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1.
Introduction
It is well known
that
……
In recent
years, some researcheshave been reported
on
……
It is found
that
……
Over the
last decades, some investigationson the hot
deformation behaviors of nickel-based
superalloys have
been
reported……
Wen et al. [29]
identified/found that/investigated/established/dis
cussed/studied
……
be attributed tothe couplingeffect
of
……
Although a
number of studies have been carried out to
investigate
…...
the research
on
……
are
still
limited for
……
The
objective of this study is to systematically
discuss
……
as well
as
……
Meanwhile,the increase of
……
increases
…..and
promotes
……
During
……,
are very
complex
On theone hand
,
…..
are significantly
influencedby
……
On the other hand
,
……
Therefore, understandings
of
….
are very important for
designersof
……
to
improve
…
In
order
to
obtain
…..,
considerable
efforts
have
been
made
on
….
by
a
series
ofexperiments,such
as
…..
Based on
the experimental results, some
……
are proposed
to
……
Based on the
recent researches,Lin and Chen [1]
presented
……
Consideringthe effects of
…..
,
Lin et al. [16] proposeda
revised
…..to describe….
On analysis of the test data, Cui et
al.[38] proposed
…..
to
ensure
…..
Guoet
al. [39] established the
modified
…..
to
describe
….
Considering the coupled effects
of
….. ,
Lin et al.
[40
–
43] proposed
new
….
to
describe
….
In
their proposed
….. , …….
are
presented as functions of
……
Also, some
modified
……..
were established
to predict
…….
In
addition, a number of researchers developed some
…….t
o
predict
…….
Due
to
……, ….
are widely applied
in
…….
The
comprehensiveinvestigations
of
…….
Areparticularly
important due to
…….
Wang et al. [61] studied the effects
of
……on……,
andfound
that
…..
With the
increase of
……., ………
decreases firstly and then increases.
Wen et al. [64]established
…..
to optimize
……,
and found
that
…..
Additionally,
……
Although some studies havebeen
conducted to investigate
……
,
……
are stillnot advanced
enough to account
for
………
In this
study,
…..
are investigated
by…..
2.
Material and
experiments
A
……
was selectedin this study,
and its chemical composition (wt.%) is
: ……
A
…..
with compositions (wt%)
of
…..
was used in this study.
Cylindrical specimens with a diameter
of 8 mm and a height of12 mm were cut down from
the
……
Cylindrical specimens were machined
with a diameterof
…
mm and a
height of
….
mm.
The specimenswere solution
treated
…….
In
addition, grain microstructure was observed
by
…..
Samples
for
…..
were
sliced
along
the
compression
axis
section,
mechanically
polished,and
then chemical
etched for
….
min with a
solution consistof
…….
at
roomtemperature
Fig. 1 shows/
illustrates
…..
From Fig. 1, it can be observed
that
……
In order
to
……
Subsequently…..
The
hot
compression
testswere
conducted
on
Gleeble-3500
thermo-
simulation
machine
underthe
strain rate of
……
and the
deformation temperatureof
……
.
The specimens
were firstly
…… ,
Then, the
specimenswere
……
The stress increaseswith the decrease
of
……
or the
increaseof
…..
.
3.
Results and
discussions
Generally
，
the
……
between the
….
and
…..
is unavoidable during
……
Generally,
……..
can be
predicted by the following equation
Generally,
…..
can
be evaluated through the following
……
equation:
In
order to exclude the effects
of
…..
It is
widely proposed that the effects of
……
on
…..
can be
representedby
…….
In order to obtain the parameters in
Eq. (2), substituting
….
intoEq. (2), and then taking the
logarithm of both sides of Eq. (2)
gives
……
The
values of
….
and
….
can be obtained from the
slopes of
……
The
values of
….
and
…..
can be obtained from the
slope and interceptof
……
According to the above
analysis,
…….
can be evaluated
by the followingequations
…
In the following sections, the effects
of
……on…..
are investigated
In order to obtain the value
of
…… ,
taking the logarithm
of both sides of Eq.
(1)gives
…..
By
liner fitting method,the intercept and slope
of
…..
can be evaluated
as
…..
By trial
and error, it is foundthat
……
Based on the above analysis,
…….
can be summarized
as
……
In order to
validate the
…..
,comparisons
between
…and…
are carried out,
as shown in Fig. 10.
It
can
be
found
that
a
good
agreement
between
the
measured
…..
and
predicted
……
is
obtained.
In order to
furtherconfirm the high prediction accuracy
of
…….
, the correlation
coefficient (R)
and average absolute
relativeerror (AARE) are also evaluated.
From
Fig.
2,
it
is
observed
that
……
first
rapidlyincreases
to
…..
,
and
then
gradually
decreases
…….
The characteristicsof
…..
are related to the
……
between
…..
and
…..
Meanwhile
,……
Thus , ….
remarkably
increases.
It is well known
that
……
Consequently
,……
In addition, Fig. 2 indicates
that
……..