PRECIPITACIÓN DE MARTENSITA PRECIPITACIÓN DE MARTENSITA  INDUCIDA POR DEFORMACIÓN.

Authors

Car manufacturers are looking for reducing

emissions and hence cars weight. Austenitic

stainless steels are one of the outstanding

materials able to reduce weight of cars due

to its combination of high strength and

excellent formability. This paper describes

the characterization of grades AISI-304,

AISI-301 LN and AISI-316L by measuring

the strain induced α-martensite content.

Several techniques were compared in order

to determine a correlation curve between

ferritescope measurement results and actual

α-martensite contents. The studied methods

involved X-ray diffraction, ferritoscope and

quantitative optical metallography. The

relationship between the ferritescope results

and actual α-martensite contents measured

with the other techniques was found to be

linear.

The results of this study show that cold

rolling is a suitable method to raise the

material strength, while obtaining a suffi cient

formability.