Hot Deformation Behavior of ATI 718Plus Alloy with Different Microstructures

被引：9

作者：

Liu, Chang ^{[1
]}

Zhang, Jianbo ^{[1
]}

Yang, Yikai ^{[1
]}

Xia, Xingchuan ^{[1
,4
]}

He, Tian ^{[3
]}

Ding, Jian ^{[1
]}

Tang, Ying ^{[1
]}

Zhang, Zan ^{[2
]}

Chen, Xueguang ^{[1
]}

Liu, Yongchang ^{[4
]}

机构：

[1] Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China

[2] Xingtai Univ, Coll Phys & Elect Engn, Xingtai 054001, Peoples R China

[3] Hebei Univ Technol, Sch Sci, Tianjin 300130, Peoples R China

[4] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China

来源：

ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2022年 / 35卷 / 08期

基金：

中国国家自然科学基金;

关键词：

718Plus alloy; Hot deformation; Peak stress; Dynamic recrystallization; Critical strain; NI-BASED SUPERALLOY; DYNAMIC RECRYSTALLIZATION; MECHANISMS; EVOLUTION;

D O I：

10.1007/s40195-021-01361-8

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In this work, the effect of microstructure on hot deformation behavior of ATI 718Plus (hereinafter refers to 718Plus) alloy was studied by isothermal compression test. The results showed that when the strain rate was 0.01-0.1 s(-1) with deformation temperature of 980 and 1030 degrees C, hot deformation behavior was mainly affected by dislocation density. Dislocation density of the air-cooling alloy was larger than that of the furnace-cooling alloy, which makes its critical strain smaller and peak stress higher than that of the furnace-cooling alloy. When the strain rate was 1 s(-1), hot deformation behavior of the alloy was mainly affected by twins and gamma ' phase, and high-density deformation twins in air-cooling alloys resulted in higher critical strain. gamma ' phase exists in furnace-cooling alloy, which makes its peak stress higher than that of air-cooling alloy. 718Plus alloy is sensitive to cooling rate; dislocation and gamma ' phase have obvious effects on its hot deformation behavior.

引用

页码：1383 / 1396

页数：14

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