Examinations to the sigma-phase (1.4462)
Treatment : solution annealed
(with heat treating defect)
Magnification : 200 : 1
Etching medium : Groesbeck reagent
- etching period 15 minutes
Sampling / Specification : transverse
Testing result :
ca. 20 % sigma-phase ; the sigma-phase is strongest
etched ,
the ferrite is light and the austenite not etched.
Treatment : solution annealed (with heat
treating defect)
Magnification : 500 : 1
Etching medium : Groesbeck reagent
- etching period 15 minutes
Sampling / Specification : transverse
Testing result :
ca. 20 % sigma-phase ; the sigma-phase is strongest
etched ,
the ferrite is light and the austenite not etched.