Effect of Ta addition on primary MC carbide in Ti-Nb-Mo-W-alloyed superalloy

被引：3

作者：

Gao, Xiaoyong ^{[1
]}

Zhang, Lifeng ^{[2
]}

机构：

[1] Yanshan Univ, Sch Mech Engn, Qinhuangdao 066004, Hebei, Peoples R China

[2] North China Univ Technol, Sch Mech & Mat Engn, Beijing 100144, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2024年 / 211卷

基金：

中国国家自然科学基金;

关键词：

Superalloy; Primary carbide; Three-dimensional morphology; Thermodynamic calculation; Tantalum; NI-BASED SUPERALLOY; BASE SUPERALLOY; CYCLE FATIGUE; BEHAVIOR; MICROSTRUCTURE; INCLUSIONS; MORPHOLOGY; STABILITY; EVOLUTION; TANTALUM;

D O I：

10.1016/j.matchar.2024.113918

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of Ta addition on characterization of primary MC carbides with regard to their morphology, composition, and size in Ti-Nb-Mo-W-alloyed Ni-based superalloy were investigated. Several tools including automated scanning electron microscopy as well as electrolytic etching technology were used for broad characterization of carbides including three-dimensional morphology. The addition of Ta significantly influences the composition and morphology of primary MC carbides. Large dendrite (Ti,Nb,W,Mo)C carbides were changed to smaller (Ta,Ti,Nb)C carbides. The hardness of both MC primary carbides and the matrix were increased. MC carbides in the studied superalloys were developed dendrite in three-dimensional morphology, which was much larger than that in two-dimensional morphology. The formation mechanism of carbides was clarified by thermodynamic calculation.

引用

页数：7

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