Topic
Spray forming
About: Spray forming is a research topic. Over the lifetime, 1153 publications have been published within this topic receiving 12869 citations. The topic is also known as: spray casting & spray deposition.
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01 Jul 2004-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: The microstructures and properties of Al-based alloys produced by severe plastic deformation under high pressure torsion straining were compared with alloys of the same compositions consolidated by hot extrusion and spray-forming processing as discussed by the authors.
Abstract: The microstructures and properties of Al-based alloys produced by severe plastic deformation under high pressure torsion straining were compared with alloys of the same compositions consolidated by hot extrusion and spray-forming processing. Partially amorphous alloy powders of two systems were studied; Al 90 Fe 7 Z 3 alloy powders were prepared by high-energy ball milling and Al 84 Y 3 Ni 8 Co 4 Zr 1 +SiC composite powder was prepared by gas atomisation. The alloy powders have been cold consolidated by high-pressure torsion straining under a stress of 5 GPa resulting in refined and uniform microstructures, with hardness values well above the measured values for the hot-extruded Al 90 Fe 7 Z 3 alloy and for the spray-deposited Al 84 Y 3 Ni 8 Co 4 Zr 1 +SiC composite alloy.
49 citations
TL;DR: In this article, the wear behavior of Al-2Mg-11TiO2 composites prepared through spray forming and stir casting techniques are studied. But, the wear rate of spray formed composites is significantly lower than the base alloy and stir cast composite under same sliding condition.
48 citations
Book•
01 Jan 2004TL;DR: In this paper, the authors provide an introduction to the various modelling and simulation techniques employed in spray forming, and show how they are applied in process analysis and development, wherever possible, they discuss theoretical results with reference to experimental data.
Abstract: Spray forming combines the metallurgical processes of metal casting and powder metallurgy to fabricate metal products with enhanced properties. This book provides an introduction to the various modelling and simulation techniques employed in spray forming, and shows how they are applied in process analysis and development. The author begins by deriving and describing the main models. He then presents their application in the simulation of the key features of spray forming. Wherever possible he discusses theoretical results with reference to experimental data. Building on the features of metal spray forming, he also derives common characteristic modelling features that may be useful in the simulation of related spray processes. The book is aimed at researchers and engineers working in process technology, chemical engineering and materials science.
48 citations
TL;DR: In this paper, the microstructure of composites and their electrical conductivity have been investigated and a uniform dispersion of large size particulate phase in the matrix of the primary α-phase with its equiaxed grain morphology was observed at the grain boundary and grain junctions.
Abstract: Al- SiCp composites have been synthesized by spray forming process with variation in particle flow rate, size of reinforcement particles and their volume fraction. The microstructure of composites and their electrical conductivity have been investigated. The results showed a uniform dispersion of large size particulate phase in the matrix of the primary α- phase with its equiaxed grain morphology. However, clustering of small size particles was observed at the grain boundary and grain junctions. The grain size of the composite materials was observed to be lower than that of the base Al- alloy. The composite materials invariably indicated their lower electrical conductivity compared to that of the monolithic Al- alloy. The electrical conductivity of composites decreased with increase in the volume fraction and decrease in size of the reinforcement particles. A high flow rate of particles during spray deposition resulted in a decrease in its conductivity. These results are explained in the light of thermal mismatch between the matrix and the reinforcement phases resulting in generation of high dislocation density. The droplet- particle interaction and resulting microstructure evolution during the spray deposition of the composites are discussed.
48 citations
25 Mar 2007-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the magnetic properties of spray-formed Fe 6.5 ¼ W.% Al alloy were determined in the as-sprayed condition and after hot/cold rolling.
Abstract: The Fe–6.5 wt.% Si alloy is an excellent soft magnetic material. However, it is too brittle to be hot/cold-rolled since its ordered structure induces the formation of dissociated superlattice dislocations and correlated high stress concentrations leading to premature fracture. The addition of aluminum to high silicon electrical steels, combined with high solidification rates of the spray forming process, can alter the kinetics of these ordering transformations offering the possibility to obtain thin sheets through the hot/cold rolling process. The aim of this work was to determine the magnetic properties of spray-formed Fe–6.5 wt.% Si–1.0 wt.% Al alloy in the “as-sprayed” condition and after hot/cold rolling. After annealing at 973 K for 1 h, the best magnetic properties were observed in the rolled samples. This result is due to the elimination of microstructural defects and porosity and the formation of DO 3 ordered structure.
47 citations