Grain boundary ductile fracture in precipitation hardened aluminum alloys

AA7050and AA2024 aluminum alloys used in aviation were jointed by friction stir welding, and the tensile properties and fracture surfaces were investigated. The results show that the ultimate strength and the yield limit of welded materials can reach 90% and 75% for AA7075and AA2024 respectively, while the ultimate strength of AA7050/AA2024 FSW can reach 60.5% of AA7050 and 70.8% of AA2024, the yield limit can reach 46.2 % of AA7050 and 75.5% of AA2024. The equiaxial fine grains were found in weld nugget, the coarsen and distorted grains in the thermo-mechanically affected zone, and coarse grains in heat affected zone. The fractures occur at the advancing side between thermo-mechanically affected zone and heat affected zone. Dimples appeared on the fracture surfaces means that the fracture is ductile fracture.

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Aging-dependent coupling effect of multiple precipitates on the ductile fracture of heat-treatable aluminum alloys

Materials Science and Engineering A ◽

10.1016/j.msea.2008.09.012 ◽

2009 ◽

Vol 499 (1-2) ◽

pp. 387-395 ◽

Cited By ~ 12

Author(s):

S.P. Yuan ◽

G. Liu ◽

R.H. Wang ◽

G.-J. Zhang ◽

X. Pu ◽

...

Keyword(s):

Aluminum Alloys ◽

Ductile Fracture ◽

Coupling Effect

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Effects of precipitate morphology on the notch sensitivity of ductile fracture in heat-treatable aluminum alloys

Materials Science and Engineering A ◽

10.1016/j.msea.2010.07.103 ◽

2010 ◽

Vol 527 (27-28) ◽

pp. 7369-7381 ◽

Cited By ~ 7

Author(s):

S.P. Yuan ◽

R.H. Wang ◽

G. Liu ◽

R. Li ◽

J.M. Park ◽

...

Keyword(s):

Aluminum Alloys ◽

Ductile Fracture ◽

Notch Sensitivity ◽

Precipitate Morphology

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Grain boundary segregation and intermetallic precipitation in coarsening resistant nanocrystalline aluminum alloys

Acta Materialia ◽

10.1016/j.actamat.2018.09.038 ◽

2019 ◽

Vol 165 ◽

pp. 698-708 ◽

Cited By ~ 20

Author(s):

A. Devaraj ◽

W. Wang ◽

R. Vemuri ◽

L. Kovarik ◽

X. Jiang ◽

...

Keyword(s):

Aluminum Alloys ◽

Grain Boundary ◽

Boundary Segregation ◽

Grain Boundary Segregation ◽

Nanocrystalline Aluminum

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Effect of solid fraction, grain misorientation and grain boundary energy on solidification cracking in weld of Al–Cu aluminum alloys

Materials Research Express ◽

10.1088/2053-1591/ab20ee ◽

2019 ◽

Vol 6 (8) ◽

pp. 086598 ◽

Cited By ~ 1

Author(s):

F Bodaghi ◽

M Movahedi ◽

A H Kokabi ◽

R Tavakoli

Keyword(s):

Aluminum Alloys ◽

Grain Boundary ◽

Solid Fraction ◽

Boundary Energy ◽

Solidification Cracking ◽

Grain Boundary Energy ◽

Grain Misorientation

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Modeling Recrystallization in Aluminum Using Input from Experimental Observations

Materials Science Forum ◽

10.4028/www.scientific.net/msf.558-559.1057 ◽

2007 ◽

Vol 558-559 ◽

pp. 1057-1061 ◽

Cited By ~ 2

Author(s):

Abhijit P. Brahme ◽

Joseph M. Fridy ◽

Anthony D. Rollett

Keyword(s):

Monte Carlo Simulation ◽

Monte Carlo ◽

Aluminum Alloys ◽

Grain Boundary ◽

Microstructural Evolution ◽

Nearest Neighbor ◽

Electron Back Scatter Diffraction ◽

Effect Of Temperature ◽

Model Predictions ◽

Boundary Properties

A model has been constructed for the microstructural evolution that occurs during the annealing of aluminum alloys. Geometric and crystallographic observations from two orthogonal sections through a polycrystal using automated Electron Back-Scatter Diffraction (EBSD) were used as an input to the computer simulations to create a statistically representative threedimensional model. The microstructure is generated using a voxel-based tessellation technique. Assignment of orientations to the grains is controlled to ensure that both texture and nearest neighbor relationships match the observed distributions. The microstructures thus obtained are allowed to evolve using a Monte-Carlo simulation. Anisotropic grain boundary properties are used in the simulations. Nucleation is done in accordance with experimental observations on the likelihood of occurrences in particular neighborhoods. We will present the effect of temperature on the model predictions.

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