Study of decomposition of ferrite in a duplex stainless steel cold worked and aged at 450–500 °C |
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| Authors: | Mats Hättestrand Petter Larsson Guocai Chai Jan-Olof Nilsson Joakim Odqvist |
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| Affiliation: | 1. School of Materials Science and Engineering, University of Science and Technology Beijing, 100083 Beijng, China;2. Department of Materials Science and Engineering, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden |
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| Abstract: | The influence of cold-deformation on ferrite decomposition in duplex stainless steel during heat treatment at 450–500 °C was investigated using micro-hardness measurements and transmission electron microscopy. It was found that cold-deformation can change the mechanism of the α → α + α′ phase separation in the ferrite from nucleation and growth to spinodal decomposition. This finding is discussed in terms of the influence of an increased dislocation density on coherency strains. |
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