Influence of the grain boundary chemistry on the intergranular corrosion mechanisms of a high-strength Al-Mg-Si alloy

2015 ◽  
Vol 48 (8) ◽  
pp. 750-754 ◽  
Author(s):  
Christian Schnatterer ◽  
Daniela Zander
Keyword(s):  
Grain Boundary ◽  
Intergranular Corrosion ◽  
High Strength ◽  
Corrosion Mechanisms ◽  
Boundary Chemistry

Grain-boundary chemistry and intergranular corrosion in alloy 825

2000 ◽  
Vol 31 (4) ◽  
pp. 1163-1173 ◽  
Author(s):  
Y. -M. Pan ◽  
D. S. Dunn ◽  
G. A. Cragnolino ◽  
N. Sridhar
Keyword(s):  
Grain Boundary ◽  
Intergranular Corrosion ◽  
Boundary Chemistry

scholarly journals The Influence of Stored Energy on Grain Boundary Chemistry and Intergranular Corrosion Development in AA2024-T3 Alloy

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2299 ◽  
Author(s):  
Xinxin Zhang ◽  
Xiaorong Zhou ◽  
Guangyi Cai ◽  
Yang Yu ◽  
Xueqin Lu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Dislocation Density ◽  
Grain Boundary ◽  
Energy Distribution ◽  
Intergranular Corrosion ◽  
Stored Energy ◽  
Transmission Electron ◽  
The Difference ◽  
Boundary Chemistry

Following our previous research, the correlation between the micro-chemistry of grain boundary and the distribution of stored energy in AA2024-T3 alloy is investigated, using the combination of transmission Kikuchi diffraction and transmission electron microscopy. It is found that the difference of dislocation density, namely stored energy, between two neighboring grains significantly affects the micro-chemistry of the grain boundary. Further, it is revealed that intergranular corrosion development in the AA2024-T3 alloy is mainly attributed to the combined effect of grain boundary chemistry and stored energy distribution.

CHARACTERIZATION AND SUSCEPTIBILITY TO INTERGRANULAR CORROSION OF AA2024 ALUMINUM ALLOY

2017 ◽  
Vol 31 (2) ◽  
pp. 7-11
Author(s):  
Vasile Hotea ◽  
Keyword(s):  
Aluminum Alloy ◽  
Grain Boundary ◽  
Intergranular Corrosion ◽  
High Strength ◽  
Alkaline Media ◽  
Entire Surface ◽  
Corrosion Tests ◽  
Strength Alloy

In this work, has been performed the characteristics and susceptibility to intergranular corrosion of high strength alloy of AA2024-T3 in alkaline media. Intergranular corrosion can occur randomly over the entire surface of an alloy, but corrosion is limited to the immediate area of the grain boundary and is often not apparent by simple visualization. It can be an important source of limiting the life of the aircraft body where alloys from the 2xxx series are used, which is why they are systematically subjected to intergranular corrosion tests in dedicated laboratories.

Enhancing the Localized Corrosion Resistance of High Strength 7010 Al-Alloy

2010 ◽  
Vol 138 ◽  
pp. 1-6 ◽  
Author(s):  
M. Bobby Kannan ◽  
V.S. Raja
Keyword(s):  
Heat Treatment ◽  
Corrosion Resistance ◽  
Grain Boundary ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Intergranular Corrosion ◽  
High Strength ◽  
Localized Corrosion ◽  
Al Alloy

This paper brings out the developments on heat-treatment and alloying to improve the stress corrosion cracking (SCC) behavior of 7010 Al-alloy. The role of microstructures including the grain boundary precipitates and recystallized grains and the relation of intergranular corrosion (IGC) on the SCC behavior of 7010 Al-alloy have been discussed.

Effect of Stabilizing Treatment on the Intergranular Corrosion Behavior of High Strength Al-Mg Alloys

2014 ◽  
Vol 794-796 ◽  
pp. 253-258 ◽  
Author(s):  
Chun Yan Meng ◽  
Di Zhang ◽  
Hua Cui ◽  
Ji Shan Zhang ◽  
Lin Zhong Zhuang
Keyword(s):  
Corrosion Resistance ◽  
Grain Boundary ◽  
Intergranular Corrosion ◽  
High Strength ◽  
Mg Alloys ◽  
The Matrix ◽  
Strong Relation ◽  
Mechanical Properties And Corrosion ◽  
Al Mg Alloys ◽  
Intergranular Corrosion Resistance

In order to improve the intergranular corrosion resistance of high strength Al-Mg alloys, the effect of stabilizing treatment was systematically investigated. Microstructure evolutions of Al-Mg alloys after different stabilizing treatments have been studied by scanning electron microscopy and optical microscopy. Mechanical properties and corrosion resistance were measured. It was found that the mass loss of samples after sensitizing treatment decreased with an increase in the stabilizing temperature. It was suggested that the susceptibility to intergranular corrosion for high strength Al-Mg alloys has a strong relation to the stabilizing temperature that modify the morphology and distribution of precipitates. The precipitates continuously precipitated along the grain boundary when the stabilizing temperature was lower than 250°C, corresponding to a poor corrosion resistance. However, the precipitates randomly precipitated in the matrix as globular particles, and discontinuously precipitated at the grain boundary after stabilized at 250°C and 275°C, resulted in an improved intergranular corrosion resistance.

Effect of thermal annealing on grain boundary chemistry of polycrystalline TiBa2Ca2Cu3Oy films

1994 ◽  
Vol 52 ◽  
pp. 968-969
Author(s):  
Z. L. Wang ◽  
C. L. Briant ◽  
J. DeLuca ◽  
A. Goyal ◽  
D. M. Kroeger ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Weak Link ◽  
Zero Field ◽  
Stabilized Zirconia ◽  
Local Texture ◽  
Transmission Electron ◽  
Axis Alignment ◽  
Boundary Chemistry ◽  
Small Misorientation ◽  
Misorientation Angles

Recent studies have shown that spray-pyrolyzed films of the Tl-1223 compound (TlxBa2Ca2Cu3Oy, with 0.7 < × < 0.95) on polycrystalline yttrium stabilized zirconia substrates can be prepared which have critical current density Jc near 105 A/cm2 at 77 K, in zero field. The films are polycrystalline, have excellent c-axis alignment, and show little evidence of weak-link behavior. Transmission electron microscopy (TEM) studies have shown that most grain boundaries have small misorientation angles. It has been found that the films have a nigh degree of local texture indicative of colonies of similarly oriented grains. It is believed that inter-colony conduction is enhanced by a percolative network of small angle boundaries at colony interfaces. It has also been found that Jc is increased by a factor of 4 - 5 after the films were annealed at 600 °C in oxygen. This study is thus carried out to determine the effect on grain boundary chemistry of the heat treatment.

An Experimental Study of Cavity Nucleation During Superplastic Deformation

1990 ◽  
Vol 196 ◽  
Author(s):  
Jiang Xinggang ◽  
Cui Jianzhong ◽  
Ma Longxiang
Keyword(s):  
Grain Boundary ◽  
Superplastic Deformation ◽  
Thermomechanical Processing ◽  
High Stress ◽  
High Strength ◽  
Optical Microscope ◽  
Grain Boundary Sliding ◽  
Cavity Nucleation ◽  
High Stress Concentration ◽  
Voltage Electron

ABSTRACTCavity nucleation during superplastic deformation of a high strength aluminium alloy has been studied using a high voltage electron microscope and an optical microscope. The results show that cavities nucleation is due only to superplastic deformation and not to pre-existing microvoids which may be introduced during thermomechanical processing. The main reason for cavity nucleation is the high stress concentration at discontinuties in the plane of the grain boundary due to grain boundary sliding.

Observations of grain boundary chemistry variations in a boron carbide processed with oxide additives

2018 ◽  
Vol 142 ◽  
pp. 106-110 ◽  
Author(s):  
Kristopher D. Behler ◽  
Christopher J. Marvel ◽  
Jerry C. LaSalvia ◽  
Scott D. Walck ◽  
Martin P. Harmer
Keyword(s):  
Grain Boundary ◽  
Boron Carbide ◽  
Boundary Chemistry
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