Effects of Boron and Zirconium on Grain Boundary Morphology and Creep Resistance in Nickel-Based Superalloy

被引：19

作者：

Kang, Byung-Il ^{[1
]}

Han, Cheon-Ha ^{[1
]}

Shin, Yong-Kwan ^{[1
]}

Youn, Jeong-IL ^{[1
]}

Kim, Young-Jig ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, 2066 Seobu Ro, Suwon 16419, Gyeonggi Do, South Korea

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2019年 / 28卷 / 11期

关键词：

boron; boro-carbide precipitates; nickel-based superalloy; creep resistance; grain boundary; zirconium; CARBIDES; MICROSTRUCTURE;

D O I：

10.1007/s11665-019-04419-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Grain boundaries (GBs) in nickel-based superalloys have a significant influence on the creep resistance of these alloys. In this study, the trace elements of boron and zirconium were added to the newly designed LESS 1 (Ni-22Cr-20Co-2W-2Nb-1.5Al-1.5Ti-0.03C) alloy, and their effects on the GB precipitation behaviors of carbides were observed. The combined addition of boron and zirconium generates a continuous film structure containing MC carbides and M-23(C, B)(6)-type boro-carbides, as well as a grain boundary gamma '. Based on the change in microstructure, rupture time is significantly increased. According to the observed microstructures and simulation results, it was confirmed that boron forms M-23(C, B)(6)-type boro-carbides and zirconium appears to stabilize MC carbides at GBs.

引用

页码：7025 / 7035

页数：11

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