ChemInform Abstract: STRUCTURAL STATES AND PROPERTIES OF CONDENSED FILMS OF ALUMINUM-COPPER ALLOYS

1978 ◽  
Vol 9 (48) ◽  
Author(s):  
KH. KH. PRIETO ◽  
V. A. DUDKIN
Keyword(s):  
Copper Alloys ◽  
Aluminum Copper Alloys

scholarly journals Numerical investigation of mechanical properties of aluminum-copper alloys at nanoscale

2021 ◽  
Vol 23 (1) ◽  
Author(s):  
Satyajit Mojumder ◽  
Md Shajedul Hoque Thakur ◽  
Mahmudul Islam ◽  
Monon Mahboob ◽  
Mohammad Motalab
Keyword(s):  
Mechanical Properties ◽  
Numerical Investigation ◽  
Copper Alloys ◽  
Aluminum Copper Alloys

Numerical Modeling of Microporosity Formation in Aluminum-Rich Aluminum-Copper Alloys in Microgravity Conditions

2000 ◽  
Author(s):  
M. Xiong ◽  
A. V. Kuznetsov
Keyword(s):  
Copper Alloys ◽  
Heat Transfer Fluid ◽  
Gas Phases ◽  
Alloy Casting ◽  
Cu Alloy ◽  
Aluminum Copper Alloys ◽  
Three Phase ◽  
Microgravity Conditions ◽  
Parametric Analyses ◽  
Solid Liquid

Abstract The microporosity formation in a vertical unidirectionally solidifying Al-4.1%Cu alloy casting is modeled in both microgravity and standard gravity as well as in the conditions of decreased (Moon, Mars) and increased (Jupiter) gravity. Due to the unique opportunities offered by a low-gravity environment (absence of metallostatic pressure and of natural convection in the solidifying alloy) future microgravity experiments will significantly contribute to attaining a better physical understanding of the mechanisms of microporosity formation. One of the aims of the present theoretical investigation is to predict what microporosity patterns will look like in microgravity in order to help plan a future microgravity experiment. To perform these simulations, the authors suggest a novel three-phase model of solidification that accounts for the solid, liquid, and gas phases in the mushy zone. This model accounts for heat transfer, fluid flow, macrosegregation, and microporosity formation in the solidifying alloy. Special attention is given to the investigation of the influence of microporosity formation on the inverse segregation. Parametric analyses for different initial hydrogen concentrations and different gravity conditions are carried out.

The rate of solidification and the effects of local composition on the subsequent nucleation of Al2Cu2Mn3 dispersoid phase in Al-4Cu-0.3Fe-0.4Mn-0.2Si alloys

2004 ◽  
Vol 120 ◽  
pp. 61-68
Author(s):  
T. L. Zoeller ◽  
T. H. Sanders
Keyword(s):  
Aluminum Alloy ◽  
Phase Particle ◽  
Solidification Rate ◽  
Copper Alloys ◽  
Grain Morphology ◽  
Second Phase ◽  
Thermal Treatments ◽  
Local Composition ◽  
Aluminum Copper Alloys ◽  
Alloy Microstructure

Following solidification, an aluminum alloy microstructure is highly segregated. The microstructure consists of cored dendrites with various soluble and insoluble phases present in the inter-dendritic regions. The solidification rate has a marked effect on the amount of coring as well as grain dimensions and second phase particle size and spacing. Post-solidification cooling rates as well as subsequent heat treatments also affect the evolution of the microstructure. Understanding the effects of these thermal treatments is important in explaining differences in microstructures that are observed in alloys of identical compositions. The focus of this study is to determine the interaction between the coring of copper across dendrites during solidification and the precipitation of dispersoids during the homogenization treatments of an alloy. An aluminum alloy whose composition is in the range of Al-4Cu-0.3Fe-0.4Mn-0.2Si is ideally suited for this study for several reasons. First it is similar to a host of commercial aluminum copper alloys, and the presence of Mn, Fe, and Si affect the distribution of particles that control grain morphology in these alloys. Preliminary experimental results are discussed. Current numerical analysis techniques will be examined and possible methods to treat the problem will be presented.

Sign in / Sign up

Export Citation Format

Share Document