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. O
He O
infiltration S-CONPRI
yields O
200 O
% O
higher O
thermal B-PRO
conductivity E-PRO
than O
Ar S-ENAT
or O
N2 S-MATE
at O
1 O
atm S-CHAR
. O
Powder S-MATE
thermal O
conductivities O
depend O
weakly O
on O
temperature S-PARA
from O
295 O
K S-MATE
to O
470 O
K. O
Gas-enhanced O
thermal B-PRO
conductivity E-PRO
is O
consistent O
with O
an O
effective O
medium O
model S-CONPRI
. O
The O
thermal B-PRO
conductivities E-PRO
of O
five O
metal B-MATE
powders E-MATE
for O
powder B-MANP
bed I-MANP
additive I-MANP
manufacturing E-MANP
( O
Inconel B-MATE
718 E-MATE
, O
17-4 B-MATE
stainless I-MATE
steel E-MATE
, O
Inconel B-MATE
625 E-MATE
, O
Ti-6Al-4V S-MATE
, O
and O
316L B-MATE
stainless I-MATE
steel E-MATE
) O
were O
measured O
using O
the O
transient S-CONPRI
hot B-CHAR
wire I-CHAR
method E-CHAR
. O
These O
measurements O
were O
conducted O
with O
three O
infiltrating B-CONPRI
gases E-CONPRI
( O
argon S-MATE
, O
nitrogen S-MATE