HR-STEM investigation of atomic lattice defects in different types of η precipitates in creep-age forming Al–Zn–Mg–Cu aluminium alloy

2021 ◽  
Vol 815 ◽  
pp. 141213
Author(s):  
Tsai-Fu Chung ◽  
Yo-Lun Yang ◽  
Cheng-Ling Tai ◽  
Makoto Shiojiri ◽  
Chien-Nan Hsiao ◽  
...  
Keyword(s):  
Aluminium Alloy ◽  
Lattice Defects ◽  
Atomic Lattice ◽  
Different Types ◽  
Creep Age Forming

scholarly journals Numerical simulation for creep age forming of aluminium alloy 7050 saddle-shaped part

2017 ◽  
Vol 207 ◽  
pp. 299-304 ◽  
Author(s):  
Fenggong Lyu ◽  
Xia Huang ◽  
Yuansong Zeng ◽  
Zhusheng Shi ◽  
Mingtao Wang
Keyword(s):  
Numerical Simulation ◽  
Aluminium Alloy ◽  
Shaped Part ◽  
Aluminium Alloy 7050 ◽  
Creep Age Forming

Phase Separation in Reduced LiNbO3

1985 ◽  
Vol 60 ◽  
Author(s):  
H.M. Chan ◽  
Z. Zhuang ◽  
D. M. Smyth
Keyword(s):  
Phase Separation ◽  
Oxygen Deficiency ◽  
Lattice Defects ◽  
Second Phase ◽  
Partial Pressures ◽  
Self Consistent ◽  
Different Types ◽  
Substitutional Impurities

AbstractLiNbO3 tolerates large amounts of disorder in the form of Li2O- deficiency, oxygen-deficiency, and substitutional impurities. These should all result in the formation of a self-consistent set of lattice defects, and there will thus be interactions between the different types of disorder. It is shown that reduction will result in an increase of the Li2O activity in LiNbO3 when it is kinetically hindered from exchanging Li2O with its surroundings. This is in fact the situation for exposure to reducing atmospheres for several hours near 1000°C. Available data on compositions and defect concentrations at 1050°C indicate that reduction should result in separation of a Li20-rich second phase for oxygen partial pressures below 10−17 about 10 atm. Evidence for such phase separation is described.

Profile Correction of a Stretch Formed Aluminium Alloy during Artificial Ageing

2013 ◽  
Vol 549 ◽  
pp. 213-219 ◽  
Author(s):  
Gregor Volk ◽  
Alan G. Leacock ◽  
Desmond Brown
Keyword(s):  
Aluminium Alloy ◽  
Artificial Ageing ◽  
Natural Ageing ◽  
Stretch Forming ◽  
Forming Process ◽  
Heat Treated ◽  
Profile Correction ◽  
Commercial Aluminium ◽  
Springback Reduction ◽  
Creep Age Forming

A method of springback reduction is presented which involves a combination of solution heat treatment, natural ageing, stretch forming and artificial ageing. A commercial aluminium alloy, 2219-O Hi-Form, is solution heat treated and subjected to two pre-form natural ageing periods of one and seven hours before the stretch forming process. Following the forming process an artificial ageing process combined with creep age forming techniques is used. Springback is assessed following the stretch forming and artificial ageing processes. This process is shown to provide a controlled means of correcting the springback following stretch forming.

scholarly journals Material modelling and its application to creep-age forming of aluminium alloy 7B04

2015 ◽  
Vol 2 ◽  
pp. 19 ◽  
Author(s):  
Aaron C.L. Lam ◽  
Zhusheng Shi ◽  
Xia Huang ◽  
Yo-Lun Yang ◽  
Yuansong Zeng ◽  
...  
Keyword(s):  
Aluminium Alloy ◽  
Material Modelling ◽  
Creep Age Forming

Persistent spectral hole-burning in electronic tranisitions of different types of lattice defects

1991 ◽  
Vol 119-121 (1) ◽  
pp. 325-330 ◽  
Author(s):  
T. Attenberger ◽  
I. Sildos ◽  
G. Jones ◽  
U. Bogner ◽  
Max Maier
Keyword(s):  
Lattice Defects ◽  
Hole Burning ◽  
Spectral Hole Burning ◽  
Spectral Hole ◽  
Different Types
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