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Influence of Ru on Solidification Behavior, Microstructure and Hardness of Re-free Ni-based Equiaxed Superalloys with High Cr Content
Guan, Yingshuang; Liu, Enze; Guan, Xiurong; Zheng, Zhi; nzliu@mir.ac.cn; guan7551@sina.com
2016
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume32Issue:3Pages:271-281
AbstractThe effect of Ru addition on solidification behavior, microstructure and hardness of Re-free Ni-based equiaxed superalloys with high Cr content has been investigated. With the increase of Ru, the solidus temperature of the alloys and the gamma' solvus temperature decreased, respectively. However, the liquidus temperatures of the alloys had no obvious change. The microstructure of the as-cast alloys was mainly composed of gamma,gamma', gamma/gamma' eutectic and MC carbides. The gamma/gamma' eutectic was completely dissolved after the heat treatment. The morphology of gamma' was more cuboidal in heat-treated alloys with increasing Ru. Furthermore, the volume fraction of gamma' in the as-cast and heat-treated alloys diminished upon the increase of Ru. It was noted that Ru addition changed the segregation behaviors of Cr and Mo in the alloys from positive segregation element to negative segregation element and promotes the segregation degree of W. As the Ru content increased, the magnitude of segregation of the positive segregation elements Ta and Ti increased accordingly. Meanwhile, the magnitude of Al segregation decreased and Ru tended to segregate in the dendrite core. In addition, the hardness of the alloys improved and their porosity reduced with increasing amount of Ru. Copyright (C) 2015, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited. All rights reserved.
description.department[guan, yingshuang ; guan, xiurong] shenyang ligong univ, sch environm & chem engn, shenyang 110159, peoples r china ; [guan, yingshuang ; liu, enze ; zheng, zhi] chinese acad sci, inst met res, superalloys div, shenyang 110016, peoples r china
KeywordRu Ni-based Equiaxed Superalloy Microstructure Segregation Hardness
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74918
Collection中国科学院金属研究所
Corresponding Authornzliu@mir.ac.cn; guan7551@sina.com
Recommended Citation
GB/T 7714
Guan, Yingshuang,Liu, Enze,Guan, Xiurong,et al. Influence of Ru on Solidification Behavior, Microstructure and Hardness of Re-free Ni-based Equiaxed Superalloys with High Cr Content[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2016,32(3):271-281.
APA Guan, Yingshuang,Liu, Enze,Guan, Xiurong,Zheng, Zhi,nzliu@mir.ac.cn,&guan7551@sina.com.(2016).Influence of Ru on Solidification Behavior, Microstructure and Hardness of Re-free Ni-based Equiaxed Superalloys with High Cr Content.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,32(3),271-281.
MLA Guan, Yingshuang,et al."Influence of Ru on Solidification Behavior, Microstructure and Hardness of Re-free Ni-based Equiaxed Superalloys with High Cr Content".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 32.3(2016):271-281.
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