 230°C was investigated.
Journal ArticleDOI
Microstructure evolution in magnesium alloy AZ31 during cyclic extrusion compression
TL;DR: The microstructure evolution of an AZ31 Mg alloy during cyclic extrusion compression (CEC) was investigated by optical microscopy, TEM and electron backscatter diffraction (EBSD) as discussed by the authors.
Journal ArticleDOI
Microstructure evolution of AZ series magnesium alloys during cyclic extrusion compression
TL;DR: In this article, electron backscatter diffraction, transmission electron microscopy (TEM) and optical microscopy were employed to characterize the microstructure evolution of AZ31, AZ61 and AZ91 Mg alloys during cyclic extrusion compression (CEC).
References
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Journal ArticleDOI
Aluminium powder metallurgy technology for high-strength applications
TL;DR: A literature survey of aluminium powder metallurgy (PM) for high-strength applications was undertaken in this article, with particular emphasis on high strength, corrosion-resistant alloys and alloys developed for use at elevated temperatures.
Journal ArticleDOI
Spray deposition of metals: A review
TL;DR: The development of spray atomization and collection processes was motivated by the severe problems of oxide contamination associated with quenched reactive metal powders as well as by the need to minimize the overall number of processing steps from the liquid metal to fully dense product, perhaps in the near-net shape state.
Journal ArticleDOI
Characteristics of rapidly solidified Al-Si-X powders for high-performance applications
J. L. Estrada,Jurek Duszczyk +1 more
TL;DR: In this article, the authors present the characteristics of the air-atomized AlSi-X P/M powders, aimed at optimizing the processing conditions of the final products, in terms of production techniques, powder morphologies, powder sizes and size distributions, cooling rates, specific areas, surface oxide thicknesses and oxygen contents.
Journal ArticleDOI
Rapid solidification processing of 7XXX aluminium alloys: A review
TL;DR: A review of the development of 7XXX aluminum alloys produced by rapid solidification processing is presented in this article, where the relevant parameters of the rapid solidization techniques discussed are presented, as well as the resulting mechanical properties of the rapidly solidified alloys.
Patent
Dispersion strengthened aluminum alloys
TL;DR: In this paper, a process for obtaining low density aluminum-base alloys having high strength in the forged condition comprising an interrelated control of the extrusion and forging conditions is provided.