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STUDY OF A NEW-TYPE HIGH STRENGTH Ni-BASED SUPERALLOY DZ68 WITH GOOD HOT CORROSION RESISTANCE
Liu Enze1,2; Sun Shunchen1; Tu Ganfeng1; Zheng Zhi2; Ning Likui2; Zhang Lingfeng3
Corresponding AuthorLiu Enze(nzliu@imr.ac.cn)
2009-10-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume45Issue:10Pages:1217-1224
AbstractIn order to meet the requirements of marine gas turbine blade materials, a, new-type directional solidification Ni-based superalloy named DZ68 was developed. The alloy composition was designed by low segregation technology. Its nominal chemical composition (mass fraction, %) is C 0.05, Cr 12.0, Mo 1.0, W 5.0, Co 8.5, Al 5.3, Ti 0.5, Ta 5.0, Re 2.0, B 0.01, and balance is Ni. The microstructures of as-east DZ68 alloy and after heat treatment states were analyzed by OM, SEM and XRD. The tensile, rupture and hot corrosion resistance properties of DZ68 alloy were compared with DZ125 and IN738 alloys. Results show that the microstructure of as-cast DZ68 alloy is composed of gamma, gamma', (gamma+gamma') eutectics, MC type carbides and a few borides. After heat treatment, the microstructure of DZ68 alloy is composed of gamma, gamma' and carbides. The carbides are mainly MC and M(23)C(6). The tensile strength of DZ68 alloy decreases slightly with the increase of temperature, and reaches its minimum value at 700 degrees C. When the temperature is higher than 700 degrees C, the tensile strength increases so evidently that reaches its maximum at once at 760 degrees C, But when the temperature is higher than 760 degrees C its tensile strength decreases obviously. It is well recognized the relationship of the tensile strength of DZ68 alloy with temperature is abnormal, similar to that of its yield strength but opposite to that of its plasticity. The tensile and rupture properties of DZ68 alloy are nearly the same as those of DZ125 alloy and its hot corrosion resistance property is nearly the same as that of IN738 alloy under the same conditions.
KeywordDZ68 alloy tensile property rupture property hot corrosion resistance
Indexed BySCI
Language英语
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000272062800011
PublisherSCIENCE PRESS
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/97982
Collection中国科学院金属研究所
Corresponding AuthorLiu Enze
Affiliation1.Northeastern Univ, Sch Met & Mat, Shenyang 110004, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
3.AVIC Xian Aeroengine Grp Ltd, Xian 710021, Peoples R China
Recommended Citation
GB/T 7714
Liu Enze,Sun Shunchen,Tu Ganfeng,et al. STUDY OF A NEW-TYPE HIGH STRENGTH Ni-BASED SUPERALLOY DZ68 WITH GOOD HOT CORROSION RESISTANCE[J]. ACTA METALLURGICA SINICA,2009,45(10):1217-1224.
APA Liu Enze,Sun Shunchen,Tu Ganfeng,Zheng Zhi,Ning Likui,&Zhang Lingfeng.(2009).STUDY OF A NEW-TYPE HIGH STRENGTH Ni-BASED SUPERALLOY DZ68 WITH GOOD HOT CORROSION RESISTANCE.ACTA METALLURGICA SINICA,45(10),1217-1224.
MLA Liu Enze,et al."STUDY OF A NEW-TYPE HIGH STRENGTH Ni-BASED SUPERALLOY DZ68 WITH GOOD HOT CORROSION RESISTANCE".ACTA METALLURGICA SINICA 45.10(2009):1217-1224.
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