Changes Observed in the Amount of Defects for Austenitic Stainless Steel
DOI:
https://doi.org/10.15678/ZNUEK.2013.0924.04Keywords:
stainless steel, plastic deformation, crystallographic defects, positron annihilationAbstract
Samples were plastically deformed using a hydraulic press, achieving a reduced thickness of from 2 to 16%. Isochronal cumulative annealing for 1 h at a temperature range from room temperature to 725°C was then performed. After each annealing, the positron measurement was performed using a Doppler broadening spectrometer with a coaxial high purity germanium detector. The 68Ge/ 68Ga positron source was used for Doppler broadening measurements. The aim of the presented investigations is to study the annealing behaviour of deformed stainless steel 1.4301 (EN) in terms of defects detected by positron annihilation methods while closely observing the influence of the reverse transformation of deformation induced martensite on the obtained dependencies.
Downloads
References
Di Schino A., Barteri M., Kenny J.M. [2002], Development of Ultra Fine Grain Structure by Martensitic Reversion in Stainless Steel, „Journal of Materials Science Letters", vol. 21.
Dryzek J. [1997], Wstęp do spektroskopii anihilacji pozytonów w ciele stałym, wyd. 1, Wydawnictwo UJ, Kraków.
Dryzek J., Stegemann T., Cleff B. [1996], Badania warstwy wierzchniej metodą anihilacji pozytonów, Instytut Fizyki Jądrowej im. Henryka Niewodniczańskiego, Kraków.
PN-EN 10020:2003. Definicje i klasyfikacja gatunków stali.
Prowans S. [1977], Materiałoznawstwo, wyd. 1, PWN, Warszawa-Poznań.
Sampark P., Majhi G.K. [2013], Deformation Induced Phase Transformation of 304L Stainless Steel and its Structural Characterization, under the guidance of dr. K Dutta, India.
Santos T.F., Andrade M.S. [2010], Internal Friction on AISI 304 Stainless Steels with Low Tensile Deformations at Temperatures between -50 and 20°C, „Advances in Materials Science and Engineering", vol. 2010.
Skorko M. [1976], Fizyka, PWN, Warszawa.
Suszyńska M. [1990], Wybrane zagadnienia z fizyki defektów sieciowych, PAN-Zakład Narodowy im. Ossolińskich, Wrocław-Warszawa-Kraków.
Tavares S.S.M., Fruchart D., Mirgalia S. [2000], A Magnetic Study of the Reversion of Martensite α' in a 304 Stainless Steel, „Journal of Alloys and Compounds", vol. 307.
Uhlig H.H. [1976], Korozja i jej zapobieganie, WNT, Warszawa.
