In-Situ Synchrotron Diffraction Studies on Transformation Strain Development in a High-Strength Quenched and Tempered Structural Steelart II. Martensitic Transformation

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• 作者：R. K. Dutta (1) (2)
  R. M. Huizenga (2)
  R. H. Petrov (2) (3)
  M. Amirthalingam (2)
  A. King (4) (5)
  H. Gao (1) (2)
  M. J. M. Hermans (2)
  I. M. Richardson (2)
  
• 刊名：Metallurgical and Materials Transactions A
• 出版年：2014
• 出版时间：January 2014
• 年：2014
• 卷：45
• 期：1
• 页码：230-238
• 全文大小：
• 作者单位：R. K. Dutta (1) (2)
  R. M. Huizenga (2)
  R. H. Petrov (2) (3)
  M. Amirthalingam (2)
  A. King (4) (5)
  H. Gao (1) (2)
  M. J. M. Hermans (2)
  I. M. Richardson (2)
  
  1. Materials innovation Institute M2i, Mekelweg 2, 2628CD, Delft, The Netherlands
  2. Department of Materials Science and Engineering, Delft University of Technology, Mekelweg 2, 2628 CD, Delft, The Netherlands
  3. Department of Materials Science and Engineering, Ghent University, Technologiepark 903, 9052, Ghent, Belgium
  4. European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP 220, 38043, Grenoble Cedex, France
  5. Synchrotron Soleil, lrme des Merisiers, Saint-Aubin, BP 48, 91192, Gif-sur-Yvette Cedex, France
  
• ISSN：1543-1940

文摘

In-situ synchrotron diffraction studies on the kinetics of phase transformation and transformation strain development during bainitic transformation were presented in part I of the current article. In the current article, in-situ phase transformation behavior of a high-strength (830MPa yield stress) quenched and tempered S690QL1 [Fe-0.16C-0.2Si-0.87Mn-0.33Cr-0.21Mo (wt.pct)] structural steel, during continuous cooling and under different mechanical loading conditions to promote martensitic transformation, has been studied. Timeemperatureoad resolved 2D synchrotron diffraction patterns were recorded and used to calculate the phase fractions and lattice parameters of the phases during heating and cooling cycles under different loading conditions. In addition to the thermal expansion behavior, the effects of the applied stress on the elastic strains during the martensitic transformation were calculated. The results show that small tensile stresses applied at the transformation temperature do not change the kinetics of the phase transformation. The start temperature for the martensitic transformation increases with the increasing applied tensile stress. The elastic strains are not affected significantly with the increasing tensile stress. The variant selection during martensitic transformation under small applied loads (in the elastic region) is weak.