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.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the microstructure of the spray-formed Al-10.8Zn-2.8Mg-1.9Cu alloy was investigated by optical microscopy and field emission scanning electron microscopy.
Abstract: In this work, Al-10.8Zn-2.8Mg-1.9Cu alloy was manufactured by the spray forming technique. The microstructure of the spray-formed alloy was investigated by optical microscopy and field emission scanning electron microscopy. The results indicated that the porosity in the spray-deposited alloy was mainly composed of interstices, interconnected pores and gas pores. The distribution and types of porous defects were different, responding to position of the preform.
1 citations
TL;DR: In this article, the microstructure of an as-deposited alloy is fine and homogeneous and in-situ TiC particles prevent the unsteady phases from coming into being.
Abstract: Heat-resistant Al-Fe-V-Si aluminum alloys enhanced by in-situ TiC particles have been prepared by spray forming process with suitable process parameters. Research results show that the microstructure of as-deposited alloy is fine and homogeneous. In-situ TiC particles prevent the unsteady phases from coming into being. On the other hand, the TiC particles increase the volume fraction of heat-resistant phases. So the mechanical properties of the enhanced alloy by in-situ TiC particles are better than that of Al-Fe-V-Si alloy without TiC particles. The hot extrusion temperature is also an important parameter to understand. Under the permission, it is better to extrude the alloy at lower temperature. The tensile strength of the alloy without TiC particles is about 435MPa at room temperature and is about 204MPa at 350°C. However, when the alloy is enhanced by in-situ TiC particles, the strength of alloy is about 482MPa at room temperature and is about 224MPa at 350°C temperature.
1 citations
Patent•
04 Jul 2001
TL;DR: In this article, a method for manufacturing an aluminum alloy which has superior heat resistance and abrasion resistance by adding Ti to an existing alloy of Al-(12-35wt.%)Si-(2-15wt.%).
Abstract: PURPOSE: A method for manufacturing an aluminum alloy is provided which has superior heat resistance and abrasion resistance by adding Ti to an existing alloy of Al-(12-35wt.%)Si-(2-15wt.%)(Fe+V) using spray forming, thereby obtaining a structure in which fine abrasion resistant particles and heat resisting dispersion phase are uniformed distributed. CONSTITUTION: In manufacturing an aluminum alloy using spray forming, the method for manufacturing a heat and abrasion resistant aluminum alloy comprises the steps of manufacturing a mother alloy in which Ti is added to an Al-(12-35wt.%)Si-(2-15wt.%)(Fe+V) alloy; manufacturing a spray formed material by spraying the molten material after remelting the manufactured mother alloy in a spray casting apparatus; and hot or cold processing the manufactured spray formed material, wherein the mother alloy is manufactured by adding 0.1 to 5.0 wt.% of Ti to the Al-(12-35wt.%)Si-(2-15wt.%)(Fe+V) alloy, and a temperature of the mother alloy molten material is maintained to a temperature of 900 to 1400 deg.C in the spray formed material manufacturing step.
1 citations
Journal Article•
TL;DR: In this paper, the effects of different solution treatments on microstructure and properties of spray formed superalloy GH742y after forged were studied, and the results showed that spray-formed super alloy exhibited homogenous composition, segregation-free and fine micro-structure.
Abstract: The effects of different solution treatments on microstructure and properties of spray formed superalloy GH742y after forged were studied.The results showed that spray formed superalloy GH742y exhibited homogenous composition,segregation-free and fine microstructure.The grain size was about 35μm and hasn't changed with increasing temperature.The solvus temperature of γ′phase was about 1130℃.The shape and size of γ′phase were different,but mechanical properties of GH742y did not change after different heat treatments.The yield strength and stress rupture time of the alloy reached 1150MPa and 200h respectively in different heat treatments.
1 citations
TL;DR: The microstructure characteristics of spray-formed and melt-spun Al85Nd5Ni10 and Al89La6Ni5 alloys were studied in this paper.
Abstract: The microstructure characteristics of the spray-formed and melt-spun Al85Nd5Ni10 and Al89La6Ni5 alloys were studied. The spray forming process was demonstrated to produce a bulk scale hybrid composite consisting of amorphous and nanostructured phases directly without the need of an amorphous precursor. The spray-formed Al89La6Ni5 deposit (~1 mm in thickness) were partially amorphous, and the amorphous phase came from the undercooled liquid droplets upon deposition. The as-spray-formed Al85Nd5Ni10 deposit (~20 mm in thickness) was completely crystallized due to the devitrification of the retained amorphous phase to nano-scale secondary crystals upon deposition. Primary crystals (~1 μm) are dispersed uniformly in the bulk spray-formed amorphous/or partial amorphous composites and many distinctive deformation twins also are observed in the crystals, however, not twins found in the corresponding completely devitrified ribbon. This is mainly because of the stirring and impacting force offered by high velocity droplets during spray forming and the mismatch of thermal expansion coefficient between primary crystals and adjacent amorphous matrix.
1 citations