Development of a Prediction Model and Process–Microstructure–Property Database on Forging and Heat Treatment of Superalloy 720Li

Nobufumi Ueshima*, Chuya Aoki, Toshio Osada, Satoko Horikoshi, Akira Yanagida, Hideyuki Murakami, Toshiki Ishida, Yoko Yamabe-Mitarai, Katsunari Oikawa, Nobuki Yukawa, Jun Yanagimoto

*この研究の対応する著者

研究成果: Conference contribution

抄録

A process–microstructure–property database on forging and heat treatment of superalloy 720Li was established by high precision large-scale 1500 ton forging simulator and laboratory-scale forging simulator. The database was utilized to determine the parameters of flow stress, microstructure, and strength prediction models. The models were integrated to CAE software to predict process–microstructure–property relationships. In the integrated model, the stress, strain, and temperature distributions and their temporal development are calculated by using flow stress model and thermophysical properties. The calculated stress, strain, and temperature data are inputted into the microstructure model. The microstructure model considers grain growth, recrystallization, and precipitation of γ′ and calculates the temporal evolution of microstructural features. The strength model considers solution, grain boundary, and precipitation strengthening and calculates high-temperature 0.2% tensile proof stress, which is related to creep and low-cycle fatigue properties, from the calculated microstructural features. The integrated model successfully predicted the load, microstructure, and strength distribution of a prototype forging experiment conducted by the Hitachi Metals 6000 ton forging machine. The integrated model is a promising tool to design the forging and heat treatment process of the alloy.

本文言語English
ホスト出版物のタイトルSuperalloys 2020 - Proceedings of the 14th International Symposium on Superalloys
編集者Sammy Tin, Mark Hardy, Justin Clews, Jonathan Cormier, Qiang Feng, John Marcin, Chris O'Brien, Akane Suzuki
出版社Springer Science and Business Media Deutschland GmbH
ページ491-499
ページ数9
ISBN(印刷版)9783030518332
DOI
出版ステータスPublished - 2020
外部発表はい
イベント14th International Symposium on Superalloys, Superalloys 2021 - Seven Springs, United States
継続期間: 2021 9月 122021 9月 16

出版物シリーズ

名前Minerals, Metals and Materials Series
ISSN(印刷版)2367-1181
ISSN(電子版)2367-1696

Conference

Conference14th International Symposium on Superalloys, Superalloys 2021
国/地域United States
CitySeven Springs
Period21/9/1221/9/16

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • エネルギー工学および電力技術
  • 材料力学
  • 金属および合金
  • 材料化学

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