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A study of the static recrystallization behaviour of cast Alloy 825 after hot-compressions
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Processing. R&D, AB Sandvik Materials Technology, SE-811 81Sandviken, Sweden..ORCID iD: 0000-0003-0381-5494
R&D, AB Sandvik Materials Technology, SE-811 81Sandviken, Sweden..
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Processing.ORCID iD: 0000-0002-6339-4612
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Processing.
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2019 (English)In: IOP Conference Series: Materials Science and Engineering, ISSN 1757-8981, E-ISSN 1757-899X, Journal of Physics, Vol. 1270Article in journal, Editorial material (Refereed) Published
Abstract [en]

The static recrystallization behaviour of a columnar and equiaxed Alloy 825 material was studied on a Gleeble-3800 thermo-simulator by single-hit compression experiments. Deformation temperatures of 1000-1200 °C, a strain of up to 0.8, a strain rate of 1s-1, and relaxation times of 30, 180, and 300 s were selected as the deformation conditions to investigate the effects of the deformation parameters on the SRX behaviour. Furthermore, the influences of the initial grain structures on the SRX behaviors were studied. The microstructural evolution was studied using optical microscopy and EBSD. The EBSD measurements showed a relaxation time of 95 % for fractional recrystallization grains, 𝑡95, in both structures, was less than 30 seconds at the deformation temperatures 1100 °C and 1200 °C. However, fewer than 95% of recrystallized grains recrystallized when the deformation temperature was lowered to 1000 °C. From the grain-boundary misorientation distribution in statically recrystallized samples, the fraction of high-angle grain boundaries decreased with an increasing deformation temperature from 1000 °C to 1200 °C for a given relaxation time. This was attributed to grain coarsening

Place, publisher, year, edition, pages
2019. Vol. 1270
Keywords [en]
Alloy 825, Static recrystallization, hot compression, Gleeble-3800 thermo simulator
National Category
Metallurgy and Metallic Materials
Research subject
Materials Science and Engineering
Identifiers
URN: urn:nbn:se:kth:diva-258210DOI: 10.1088/1742-6596/1270/1/012023OAI: oai:DiVA.org:kth-258210DiVA, id: diva2:1349884
Conference
7th International Conference on Recrystallization and Grain Growth, Ghent,August 4-9, 2019
Note

QC 20190916

Available from: 2019-09-10 Created: 2019-09-10 Last updated: 2019-09-16Bibliographically approved

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