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Grain boundary serration tuning and its effect on hot workability of a wrought superalloy
| hal.structure.identifier | PhD. Program in Prospective Functional Materials Industry, | |
| hal.structure.identifier | High Entropy Materials Center | |
| dc.contributor.author | CHEN, Tso-Wei | |
| hal.structure.identifier | Department of Materials Science and Engineering | |
| dc.contributor.author | WANG, Pei-Te | |
| hal.structure.identifier | Gloria Material Technology Corporation | |
| dc.contributor.author | KANG, Yung-Chang | |
| hal.structure.identifier | S-Tech Corporation | |
| dc.contributor.author | WU, Bo-Cheng | |
| hal.structure.identifier | Department of Materials Science and Engineering | |
| dc.contributor.author | TSOU, Nien-Ti | |
| hal.structure.identifier | Metals and Alloys | |
| dc.contributor.author | GLATZEL, Uwe | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GORSSE, Stéphane | |
| hal.structure.identifier | Department of Materials Science and Engineering | |
| hal.structure.identifier | High Entropy Materials Center | |
| hal.structure.identifier | PhD. Program in Prospective Functional Materials Industry, | |
| dc.contributor.author | YEH, An-Chou | |
| dc.date.issued | 2023 | |
| dc.identifier.issn | 0925-8388 | |
| dc.description.abstractEn | This study aims to elucidate the underlying mechanism of grain boundary serration and investigate its effects on hot workability of U720Li superalloy. Industrial scale as-cast ingots were subjected to heat treatments at 1180 °C followed by different cooling rates (15 °C/s, 0.1 °C/s, 0.02 °C/s and 0.003 °C/s) prior hot deformation. With 15 °C/s fast cooling, samples possessed straight boundaries and fine L12 structured γ’ particles dispersion. When the cooling rate was decreased to 0.1 °C/s and below, continuous and discontinuous precipitation of the γ' phase led to the formations of Type-I and Type-II grain boundary serrations, respectively. Lamellar γ/γ’ behind the mobile grain boundary was observed for Type-II boundary, which exhibited larger degree of undulation than that of Type-I boundary. With increasing fractions of Type-II boundary, the hot formability of U720Li was significantly improved during compression tests at 1000 °C; 70 % reduction ratio (true strain=1.2) could be achieved without crack formation. This work presents a simple process route to improve the hot deformability of U720Li fabricated on an industrial scale. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.title.en | Grain boundary serration tuning and its effect on hot workability of a wrought superalloy | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.jallcom.2023.170620 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of Alloys and Compounds | |
| bordeaux.page | 170620 | |
| bordeaux.volume | 960 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-04112884 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-04112884v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Alloys%20and%20Compounds&rft.date=2023&rft.volume=960&rft.spage=170620&rft.epage=170620&rft.eissn=0925-8388&rft.issn=0925-8388&rft.au=CHEN,%20Tso-Wei&WANG,%20Pei-Te&KANG,%20Yung-Chang&WU,%20Bo-Cheng&TSOU,%20Nien-Ti&rft.genre=article |
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