In this paper

for the internal friction data of tantalum with oxygen or nitrogen

curve fitting was made by using generalized Arrhenius relation

and the results were discussed. To obtain a selfinduced ordering temperature

T

C

curve fitting was made with

T

C

replaced with

T

0

in generalized Arrhenius relation. Selfinduced ordering temperature

T

C

preexponential τ

0

and apparent activation free energy

ΔG

were calculated basing on the criteria of the minimum of the standard difference (SD) of curve fitting. For the situation with low concentration of relaxation unit

ΔH

is the interception of plot of

T

0

-

ΔG

where

T

0

is nearby the

T

C

. Then entropy change

ΔS

and factor τ′

0

can be calculated. The resultes are those as following: (1

T

C

is proportionate to the concentration of oxygen or nitrogen. This indicate that the the increase of oxygen or nitrogen in tantalum makes the coupling between oxygen or nitrogen increases

then makes

T

C

increase. (2)With the increase of oxygen or nitrogen in tantalum

T

C

ΔS

which is the contribution of combination entropy

increases

then makes the apparent activation free energy

ΔG

decrease. (3) Factor τ′

0

is almost a constant for tantalum with oxygen. The result is selfconsistent with the condition that there is a same activation enthalpy

ΔH

in it. These indicate that in the concentration range of oxygen in this paper

the relaxation unit is the same individual coupling unit. (4) For the situation of nitrogen concentration less than 1.0%

the relaxation unit is the same individual coupling unit. The relaxation unit changes when the concentration of nitrogen increases more. There may be some relaxation unit pairs with weak coupling in it

which make

ΔS

increase.