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Duplex stainless steels are a family of alloys with a two-phase microstructure consisting of both austenitic and ferritic phases. They offer excellent mechanical properties, corrosion resistance, and toughness compared to other types of stainless steel. However, duplex stainless steel can be susceptible to a phenomenon known as 475 °C (887 °F) embrittlement or duplex stainless steel age hardening, which is a type of aging process that causes loss of plasticity in duplex stainless steel when it is heated in the range of 250 to 550 °C. At this temperature range, spontaneous phase separation of the ferrite phase into iron-rich and chromium-rich nanophases occurs, with no change in the mechanical properties of the austenite phase. This type of embrittlement is due to precipitation hardening, which makes the material become brittle and prone to cracking.
References
- 1 2 3 4 5 Varano, Cameron (2020). "Grace Burke: Show Me the Data". Microscopy Today. 28 (6): 50–52. doi: 10.1017/S1551929520001510 . ISSN 1551-9295. S2CID 230653432.
- ↑ "MSE Colloquium: Grace Burke, Developing a Mechanistic Understanding of Irradiation Embrittlement of RPV Steels and Welds". Materials Science and Engineering. 2012-08-31. Retrieved 2022-03-14.
- ↑ "New Director for the Materials Performance Centre". The University of Manchester. Retrieved 2022-03-14.
- ↑ "President's Award of the MIcroAnalysis Society | Research Explorer | The University of Manchester". www.research.manchester.ac.uk. Retrieved 2022-03-14.
- ↑ "2018 M. Grace Burke". Microanalysis Society. 2018-11-16. Retrieved 2022-03-14.
- ↑ "Council". www.rms.org.uk. Retrieved 2022-03-14.
- ↑ "Henry Clifton Sorby Award | Research Explorer | The University of Manchester". www.research.manchester.ac.uk. Retrieved 2022-03-14.
- ↑ Labmate, International. "Prestigious Award Presented to RMS President Prof Grace Burke". Labmate Online. Retrieved 2022-03-14.
- ↑ "Henri Coriou Award Winners for outstanding contributions to corrosion science and engineering in the nuclear field" (PDF).
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