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논문 기본 정보

자료유형
학술저널
저자정보
G. Q. Li (Taiyuan University of Science and Technology) Y. W. Hou (Avic Shanxi Hongyuan Aviation Forging Company LTD.) W. L. Hu (Taiyuan University of Science and Technology) J. H. Zhao (Taiyuan University of Science and Technology) W. W. He (Taiyuan University of Science and Technology) K. W. Zhang (Taiyuan University of Science and Technology) L. F. Ma (Taiyuan University of Science and Technology)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.30 No.6
발행연도
2024.6
수록면
1,635 - 1,645 (11page)
DOI
10.1007/s12540-023-01585-6

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초록· 키워드

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To illuminate the variant selection discipline of acicular ferrite (AF) in regard to low-carbon niobium-bearing ferrous alloy(Nb-bearing alloy), isothermal transformation experiments under different cooling rates were carried out nearby the bainitestart transformation temperature, and the crystallographic feature of the variant during AF transformation were characterized,systematically. The influences of cooling rate together with grain shape of parent austenite (PA) on the variant selectionbehaviors were further investigated. Results indicated that the transformation stasis phenomenon was obvious for theNb-bearing alloy at the isothermal transformation temperature of 610 ℃ and cooling rate ranging from 1 to 30 ℃/s. Thedistribution feature of overall variants involved in the complex microstructure could be divided into two categories regardlessof the variant type. One category was characterized by weak distribution at dispersed variant, and the other categorywas distributed following the feature of strong component distribution in local variant in accordance with the statistic. Themorphology and crystallographic orientation (COR) of PA before AF transformation were the predominant factor determiningthe behavior and discipline of AF variant selection. This discipline obtained in this study indicated that it was possibleto understand and control the transformation process of AF from perspectives of microstructure and variant selection.

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