The Ultra-Early Structure Transition of D022 Ni3V During the Precipitation: A Phase-Field Study

被引：0
|
作者：
Wang, Kun [1 ]
Ma, Wenlai [1 ]
Zhang, Yumei [1 ]
Fu, Zhenghua [1 ]
机构：
[1] Shandong Univ Aeronaut, Flying Coll, 391 Huanghe Rd, Binzhou 256600, Shandong, Peoples R China
来源：
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2025年 / 78卷 / 03期
关键词：
Ni3V; D0(22); Structure transition; Phase-filed simulation; STABILITY; EVOLUTION; BOUNDARY; KINETICS; ORDER;
D O I：
10.1007/s12666-024-03506-6
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The D0(22) precipitate is an important strengthening phase of materials applying to turbines of the electric generators and aero-engines. This paper presents the study of ultra-early structure transition process of D0(22) Ni3V during its precipitation by building an atomic-scale phase-field model of A1 to D0(22) . Results reveal that the Ni3V undergoes three stages: nucleation, growth and ordering. Two kinds of variants are generated during the precipitation; the in situ cubic to tetragonal ordering transition of D0(22) roots in an initial matrix cell consisting of four face-centered cubic lattice instead of a cell containing two face-centered cubic lattice; planes of mature D0(22) have different ordering degrees and the calculated degree of order suggests that low aging temperature avails long-range order for the aimed superalloy.
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页数：8
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