a	thermal diffusion coefficient
A	Hensel-Spittel equation coefficient
cp	specific heat
d	diameter of test probe
e	Euler’s number
K	number of time steps
m	Hensel-Spittel equation coefficients
np	number of grid space
q	heat flux
r	distance from the axis of the specimen
R	radius of test probe
R2	correlation coefficient
T	temperature
t	time
TAB	the transition temperature from stage A to stage B
Tmeasured	measured temperature
Tp	surface temperature
v	cooling rate
vA	cooling rate in stage A
Subscripts:
i	index of space point
max	maximum value
Superscripts:
k	index of time point
Greek symbols:
α	heat transfer coefficient
β	non-negative coefficient
ε	strain
$\dot{\epsilon }$	strain rate
Δt	time interval
Δr	radius interval
λ	thermal conductivity
ρ	density
σp	flow stress
τ	time