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Dispersoids and gamma ' precipitates in an ultrafine grained Rene 88DT-5vol.% Y2O3 alloy with outstanding thermal stability
Xia, T; Yang, C; Zeng, W; Xie, YH; Zhang, YW; Zhang, DL; Zhu, GL; Shu, D; Lavernia, EJ
2018
Source PublicationMATERIALS CHARACTERIZATION
ISSN1044-5803
Volume141Pages:139-147
Subtype期刊论文
AbstractWe report on an ultrafine-grained (UFG) Rene 88DT-5voL%Y2O3 alloy with a high thermal stability fabricated through high energy mechanical milling and thermomechanical powder consolidation. The as-extruded sample consists of an ultrafine grained gamma matrix with an average size of 122 nm with Y4Al2O9 nanoparticles (average size: 12.6 nm) and TiN particles (size about 150 nm) being dispersed in the matrix. The UFG microstructure of the alloy showed an outstanding thermal stability with the average grain size only increasing slightly from 122 to 145 nm after holding at 1120 degrees C (0.85T(m), where T-m is the solidus temperature of the alloy in Kelvin scale) for 2 h and subsequently holding at 760 degrees C for 16 h. Due to the consumption of gamma' forming elements, Ti and Al, by the formation of the Y4Al2O9 and TiN dispersoids, the content of gamma' precipitates in the microstructure of the heat treated sample is significantly reduced, as confirmed by experimentation and calculation using the JMatPro software. Additionally, the size of gamma' precipitates also sharply decreased to 20-30 nm in the heat treated UFG Rene 88DT-5voL%Y2O3 alloy, in contrast to a size of 100-150 nm in the Y2O3-free base alloy under the same heat treatment condition.
KeywordSevere Plastic-deformation Ni-based Alloy Oxide-dispersion Strengthened Superalloys Mechanical-properties Powder-metallurgy Nickel Microstructure Ma6000 Creep
DOI10.1016/j.matchar.2018.04.027
Indexed BySCI
Language英语
WOS IDWOS:000435428100015
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/28975
Collection中科院上海应用物理研究所2011-2018年
Affiliation1.Xia, T
2.Yang, C
3.Zeng, W
4.Xie, YH
5.Zhang, YW
6.Zhang, DL
7.Zhu, GL
8.Shu, D
9.Lavernia, EJ
Recommended Citation
GB/T 7714
Xia, T,Yang, C,Zeng, W,et al. Dispersoids and gamma ' precipitates in an ultrafine grained Rene 88DT-5vol.% Y2O3 alloy with outstanding thermal stability[J]. MATERIALS CHARACTERIZATION,2018,141:139-147.
APA Xia, T.,Yang, C.,Zeng, W.,Xie, YH.,Zhang, YW.,...&Lavernia, EJ.(2018).Dispersoids and gamma ' precipitates in an ultrafine grained Rene 88DT-5vol.% Y2O3 alloy with outstanding thermal stability.MATERIALS CHARACTERIZATION,141,139-147.
MLA Xia, T,et al."Dispersoids and gamma ' precipitates in an ultrafine grained Rene 88DT-5vol.% Y2O3 alloy with outstanding thermal stability".MATERIALS CHARACTERIZATION 141(2018):139-147.
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