P对IN718合金热变形行为的影响

doi:10.11896/cldb.25030218

材料导报

2026, Vol. 40

Issue (5): 25030218-7 https://doi.org/10.11896/cldb.25030218

金属与金属基复合材料

P对IN718合金热变形行为的影响

吕文龙^1,2, 贾丹^1,2,*, 张安文³, 李绍伟^1,2, 赵书伟⁴, 信昕^1,2, 刘恩泽^1,2

1 中国科学技术大学材料科学与工程学院,沈阳 110016;
2 中国科学院金属研究所,沈阳 110016;
3 无锡华天燃气轮机有限公司,江苏无锡 214000;
4 沈阳工业大学材料科学与工程学院,沈阳110870

Influence of Phosphorus on Hot Deformation of IN718 Alloy

LYU Wenlong^1,2, JIA Dan^1,2,*, ZHANG Anwen³, LI Shaowei^1,2, ZHAO Shuwei⁴, XIN Xin^1,2, LIU Enze^1,2

1 School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China;
2 Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
3 Wuxi Huatian Gas Turbine Co.,Ltd., Wuxi 214000, Jiangsu, China;
4 School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China

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摘要对不同P含量IN718合金在变形温度920~1 000 ℃和应变速率5×10^-4~10^-2 s^-1进行拉伸实验,采用SEM、EBSD、TEM等表征手段,研究了P对IN718合金热变形过程中动态再结晶规律与微观组织演变的影响。结果表明,P的加入改变热变形过程中δ相的析出数量和形貌,进而影响动态再结晶进程。当变形温度满足δ相析出时,P通过减少δ相析出数量,抑制δ相长大,促进再结晶晶粒形核,加快动态再结晶进程。当变形温度升高至无δ相析出时,P偏聚在晶界附近,以固溶拖曳的方式抑制晶界的迁移,阻碍动态再结晶晶粒形核与长大,降低动态再结晶分数。

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关键词: P IN718合金拉伸动态再结晶 δ相

Abstract: The hot deformation behaviors of two kinds of IN718 alloys with varying P contents were studied by tensile tests under the deformation tempe-rature range of 920—1 000 ℃ and strain rate range of 5×10^-4—10^-2 s^-1. The effects of P on microstructure evolution and dynamic recrystallization behaviors were characterized by means of SEM, EBSD and TEM. The results indicate that the addition of P significantly alters both the quantity and morphology of δ-phase during hot deformation, thereby affecting dynamic recrystallization. At deformation temperatures within the δ-phase precipitation range, the addition of P reduces the amount of δ-phase and suppresses its growth, which promotes the nucleation of dynamically recrystallized grains. However, when the deformation temperature increases to the level where δ-phase precipitation no longer occurs, P tends to segregate at grain boundaries. Therefore, the segregation of P atoms could inhibit grain boundary migration through solid-solution dragging effects, thereby obstructing the nucleation and growth of dynamically recrystallized grains and consequently reducing the dynamic recrystallization fraction.

Key words: phosphorus IN718 alloy tensile dynamic recrystallization δ-phase

出版日期: 2026-03-10 发布日期: 2026-03-10

ZTFLH:

TG113

通讯作者: ^*贾丹,博士,中国科学院金属研究所副研究员、硕士研究生导师。目前主要从事变形高温合金成分设计优化、组织性能调控等方面的研究。djia@imr.ac.cn

作者简介: 吕文龙,中国科学技术大学材料科学与工程学院硕士研究生,在贾丹副研究员的指导下主要从事变形高温合金变形行为与组织演变研究。

引用本文:

吕文龙, 贾丹, 张安文, 李绍伟, 赵书伟, 信昕, 刘恩泽. P对IN718合金热变形行为的影响[J]. 材料导报, 2026, 40(5): 25030218-7.
LYU Wenlong, JIA Dan, ZHANG Anwen, LI Shaowei, ZHAO Shuwei, XIN Xin, LIU Enze. Influence of Phosphorus on Hot Deformation of IN718 Alloy. Materials Reports, 2026, 40(5): 25030218-7.

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https://www.mater-rep.com/CN/10.11896/cldb.25030218 或 https://www.mater-rep.com/CN/Y2026/V40/I5/25030218

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