Friction martensite by a mechanical damage - 1.8519
Treatment : quenched and tempered
Magnification : 50 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse
Testing result :
zone with friction martensite
The defect was aroused by overdrawing
of a mechanical damage
Treatment : quenched and tempered
Magnification : 200 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : transverse
Testing result :
zone with friction martensite
The area with friction martensite shows
a higher hardness than the basic material