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Alloy Sheet (alloy + sheet)

Distribution by Scientific Domains
Polymers and Materials Science100%

Selected Abstracts

Achieving Low Temperature Superplasticity from Ca-Containing Magnesium Alloy Sheets,

ADVANCED ENGINEERING MATERIALS, Issue 7 2009
Woo-Jin Kim
The application of hot extrusion and high-speed-ratio differential speed rolling (HRDSR) to a Ca-containing Mg -3Al1Zn magnesium alloy, processed by electromagnetic casting in the presence of electromagnetic stirring, produced a novel microstructure, composed of an ultrafine grain size of less than 1,,m and very fine (Al,Mg)2Ca particles that were uniformly and densely distributed over the matrix. The HRDSR processed alloy exhibited excellent superplasticity at relatively low temperatures (below 523,K). [source]

Effect of thermal exposure on the microstructure, tensile properties and the corrosion behaviour of 6061 aluminium alloy sheet

MATERIALS AND CORROSION/WERKSTOFFE UND KORROSION, Issue 4 2005
R. Braun
See original Materials and Corrosion 2005, 56, No. 3, p. 159,165 (2005) [source]

Effect of thermal exposure on the microstructure, tensile properties and the corrosion behaviour of 6061 aluminium alloy sheet

MATERIALS AND CORROSION/WERKSTOFFE UND KORROSION, Issue 3 2005
R. Braun
Abstract Sheet material of the Al-Mg-Si alloy 6061 in the tempers T4 and T6 was thermally exposed at temperatures ranging from 85 to 120°C for 1000 h. The microstructure, tensile properties and the corrosion behaviour in the different heat treatment conditions were investigated using differential scanning calorimetry and transmission electron microscopy as well as performing tensile tests and various corrosion tests. The additional heat treatments, which should simulate aging during long-term service usage, caused an increase in strength of 6061-T4 sheet, associated with changes in the naturally aged microstructure. Thermal exposure at 120°C for 1000 h resulted in tensile and corrosion properties being similar to those obtained for peak-aged sheet. Alloy 6061 in the T6 temper exhibited microstructural stability when additionally heat treated at 85 and 120°C for 1000 h. No significant alterations in the microstructure, tensile properties, and corrosion performance were observed after exposure to slightly elevated temperatures. [source]

Constituent Particle Break-Up During Hot Rolling of AA 5182,

ADVANCED ENGINEERING MATERIALS, Issue 1-2 2010
Nicolas Moulin
Aluminum sheet is currently used for body panels on a number of mass-produced vehicles, in particular for closure panels. AA5xxx alloys always contain coarse inter-metallic particles (Alx(Fe,Mn)ySi, Mg2Si) after casting. In the present work inter-metallic particle break-up during hot reversible rolling of AA5182 alloy sheets has been analyzed. The sizes and shapes of inter-metallic particles in as-cast and industrially hot rolled AA5182 alloys sheets were characterized by 3D X-ray tomography observations. The relation between particle break-up and particle morphology was then analyzed statistically and by a micromechanical finite element (FE)-based model. The essential outcomes of the statistical approach may be summarized as follows. The inter-metallic particle population may be described by five morphological parameters. Secondly the comparison of the particle morphology in as cast and industrially rolled sheets leads to the definition of five classes. The evolution of each particle class as function of the rolling strain is provided. The statistical analysis shows which particles break-up. The stresses and strains in inter-metallic particles, embedded in an elasto-viscoplastic aluminum matrix submitted to plane strain compression, were analyzed by an FE model. A new failure criterion was proposed. The essential outcomes of the mechanical approach are as follows: a precise description of stress concentration mechanisms in nonconvex particles, a close description of the parameters controlling particle break-up, and finally a simplified classification of the failure behavior. [source]

Aluminium Foam Sandwich Panels: Manufacture, Metallurgy and Applications

ADVANCED ENGINEERING MATERIALS, Issue 9 2008
J. Banhart
Abstract Sandwich panels consisting of a highly porous aluminium foam core and aluminium alloy face sheets are manufactured by roll-bonding aluminium alloy sheets to a densified mixture of metal powders , usually Al-Si or Al-Si-Cu alloys with 6,8% Si and 3,10% Cu , and titanium hydride, and foaming the resulting three-layer structure by a thermal treatment. We review the various processing steps of aluminium foam sandwich (AFS) and the metallurgical processes during foaming, compare the process to alternative ways to manufacture AFS, e.g. by adhesive bonding, and give an overview of the available literature. Two ways to treat AFS after foaming are presented, namely forging and age-hardening. Some current and potential applications are described and the market potential of AFS is assessed. [source]

Constituent Particle Break-Up During Hot Rolling of AA 5182,

ADVANCED ENGINEERING MATERIALS, Issue 1-2 2010
Nicolas Moulin
Aluminum sheet is currently used for body panels on a number of mass-produced vehicles, in particular for closure panels. AA5xxx alloys always contain coarse inter-metallic particles (Alx(Fe,Mn)ySi, Mg2Si) after casting. In the present work inter-metallic particle break-up during hot reversible rolling of AA5182 alloy sheets has been analyzed. The sizes and shapes of inter-metallic particles in as-cast and industrially hot rolled AA5182 alloys sheets were characterized by 3D X-ray tomography observations. The relation between particle break-up and particle morphology was then analyzed statistically and by a micromechanical finite element (FE)-based model. The essential outcomes of the statistical approach may be summarized as follows. The inter-metallic particle population may be described by five morphological parameters. Secondly the comparison of the particle morphology in as cast and industrially rolled sheets leads to the definition of five classes. The evolution of each particle class as function of the rolling strain is provided. The statistical analysis shows which particles break-up. The stresses and strains in inter-metallic particles, embedded in an elasto-viscoplastic aluminum matrix submitted to plane strain compression, were analyzed by an FE model. A new failure criterion was proposed. The essential outcomes of the mechanical approach are as follows: a precise description of stress concentration mechanisms in nonconvex particles, a close description of the parameters controlling particle break-up, and finally a simplified classification of the failure behavior. [source]