Manchester Metallurgical Society Seminar entitled “The effect of surface preparation on Materials Performance of structural alloys in Nuclear Environment”
| Starts: | 18:00 5 Feb 2019 |
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| Ends: | 20:00 5 Feb 2019 |
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| What is it: | Seminar |
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| Organiser: | Department of Materials |
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| How much: | Free |
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| Speaker: | Dr. Fabio Scenini |
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Surface machining is often assumed to be detrimental to Stress Corrosion Cracking (SCC) in nuclear power plant components because of localized deformation, high associated hardness, roughness
and tensile residual stresses. However, in our recent work on SCC initiation of austenitic stainless steels in high-temperature water shows that a few microns thick ultrafine-grained layer introduced
by machining improved SCC initiation resistance. Removing the macroscopic machining ridges via grinding decreased the residual tensile stress but led to more extensive cracking. This paradigm
shift demonstrates the dominant effect of the microstructure on the oxidation over the mechanical driving force for SCC. Other examples that goes against the general wisdom of the effect of
surface preparation on materials performance will also be discussed; these include Ni-base alloys used in primary and secondary water of Pressurized Water Reactors (PWRs) as well as stainless
steels susceptible to carburization and creep in Advanced Gas Cooled reactors (AGRs).
Speaker
Dr. Fabio Scenini
Organisation: The University of Manchester
Travel and Contact Information
Find event
C15
MSS Tower
Manchester
