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The microstructure and mechanical properties of directionally solidified NiAl-15Cr alloy at various temperatures
Zhang, GY; Guo, JT; Zhou, LZ; Li, GS; Ye, HQ
Corresponding AuthorZhang, GY()
2005
Source PublicationPRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5
ISSN0255-5476
Volume475-479Pages:2623-2626
AbstractThe microstructure and tensile mechanical properties of directionally Solidified NiAl-15Cr alloy at various temperatures have been investigated in this paper. The results reveal that the microstructure consists of dendritic beta-NiAl phase, interdendritic gamma/gamma', gamma' phase transient layer and alpha-Cr precipitation in beta-NiAl phase. With the increase of temperature obvious Brittle-Ductile-Transition (BDT) behavior is observed and the BDT temperature (BDTT) is sensitive to initial strain rate. When the initial strain rate increases by two-order magnitude, the BDTT has an approximate 150K increase. In the temperature range of 1123-1373K, the alloy exhibits good tensile plasticity and poor strength comparing with the NiAl/Cr(Mo,Hf) alloy. Superplastic-like deformation behavior with large elongation (exceed 200%) is achieved at 1323K. The balance between strain hardening (by dislocation glide) and strain softening (dynamic recover and recrystallization) is responsible for the large tensile elongation of this alloy.
KeywordNiAl intermetallics microstructure BDT mechanical properties
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000227494703024
PublisherTRANS TECH PUBLICATIONS LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82624
Collection中国科学院金属研究所
Corresponding AuthorZhang, GY
Affiliation1.Chinese Acad Sci, Met Res Inst, Dept Superalloys, Shenyang 110016, Peoples R China
2.Chinese Acad Sci, Met Res Inst, Atom Imaging Solids Lab, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Zhang, GY,Guo, JT,Zhou, LZ,et al. The microstructure and mechanical properties of directionally solidified NiAl-15Cr alloy at various temperatures[J]. PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5,2005,475-479:2623-2626.
APA Zhang, GY,Guo, JT,Zhou, LZ,Li, GS,&Ye, HQ.(2005).The microstructure and mechanical properties of directionally solidified NiAl-15Cr alloy at various temperatures.PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5,475-479,2623-2626.
MLA Zhang, GY,et al."The microstructure and mechanical properties of directionally solidified NiAl-15Cr alloy at various temperatures".PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5 475-479(2005):2623-2626.
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