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the O
feedstocks S-MATE
. O
However O
, O
it O
is O
hard O
to O
ensure O
the O
two O
different O
wires O
melt S-CONPRI
synchronously O
under O
the O
heat S-CONPRI
of O
one O
single O
arc S-CONPRI
, O
so O
the O
desired O
microstructures S-MATE
with O
γ O
( O
TiAl O
) O
phase S-CONPRI
and O
α2 O
( O
Ti3Al O
) O
phase S-CONPRI
are O
hard O
to O
obtain O
. O
A O
two-wire O
TOP-TIG-based O
additive B-MANP
manufacturing I-MANP
process E-MANP
for O
TiAl O
alloys S-MATE
was O
proposed O
in O
this O
paper O
. O
The O
Ti6Al4V S-MATE
wire O
and O
pure O
Al S-MATE
wire O
were O
used O
as S-MATE
the O
feedstocks S-MATE
. O
The O
Al S-MATE
wire O
was O
fed O
in O
TOP-TIG O
mode O
behind O
the O
molten B-CONPRI
pool E-CONPRI
, O
while O
the O
Ti6Al4V S-MATE
wire O
was O
fed O