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논문 기본 정보

자료유형
학술저널
저자정보
Sang‑Wook Kim (Inha University) Hyeon‑Woo Son (Inha University) Taek‑Kyun Jung (Inha University) Young‑Bum Chun (Korea Atomic Energy Research Institute) Yi‑Hyun Park (ITER Korea) Ji‑Woon Lee (Inha University) Soong‑Keun Hyun (Inha University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.25 No.4
발행연도
2019.1
수록면
888 - 899 (12page)

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초록· 키워드

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The hot deformation behavior of advanced reduced-activation alloy (ARAA) was investigated using hot torsion tests. Thefl ow stress decreased as deformation temperature increased and as strain rate decreased. The fl ow behavior demonstratedthe typical dynamic recrystallization (DRX). Based on the constitutive analysis of peak stress, the activation energy for hotdeformation was found to be 330.3 kJ mol −1 . Peak stress was analyzed as a function of the Zener–Hollomon parameter, andcalculated and experimental values were in good agreement. A DRX kinetic model for ARAA was derived with deformationconditions based on the Avrami-type model. It was confi rmed that the volume fraction of dynamically recrystallized grainsincreased as deformation temperature increased and as strain rate decreased. The necklace structure and grain boundarybulging were observed in the deformed microstructure of ARAA. The suggested DRX mechanism for ARAA during hotworking is discontinuous DRX.

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