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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TL;DR: In this paper, a spray-formed Al-Zn-Mg-Cu alloy was prepared by spray forming process and the precipitate behavior and microstructure of the extruded alloy were also investigated.
Abstract: A high Zn content Al-Zn-Mg-Cu alloy was prepared by spray forming process and the precipitate behavior and microstructure of the extruded alloy were also investigated. The precipitate sequence of the spray-formed alloy could be described as “α-solid solution → GPI zone → GPII zone (also called Metastable ′ )→ Stable (MgZn2)” during artificial ageing treatment. In the early stage of artificial ageing treatment, the GPI zone was the main strengthening phase and kept coherent relationship with the matrix. With the increasing of ageing time, ′ phase dominate strengthening phase and kept semi-coherent relationship with the matrix. With the further increasing of ageing time, phase took the place of ′ phase, and dominated the strengthening phase in the alloy. The grain size of the spray deposit is finer than that of cast alloys. The ultimate tensile strength of the alloy is over 810MPa in peak ageing condition.
TL;DR: In this paper, a spray forming method and hot extrusion was used to extract the microstructure of Al-Zn-Mg-Cu alloy and the results showed that after being hot extruded and solid solution treated, the Al alloy matrix had uniformly fine recrystallized grain with an average size of 8μm.
Abstract: Al-Zn-Mg-Cu alloy containing 2%Mn was made using spray forming method and hot extrusion. XRD, OM, and SEM were used to investigate the microstructure. Results showed that after being hot extruded and solid solution treated, the Al alloy matrix had uniformly fine recrystallized grain with an average size of 8μm. The particles of MnAl6 were formed during the spray forming process and distributed along the grain boundary. Deformation and spheroidization of MnAl6 particles were occurred during post hot extrusion and solid solution treament, which would be benefit to the improvement of toughness of Al alloy. When aged at the T6 conditions, the tensile strength of the Al alloy was increased up to 775MPa with the elongation of 4.3%, the fracture surface consisted mainly of dimples with a size lower than 500nm.
TL;DR: In this paper , a comprehensive review of these strengthening technologies is conducted to illuminate the possible correlations between the strengthening mechanisms and the resultant deposit microstructures and mechanical properties, and provide guidance for the cold spray community to develop new strengthening strategies for future high-quality mass production.
01 Jan 2021
TL;DR: In this paper, an efficient spray forming technique was utilized to cast Pb-added Al-Si alloys, which were then rolled to different percentages (0-80%) using rolling machine and microstructural characteristics as well as porosity behavior of casting alloy were systematically studied.
Abstract: An efficient spray forming technique was utilized to cast Pb-added Al-Si alloys. It was then rolled to a different percentages (0–80%) using rolling machine and microstructural characteristics as well as porosity behavior of casting alloy were systematically studied. It is noteworthy that the distribution of Pb was nearly uniform all through the aluminum phase and it was mainly at the grain boundary. Also, the grains of aluminum were found to be elongated along the rolling direction after 80% rolling. Porosity was minimum at peripheral region of the deposit and it decreased as rolling percentage is increased.