Paper Title:
Experimental Study of the Micromechanical Behaviour of Duplex Stainless Steel SAF 2507 and the Influence of Nitrogen Content
  Abstract

The deformation behaviour of four super duplex stainless steels of the grade SAF 2507 (UNS S32750) were studied by X-ray diffraction experiment with in-situ uniaxial tensile load. The steels had different nitrogen contents, between 0.2 and 0.33%, and/or different volume fractions of the ferrite, between 37% and 49%, in balance with austenite. The development of phase-specific stresses under external loading up to over 10% tensile strain was followed. The X-ray diffraction measurements revealed that load partitioning between the phases changed with increasing applied load, as the ferrite and austenite exhibited different deformation hardening behaviours. At the onset of macroscopic yielding and low plastic strains, a load transfer from γ to α occurred due to higher yield strength and strain hardening rate of the ferrite but vice versa at larger plastic strains when the austenite hardened more rapidly than the ferrite. It was also concluded that both the yield and tensile strengthen of the steels increased with increasing nitrogen content due to increased strengthen of the austenite by additional solid solution hardening, whereas a higher volume fraction of austenite contributed to higher tensile strength.

  Info
Periodical
Edited by
Paolo Scardi and Cristy L. Azanza Ricardo
Pages
516-521
DOI
10.4028/www.scientific.net/MSF.681.516
Citation
R. L. Peng, G. C. Chai, T. Stein, T. Manns, S. Johansson, "Experimental Study of the Micromechanical Behaviour of Duplex Stainless Steel SAF 2507 and the Influence of Nitrogen Content", Materials Science Forum, Vol. 681, pp. 516-521, 2011
Online since
March 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Siegfried Kleber, Martin Hafok
Abstract:The investigated super duplex steel belongs to the group of stainless steels which exhibits an austenitic-ferritic microstructure with a...
2998
Authors: Jie Shi, Wen Quan Cao, Han Dong
Abstract:In this study a C-Mn High Strength Low Alloy steel (HSLAs) was processed by quenching and austenite reverted transformation during annealing...
238
Authors: L. Chen, Ping Jiang, Xiao Lei Wu, Mu Xin Yang, Chang Wang, Gang Yang
Abstract:The nanostructure was obtained in a duplex stainless steel (DSS) by means of equal channel angular pressing. The mechanical properties were...
973
Authors: Regita Bendikiene, Rasa Vitkeviciene
Chapter 3: Materials Characterization
Abstract:The paper presents the results of longitudinal investigations of transformation plasticity, kinetic plasticity, elastic-plastic strain and...
131
Authors: Li Hui Wang, Di Tang, Hai Tao Jiang, Ji Bin Liu, Yu Chen
Chapter 3: Steel and Iron Technology
Abstract:Effects of continuous annealing process on microstructure and properties of Si based cold-rolled TRIP Steel were studied. The results show...
472