Influence of Substituting W for Nb or Hf on Solidification Behavior of a Typical Co-Ni-Al-W Based Superalloy

doi:10.1007/s40195-024-01749-2

IMR OpenIR

	Influence of Substituting W for Nb or Hf on Solidification Behavior of a Typical Co-Ni-Al-W Based Superalloy
	Zhang, Huifang 1,2; Xie, Jun 1; Li, Qi 1; Wu, Hao 1; Yu, Jinjiang 1; Chai, Hongyu 1; Zhang, Fengjiang 1; Li, Jinguo 1; Zhou, Yizhou 1; Sun, Xiaofeng 1
通讯作者	Xie, Jun(junxie@imr.ac.cn) ; Li, Qi(qli17b@imr.ac.cn)
	2024-07-22
发表期刊	ACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN	1006-7191
页码	14
摘要	Understanding the effects of various elements on solidification behavior is crucial for designing the composition of gamma'-strengthened Co-based superalloys and is fundamental for controlling the as-cast structure and formulating subsequent heat treatment processes. This research investigated the effects of replacing 1 at.% W with 1 at.% Nb or Hf elements on the solidification behavior of Co-Ni-Al-W-based superalloys. The findings revealed that substituting W with Nb and Hf resulted in a notable decrease in both the solidus temperature (TS) and liquidus temperature (TL). Specifically, the substitution of W with Nb lowered TS from 1353 degrees C to 1332 degrees C and TL from 1383 degrees C to 1368 degrees C, while replacing W with Hf decreased TS from 1353 degrees C to 1330 degrees C and TL from 1383 degrees C to 1366 degrees C. Moreover, both Nb and Hf element are positive segregation element, while Nb decreases and Hf increases W segregation, respectively. During the final solidification stage, the substitution of W with Nb resulted in the formation of eutectic (gamma + gamma'), Co3Ta, and a small amount of mu-Co7Nb6 phase, while replacing W with Hf resulted in the formation of the Laves phase and beta-CoAl phase. The solidification paths of the three alloys were confirmed based on the result of differential scanning calorimetry, isothermal solidification experiment and Thermo-calc simulation. These results offer a theoretical basis for the composition design and optimization of heat treatment processes for Co-Ni-Al-W-based superalloys.
关键词	Co-Ni-Al-W-based superalloys Solidification microstructure Segregation Solidification path
资助者	National Key Research and Development Program of China ; National Science and Technology Major Project ; AECC Independent Innovation Special Fund Project ; National Natural Science Foundation of China ; Youth Innovation Promotion Association Project, Chinese Academy of Sciences
DOI	10.1007/s40195-024-01749-2
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2023YFB3712003] ; National Science and Technology Major Project[J2019-VI-0018-0133] ; AECC Independent Innovation Special Fund Project[ZZCX-2022-040] ; National Natural Science Foundation of China[51701212] ; National Natural Science Foundation of China[51771191] ; National Natural Science Foundation of China[51971214] ; Youth Innovation Promotion Association Project, Chinese Academy of Sciences[2020198]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001274308600002
出版者	CHINESE ACAD SCIENCES, INST METAL RESEARCH
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/188482
专题	中国科学院金属研究所
通讯作者	Xie, Jun; Li, Qi
作者单位	1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Huifang,Xie, Jun,Li, Qi,et al. Influence of Substituting W for Nb or Hf on Solidification Behavior of a Typical Co-Ni-Al-W Based Superalloy[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2024:14.
APA	Zhang, Huifang.,Xie, Jun.,Li, Qi.,Wu, Hao.,Yu, Jinjiang.,...&Sun, Xiaofeng.(2024).Influence of Substituting W for Nb or Hf on Solidification Behavior of a Typical Co-Ni-Al-W Based Superalloy.ACTA METALLURGICA SINICA-ENGLISH LETTERS,14.
MLA	Zhang, Huifang,et al."Influence of Substituting W for Nb or Hf on Solidification Behavior of a Typical Co-Ni-Al-W Based Superalloy".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2024):14.