Cast Aluminum Alloy Composite, 4.6Cu – 3.4Ti – 1.4B – 0.75Ag – 0.27Mg (A205.0/TiB2/3p-T7P), Investment Cast, Solution and Precipitation Heat Treated

2012 ◽  
Author(s):  
Keyword(s):  
Aluminum Alloy ◽  
Cast Aluminum Alloy ◽  
Alloy Composite ◽  
Cast Aluminum ◽  
Investment Cast ◽  
Heat Treated ◽  
Precipitation Heat

The Effect of Applied Forging Pressure on Primary Structure Deformation in Rheology Forging Process With Solid Fraction Controlled A356 and AA2024 Alloys

2010 ◽  
Vol 132 (2) ◽  
Author(s):  
S. M. Lee ◽  
H. H. Kim ◽  
C. G. Kang
Keyword(s):  
Aluminum Alloy ◽  
Electromagnetic Stirring ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Structure Deformation ◽  
Forging Process ◽  
Heat Treated ◽  
Primary Particles ◽  
Liquid Segregation ◽  
Wrought Aluminum

Mechanical properties and microstructure of heat-treated samples of A356 and AA2024 aluminum alloys, which were rheoforged by varying the change in pressure and temperature were investigated, preventing defects such as porosity, liquid segregation, and insufficient filling occurring during rheoforging process. The rheology material was fabricated by an electromagnetic stirring process by controlling stirring current so that shearing force and temperature of the molten metal were controlled during electromagnetic stirring. As a result, by crushing dendrite and rosette type microstructures, fine and globularized rheology material was obtained and the feasibility of the rheoforging process was found to be positive. In the case of the direct rheoforging process, excessive applied forging-pressure caused material spattering, which in turn caused eutectic segregation. This segregation brought about a shrink hole and thus led to a deterioration of mechanical strength. According to varied applied forging pressures, agglomeration phenomena of primary particles of wrought aluminum alloy remarkably increased as compared with an as-cast aluminum alloy.

scholarly journals FEATURES OF THE DEVELOPMENT OF THE COMPOSITE CARBON GRAPHITE-ALUMINUM ALLOY

2020 ◽  
pp. 79-84
Author(s):  
V. A. Gulevsky ◽  
S. N. Tsurikhin ◽  
N. Yu. Miroshkin ◽  
N. V. Markina ◽  
M. I. Popov
Keyword(s):  
Aluminum Alloy ◽  
Porous Carbon ◽  
Transition Layer ◽  
Aluminum Carbide ◽  
Cast Aluminum Alloy ◽  
Alloy Composite ◽  
Cast Aluminum ◽  
Search Results ◽  
Composite Carbon

The search results of a carbon-graphite-aluminum alloy composite of aluminum carbide Al4C3 and the possibility of controlling the formation of this undesirable phase by organizing a diffusion transition layer are presented. The problem is shown and ways to solve it are proposed for the impregnation of carbon graphite with aluminum or its alloys. For the study, samples were made by impregnating a porous carbon-graphite frame with a cast aluminum alloy.

scholarly journals A Study on High Strength, High Plasticity, Non-Heat Treated Die-Cast Aluminum Alloy

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 295
Author(s):  
Ruizhang Hu ◽  
Chun Guo ◽  
Mingliang Ma
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Aluminum Alloy ◽  
Heat Treating ◽  
Second Phase ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Transmission Electron ◽  
Heat Treated ◽  
Die Cast

The non-heat-treated, die-cast aluminum alloy samples were prepared meticulously via die-casting technology. The crystal structure, microstructure, and phase composition of the samples were comprehensively studied through electron backscatter diffraction (EBSD), metallographic microscopy, spectrometer, and transmission electron microscopy (TEM). The microhardness and tensile properties of the samples were tested. The die-cast samples were found to have desirable properties by studying the structure and performance of the samples. There were no defects, such as pores, cold partitions, or surface cracks, found. The metallographic structure of the samples was mainly α-Al, and various phases were distributed at the grain boundaries. Before heat treating, α-Al grains were mainly equiaxed with a great number of second phase particles at the grain boundaries. After heat treating, the α-Al grains were massive and coarsened, and the second phase grains were refined and uniformly distributed, compared with those before the heat treating. The EBSD results showed that the grain boundary Si particles were solid solution decomposed after heat treatment. The particles became smaller, and their distribution was more uniform. Transmission electron microscopy found that there were nano-scale Al-Mn, Al-Cu, and Cu phases dispersed in the samples. The average microhardness of the samples before heat treating was 114 HV0.1, while, after the heat treating, the microhardness reached 121 HV0.1. The mechanical features of the samples were tremendous, and the obtained die-cast aluminum alloy had non-heat-treatment performance, which was greater than the ordinary die-cast aluminum alloys with a similar composition. The tensile strength of the aluminum alloys reached up to 310 MPa before heat treatment.

THE PROCESS OF NANOMODIFYING CAST ALUMINUM ALLOY INGOTS FOR COMPONENTS OF AEROSPACE VEHICLES

2019 ◽  
Vol 20 (2) ◽  
pp. 268-276
Author(s):  
G. G. Krushenko ◽  
◽  
V. P. Nazarov ◽  
S. N. Reshetnikova ◽  
G. V. Dvirnyi ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Aerospace Vehicles
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