Effect of Al and Ti addition on the characteristics of oxide inclusions in Ni-based superalloy

被引：0

作者：

Wang, Linzhu ^{[1
]}

Zhang, Yin ^{[1
]}

Chen, Chaoyi ^{[1
]}

Li, Xiang ^{[2
]}

Li, Junqi ^{[1
]}

Yang, Shufeng ^{[3
]}

机构：

[1] Guizhou Univ, Sch Mat & Met, Guiyang 550025, Guizhou, Peoples R China

[2] Guizhou Inst Technol, Dept Mat & Met Engn, Guiyang 550003, Guizhou, Peoples R China

[3] Univ Sci & Technol, Sch Met & Ecol Engn, Beijing 100083, Peoples R China

来源：

METALLURGICAL RESEARCH & TECHNOLOGY | 2023年 / 120卷 / 02期

基金：

美国国家科学基金会;

关键词：

Ni-based alloy; inclusion; characteristic; coarsening; collision; FATIGUE-CRACK INITIATION; GRAIN-SIZE; MICROSTRUCTURE; REMOVAL; GROWTH; MECHANISM; OXYGEN; MODEL;

D O I：

10.1051/metal/2023022

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The characteristics of inclusions have a significant influence on the performance and fatigue life of Ni-based alloy and some cracks usually initiate and propagate from inclusions. High-temperature experiments were carried out at 1823 K to study the effect of Al and Ti addition on the characteristics of oxide inclusions in Ni-based alloy. The size, number, distance, distribution of oxide inclusions and degree of homogeneity in inclusion dispersion in Ni-based alloy with [%Al](i) = 0.3-0.7 and [%Ti](i) = 0.7-1.2 (i represent initial addition of deoxidant) were analyzed systematically. It is found that the oxide inclusions in alloys with [%Al](i) = 0.7, [%Ti](i) = 0.7/1.2 had smaller average size of 2.4 mu m and distributed more homogeneously. The Ostwald ripening theory and collision model were applied to point out the relationships among compositions of Ni-based alloy, behaviors of oxide inclusions and their characteristics under the condition of no external stirring. The calculated results were in good agreement with experimental results. The mechanism on obtaining fine and dispersed oxide inclusions in Ni-based alloy was summarized.

引用

页码：1885 / 1891

页数：11

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