IMR OpenIR
Effect of Zr on solidification segregation behavior of K417G alloy and its anomalous effect during rapid cooling process
Qi, Feng; Yu, Lianxu; Zhao, Guangdi; Xin, Xin; Zhang, Bin; Sun, Wenru
2020-09-15
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
Volume835
AbstractAlthough Zr is classified as a beneficial element in superalloys, it noticeably increases the solidification segregation, worsens the as cast microstructure and lowers the melting point of the superalloys, but the detailed information about the behavior of Zr during the solidification remains unknown till now. In this paper, some evidences supporting the assumption that a film of Zr formed at the solid/liquid interface during solidification have been found, including the precipitation of ZrC, Zr-2 (SC) and Ni-Zr phases at the grain boundary or eutectic (gamma+ gamma') front, and the concentration of Zr at the crack surface formed at the final stage of the K417G alloy solidification. The Zr-rich film at the solid/liquid interface markedly lowers the solidification rate of K417G alloy, and decreases the content of Al, Ti, Cr and Mo in the dendrite core. As a result, the precipitation of (gamma+ gamma') eutectic is largely increased. Under water quenching conditions, the solidification of the final liquids contains two sequential eutectic reaction, including the (gamma+ gamma') at the external part of the liquid pool and the (gamma + carbide) reaction at the central part of the liquid pool. Zr inhibits the second reaction and increases the crack formation tendency, implying that it would damage the weldability of the alloy. (C) 2020 Elsevier B.V. All rights reserved.
DOI10.1016/j.jallcom.2020.155243
WOS IDWOS:000546685800022
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82529
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Qi, Feng,Yu, Lianxu,Zhao, Guangdi,et al. Effect of Zr on solidification segregation behavior of K417G alloy and its anomalous effect during rapid cooling process[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,835.
APA Qi, Feng,Yu, Lianxu,Zhao, Guangdi,Xin, Xin,Zhang, Bin,&Sun, Wenru.(2020).Effect of Zr on solidification segregation behavior of K417G alloy and its anomalous effect during rapid cooling process.JOURNAL OF ALLOYS AND COMPOUNDS,835.
MLA Qi, Feng,et al."Effect of Zr on solidification segregation behavior of K417G alloy and its anomalous effect during rapid cooling process".JOURNAL OF ALLOYS AND COMPOUNDS 835(2020).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Qi, Feng]'s Articles
[Yu, Lianxu]'s Articles
[Zhao, Guangdi]'s Articles
Baidu academic
Similar articles in Baidu academic
[Qi, Feng]'s Articles
[Yu, Lianxu]'s Articles
[Zhao, Guangdi]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Qi, Feng]'s Articles
[Yu, Lianxu]'s Articles
[Zhao, Guangdi]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.