Torn wire at the drawing - 1.7176
Treatment : untreated
Magnification : 6,5 : 1
Etching medium :
Sampling / Specification : place of the abcrack
Testing result :
conical end of the broken wire
Treatment : untreated
Magnification : 100 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : longitudinal
Testing result :
microstructure consist of martensite and bainite
with transverse cracks in the martensite