Erratum: Exploring the Effects of Intermetallic Particle Size and Spacing on the Corrosion of Mg-Al Alloys Using Model Electrodes [J. Electrochem. Soc.,163, C895 (2016)]

2016 ◽  
Vol 164 (2) ◽  
pp. X1-X1
Author(s):  
L. G. Bland ◽  
N. Birbilis ◽  
J. R. Scully
Keyword(s):  
Particle Size ◽  
Intermetallic Particle ◽  
Al Alloys

Intermetallic Effects on the Ductility of Sintered Aluminium

2008 ◽  
Vol 587-588 ◽  
pp. 380-384
Author(s):  
Jesus Cintas ◽  
José A. Rodríguez ◽  
Francicso Gomez Cuevas ◽  
José M. Gallardo
Keyword(s):  
Heat Treatment ◽  
Particle Size ◽  
Intermetallic Particle ◽  
Quantitative Metallography ◽  
Mechanically Alloyed ◽  
Aluminium Powder ◽  
Attrition Milling ◽  
Different Temperatures ◽  
Alloyed Aluminium ◽  
Milled Powders

Mechanically alloyed aluminium powder was prepared by attrition-milling for 10 hours in the presence of a wax. Milled powders were annealed in vacuum at different temperatures (500, 575, 600, 625 and 650°C). Compacts were consolidated starting from unannealed and from 600°Cannealed powders. Studies by SEM microfractography and quantitative metallography, to investigate the influence of Fe-Al intermetallics on compacts fracture, have been carried out. It is concluded that fracture takes place at regions where the area occupied by the intermetallics is high and intermetallics particles are big. Intermetallic particle size can be controlled by an appropriated heat treatment.

scholarly journals On the Role of Stirring on Microstructure and Ductility of Rheocast Al Alloys

JOM ◽  
2021 ◽  
Author(s):  
Qing Zhang ◽  
Stefan Jonsson ◽  
Anders E. W. Jarfors
Keyword(s):  
Particle Size ◽  
Fracture Surface ◽  
Oxide Films ◽  
Al Alloys ◽  
Combined Effect ◽  
Liquid Feeding ◽  
Oxide Particles ◽  
Large Clusters ◽  
Mg Content

AbstractTwo alloys containing different Mg contents have been used to study the combined effect of stirring and oxidation on microstructure and ductility. The results show that intensive stirring can sufficiently disperse the α-Al particles and enable better liquid feeding during solidification and consequently reduce the porosity. The morphology of the oxides is determined by the amount of both Mg and stirring. With lower Mg content, the oxides present as oxide films, which can be broken up during stirring. In alloy with higher Mg content, the oxides exist as particles with numerous cracks, and the particle size increases slightly after stirring. In the Magsimal 59 alloy, due to the presence of large clusters of pores in the fracture surface, the influence of the small oxide particles on the ductility is negligible. In contrast, in the 42000 alloy, large oxide films on the fracture surface are correlated with the ductility.

Coarse Second Phase Particle Size Distribution of UFG Al Alloys Processed by Severe Plastic Deformation: Effect on Cavitation during Superplastic Deformation

2007 ◽  
Vol 539-543 ◽  
pp. 2859-2864 ◽  
Author(s):  
Kyung Tae Park ◽  
Eui Gil Lee ◽  
Won Jong Nam ◽  
Yong Sin Lee
Keyword(s):  
Plastic Deformation ◽  
Particle Size ◽  
Severe Plastic Deformation ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Superplastic Deformation ◽  
Phase Particle ◽  
Theoretical Models ◽  
Al Alloys ◽  
Second Phase

Two commercial Al alloys having different second phase particle distributions were subjected to severe plastic deformation (SPD) via equal channel angular pressing with or without subsequent cold rolling, and the effect of such SPD on the particle size distribution of the alloys was investigated. The particles larger than ∼ 3 μm were fragmented into several smaller ones by SPD. Contrarily, those smaller than ∼ 3 μm were hardly broken up by SPD but their distribution became more uniform. Along with these findings and the theoretical models for cavity nucleation at second phase particles, the cavitation behavior of ultrafine grained Al alloys during low temperature or high strain rate superplastic deformation was discussed.

Quantitative Phase Field Study on the Precipitation Dynamics of γ′ Phase in Ni-Based Superalloys with Different Concentration

2015 ◽  
Vol 816 ◽  
pp. 655-661 ◽  
Author(s):  
Xing Chao Wu ◽  
Yong Sheng Li ◽  
Zhi Yuan Hou ◽  
Wei Liu ◽  
Hao Jie Mei
Keyword(s):  
Particle Size ◽  
Phase Field ◽  
Volume Fraction ◽  
Nucleation And Growth ◽  
Al Alloys ◽  
Average Particle ◽  
Quantitative Phase ◽  
Average Particle Radius ◽  
Field Simulation ◽  
Lsw Theory

A quantitative phase field simulation was performed on the dynamics evolution of γ′ (L12-Ni3X) phase in Ni-based superalloys, the microstructure, the volume fraction and the particle size distribution (PSD) of γ′ phase for Ni-Al alloys aged at 1173K with the Al concentration c=0.178, 0.180 and 0.182 were investigated, and the results were compared with Lifshitz-Slyozov-Wagner (LSW) theory and Brailsford-Wynblatt (BW) theory. As the Al concentration increases the γ′ phase morphology changed from the separated cuboidal shape to the connected rectangle shape, the nucleation and growth of γ′ phase became faster and the volume fraction of the γ′ phase increased. The average particle radius <r> of γ′ phase and the aging time t has a exponent relationship <r> ~ tn at the coarsening stage with the exponents n=0.313, 0.235 and 0.204 for c=0.178, 0.180 and 0.182, respectively. The peaks of the fitted PSDs are less than the predicted value from the LSW theory and the fitted PSDs are wider than that of LSW predicted, while they are similar to that of the BW theory as the Al concentration increases. The peaks appear at a smaller r/<r> than the predictions of the LSW and BW theories.

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