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equiaxed O
γ O
distributed O
at O
the O
grain B-CONPRI
boundaries E-CONPRI
; O
the O
component S-MACEQ
with O
55 O
at. O
% O
Al S-MATE
content O
exhibits O
the O
structures O
consists O
of O
equiaxed O
γ O
with O
snowflake-shaped O
α2/γ O
lamellae S-MATE
colonies O
. O
In O
the O
bottom O
region O
, O
all O
components S-MACEQ
exhibit O
the O
coarse O
equiaxed O
α2 O
grains S-CONPRI
with O
γ O
laths O
. O
As S-MATE
the O
Al S-MATE
content O
increases O
, O
the O
α2 O
phase S-CONPRI
decreases O
, O
but O
the O
γ O
phase S-CONPRI
increases O
, O
and O
from O
the O
top O
region O
to O
the O
bottom O
region O
, O
the O
proportion O
of O
the O
α2 O
increases O
by O
about O
52 O
at. O
% O
. O
As S-MATE
the O
Al S-MATE
content O
increases O
, O
the O
hardness S-PRO
decreases O