Age-hardening Behavior of MgB2 Particle Dispersed Al Alloy Composite Materials

2012 ◽  
pp. 1039-1042
Author(s):  
Chihaya Kawamoto ◽  
Kenji Matsuda ◽  
Satoshi Murakami ◽  
Daisuke Tokai ◽  
Tokimasa Kawabata ◽  
...  
Keyword(s):  
Composite Materials ◽  
Age Hardening ◽  
Al Alloy ◽  
Alloy Composite ◽  
Hardening Behavior

Age-hardening Behavior of MgB2 Particle Dispersed Al Alloy Composite Materials

2012 ◽  
pp. 1039-1042
Author(s):  
Chihaya Kawamoto ◽  
Kenji Matsuda ◽  
Satoshi Murakami ◽  
Daisuke Tokai ◽  
Tokimasa Kawabata ◽  
...  
Keyword(s):  
Composite Materials ◽  
Age Hardening ◽  
Al Alloy ◽  
Alloy Composite ◽  
Hardening Behavior

Asymmetric cryorolling of AA6061 Al alloy: Strain distribution, texture and age hardening behavior

2018 ◽  
Vol 736 ◽  
pp. 53-60 ◽  
Author(s):  
Danielle Cristina Camilo Magalhães ◽  
Andrea Madeira Kliauga ◽  
Maurizio Ferrante ◽  
Vitor Luiz Sordi
Keyword(s):  
Strain Distribution ◽  
Age Hardening ◽  
Al Alloy ◽  
Hardening Behavior

SLEEM Study of MgAl2O4 at Interface betweeen Al2O3 and Matrix in Al2O3/Al Alloy Composite Materials

2007 ◽  
Vol 539-543 ◽  
pp. 779-784
Author(s):  
Susumu Ikeno ◽  
Kenji Matsuda ◽  
I. Müllerová ◽  
Luděk Frank
Keyword(s):  
Electron Microscope ◽  
Composite Materials ◽  
Low Energy ◽  
Al Alloy ◽  
Alloy Composite ◽  
Orientation Relationships ◽  
Small Particles ◽  
Interaction Volume ◽  
Low Energy Electron ◽  
Scanning Electron

In the present talk, MgAl2O4 in the Al2O3/Al-1.0mass%Mg2Si alloy composite was also observed by a scanning electron microscope equipped with the low energy electron (SLEEM) adaptation aiming at examination of its morphology and orientation relationships to the Al2O3 particles. Owing to its much smaller interaction volume of signal exciting electrons in the target and hence more localized information, together with a favorable combination of secondary (SE) and backscattered (BSE) electron signals, the SLEEM method provided much better readable and detailed images of all particles, their shapes and mutual orientations, in comparison with conventional SE and BSE images at the electron energies usually used in the SEM. MgAl2O4 (spinels) were formed on facets of Al2O3 as small particles, and their shape well corresponded to an octahedron consisting of 8 equiaxial triangles.

Effect of Zn Contents on Microstructure in AZ-Series Magnesium Alloys

2011 ◽  
Vol 409 ◽  
pp. 358-361 ◽  
Author(s):  
Yuichi Narukawa ◽  
Katsumi Watanabe ◽  
Kenji Matsuda ◽  
Tokimasa Kawabata ◽  
Susumu Ikeno
Keyword(s):  
Magnesium Alloys ◽  
Hardness Test ◽  
Alloy System ◽  
Al Alloys ◽  
Age Hardening ◽  
Al Alloy ◽  
Moderate Increase ◽  
Hardening Behavior ◽  
The Matrix ◽  
The Difference

Magnesium alloys containing Al have been used for industrial materials due to their lightweight and recyclability. The Mg-Al alloys are usually used for the industrial production. The Mg-Al alloys are divided into AZ-series alloys with the addition of Zn, and AM-series alloys with the addition of Mn, respectively. The addition of Zn to the Mg-Al alloy system reduces the solid solubility of Al in Mg, increases the amount of precipitate phases after ageing and thus causes a moderate increase in strength. The Mg17Al12phase (γ) is reported as the precipitate formed in the Mg-Al alloys during aging after the solution heat treatment, which is the discontinuous precipitate in the grain boundary and continuous precipitate in the matrix. However, there is few report about the effect of Zn contents on age-hardening behavior and microstructure of AZ-series alloys. The propose of this study is to investigate the difference of the age-hardening behavior and microstructures of AZ-series alloys using hardness test and scanning electron microscopy (SEM) observation.

Precipitation in Al-Li-Cu Alloys

1981 ◽  
Vol 39 ◽  
pp. 44-45
Author(s):  
J. E. O'Neal ◽  
K. K. Sankaran
Keyword(s):  
Electron Microscopy ◽  
Age Hardening ◽  
Precipitation Behavior ◽  
Zone Formation ◽  
Specific Strength ◽  
Hardening Behavior ◽  
Cu Alloys ◽  
High Specific Strength ◽  
Transmission Electron ◽  
Structural Applications

Al-Li-Cu alloys combine high specific strength and high specific modulus and are potential candidates for aircraft structural applications. As part of an effort to optimize Al-Li-Cu alloys for specific applications, precipitation in these alloys was studied for a range of compositions, and the mechanical behavior was correlated with the microstructures.Alloys with nominal compositions of Al-4Cu-2Li-0.2Zr, Al-2.5Cu-2.5Li-0.2Zr, and Al-l.5Cu-2.5Li-0.5Mn were argon-atomized into powder at solidification rates ≈ 103°C/s. Powders were consolidated into bar stock by vacuum pressing and extruding at 400°C. Alloy specimens were solution annealed at 530°C and aged at temperatures up to 250°C, and the resultant precipitation was studied by transmission electron microscopy (TEM).The low-temperature (≲100°C) precipitation behavior of the Al-4Cu-2Li-0.2Zr alloy is a combination of the separate precipitation behaviors of Al-Cu and Al-Li alloys. The age-hardening behavior at these temperatures is characteristic of Guinier-Preston (GP) zone formation, with additional strengthening resulting from the coherent precipitation of δ’ (Al3Li, Ll2 structure), the presence of which is revealed by the selected-area diffraction pattern (SADP) shown in Figure la.

Effects of Fe Addition on Rolling and Age-Hardening Behavior in Al–Si–Mg Alloys

2017 ◽  
Vol 17 (6) ◽  
pp. 4165-4168
Author(s):  
DaeHwan Kim ◽  
JaeHwang Kim ◽  
HyeonTaek Son ◽  
KeeDo Woo
Keyword(s):  
Mg Alloys ◽  
Age Hardening ◽  
Hardening Behavior ◽  
Fe Addition

Local Strengthening of EN AC-44200 Al Alloy with Ceramic Fibers

2015 ◽  
Vol 662 ◽  
pp. 237-240 ◽  
Author(s):  
Krzysztof Naplocha ◽  
Jacek W. Kaczmar ◽  
Jerzy Morgiel
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Composite Materials ◽  
Squeeze Casting ◽  
Porous Ceramic ◽  
Al Alloy ◽  
Ceramic Fibers ◽  
Ceramic Particles ◽  
Casting Technique ◽  
University Of Technology

The applied squeeze casting technique makes possible the local strengthening with ceramic fibers or ceramic particles of elements with Al-alloy matrices. In this paper the elaborated technology of manufacturing of porous ceramic preforms from Saffil fibers is shown and technology of squeeze casting elaborated at Wrocław University of Technology, Chair Foundry, Polymers and Automation described. There were applied the preforms characterized by porosities of 90% and 80%, what after squeeze casting with liquid EN AC - 44200 Al alloy produces the composite materials containing 10 vol. and 20 vol.% of fiber strengthening. The structural phenomena at the interface of strengthened alloy investigated with the optical and electron microscopy are discussed and the mechanical properties of manufactured composite materials are shown.

Thermal Property Evaluation of Chilled Aluminum-Alumina MMC

2015 ◽  
Vol 1101 ◽  
pp. 79-82
Author(s):  
B.C. Suresh ◽  
S.B. Arun
Keyword(s):  
Thermal Expansion ◽  
Composite Materials ◽  
Thermal Property ◽  
Coefficient Of Thermal Expansion ◽  
Matrix Material ◽  
High Strength ◽  
Stir Casting ◽  
Al Alloy ◽  
Industrial Growth ◽  
Property Evaluation

Now a day’s composite materials are taking very important role in industrial growth. Composite materials are widely used in Automobiles, aerospace, submarine and also in other major fields, due to their special characteristics like light weight, high strength, stiffness, corrosion resistance. The determination of Coefficient of Thermal Expansion (CTE) of MMCs is important to aid its usage in high temperature environment as in the case of automobile combustion chamber. In these applications the stability of the composites over a long period of operation is a critical design considerationPresent work deals with the thermal property evaluation of the Al alloy / alumina metal matrix composite developed using the Stir Casting with chilling route technique. LM 26 Al alloy is being selected as the matrix material as it is a potential alloy for automotive piston applications. Al alloy / alumina MMCs was cast under end chilling technique by dispersing the reinforcement from 6 to 12 wt% the steps of 3% to study the variation in its thermal properties. At the same time chill material is also changed (Copper and MS) for different composition of MMCs cast to study the thermal behavior variations. After casting the required MMC, test specimens were prepared as per the standards to conduct thermal conductivity (K) tests and coefficient of thermal expansion (CTE) tests. Above tests were repeated for different composites containing different weight % of dispersed cast using different chills.

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