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Journal of Material Sciences
ISSN: 2321-6212
I n t e r n a t i o n a l C o n f e r e n c e o n
Metal, Mining and
Magnetic Materials
N o v e m b e r 0 1 - 0 2 , 2 0 1 8
P a r i s , F r a n c e
Metal and Magnetism 2018
T
he Al-Zn-Mg aluminium alloys subjected to the one step ageing treatments
were recognized as the high mechanical strength aluminium alloys (i.e.,
the tensile strength~550 MPa) in the world. Recently, the A800 (Al-8.9 Zn-
2.1Mg, wt %) aluminium alloys possessing the highest mechanical strength in
aluminium alloys (i.e., the tensile strength~784 MPa) have been successedly
developed. The newly developed heat treatment (i.e., small/large alternative
extrusion cycles) combined with nano-scaled precipitates apparently resulted
the higher mechanical strength. Complementary to the electron backscattered
diffraction (EBSD) investigation on the grain size distribution, Cs-corrected
high-angle annular dark-field scanning transmission electron microscopy (Cs-
corrected HAADF-STEM) extrapolate the contribution of precipitate evolution
on the mechanical properties
Biography
PhD student under Prof. Jer-Ren, Yang’s Lab in Department
of Materials Science and Engineering, National Taiwan
University. The research mainly focus on the exploration and
characterization of microstructural evolution of precipitates
in Al-Cu-Li and Al-Zn-Mg-Cu series aluminium alloys by high-
resolution transmission electron microscopy (HRTEM) and Cs-
corrected high-angle-annular-dark-field scanning-transmission-
electron microscopy (Cs-corrected HRSTEM). Complementary
to micrograph analysis, the quantitative measurement in
precipitates accompanying with variable ageing treatment has
been characterised by small-angle X-ray scattering (SAXS).
f03527003@ntu.edu.twEffect of small/large alternative extrusion cycles and
precipitates on the super high strength of A800 (Al-Zn-Mg-Cu)
aluminium alloys
Tsai Fu Chung
1
, Wayne Hong
2
, Chien Nan Hsiao
3
, Chan Tung
Chen
2
, Manny Lin
2
, Wei Chih Li
4
and Jer Ren Yang
1
1
National Taiwan University, Taiwan
2
Advanced Material Specialty, Inc., Taiwan
3
National Applied Research Lab, Instrument Technology Research Center, Taiwan
4
E A Fischione Instruments Inc, USA
Tsai Fu Chung et al., J Mat. Sci. 2018, Volume:6
DOI: 10.4172/2321-6212-C7-032