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Tensile Behavior of SiC Fiber-Reinforced gamma-TiAl Composites Prepared by Suction Casting
Shen, Yingying1,2; Jia, Qing1; Zhang, Xu1; Liu, Ronghua1; Wang, Yumin1; Cui, Yuyou1; Yang, Rui1
Corresponding AuthorJia, Qing(qjia@imr.ac.cn) ; Yang, Rui(ryang@imr.ac.cn)
2021-01-02
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Pages11
AbstractThe process of preparing SiC fiber-reinforced gamma-TiAl composites by the conventional methods is difficult and complicated due to the high reactivity, high melting point and poor deformability of gamma-TiAl alloys. In this work, suction casting, a promising method for preparing SiCf/TiAl composite, had been attempted. In the process, gamma-TiAl alloy melt was introduced rapidly into a mold within pre-arranged fibers that were coated with additional layer of titanium alloy. This simple method successfully prevented serious reactions between the alloy melt and the fibers which remained intact during the solidification process. The interfacial reaction layer was observed by optical microscopy, scanning electron microscopy (SEM). The interfacial reaction products were identified by transmission electron microscopy (TEM). Tensile tests of the matrix alloy and composites were performed at room temperature and 800 degrees C. The results exhibited that the tensile strength of SiCf/gamma-TiAl composite was higher than that of the matrix alloy at both room temperature and 800 degrees C. At room temperature, tensile strength of SiCf/gamma-TiAl composite was increased by about 7% (50 MPa), whereas a double increase in tensile strength 14% (100 MPa) was obtained at 800 degrees C. The titanium alloy coating on the fiber not only prevented the serious interfacial reaction between the gamma-TiAl alloy melt and the SiC fiber, but also played a role in delaying the propagation of cracks in the matrix to the fiber at 800 degrees C. The fracture mechanism of the composite was analyzed by fracture metallographic analysis.
KeywordSuction casting SiCf/gamma-TiAl composite Interfacial reaction Tensile strength Fracture mechanism
Funding OrganizationInnovation Fund of Institute of Metal Research, Chinese Academy of Sciences
DOI10.1007/s40195-020-01170-5
Indexed BySCI
Language英语
Funding ProjectInnovation Fund of Institute of Metal Research, Chinese Academy of Sciences[2015-ZD03]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000604239800002
PublisherCHINESE ACAD SCIENCES, INST METAL RESEARCH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/158895
Collection中国科学院金属研究所
Corresponding AuthorJia, Qing; Yang, Rui
Affiliation1.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Shen, Yingying,Jia, Qing,Zhang, Xu,et al. Tensile Behavior of SiC Fiber-Reinforced gamma-TiAl Composites Prepared by Suction Casting[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2021:11.
APA Shen, Yingying.,Jia, Qing.,Zhang, Xu.,Liu, Ronghua.,Wang, Yumin.,...&Yang, Rui.(2021).Tensile Behavior of SiC Fiber-Reinforced gamma-TiAl Composites Prepared by Suction Casting.ACTA METALLURGICA SINICA-ENGLISH LETTERS,11.
MLA Shen, Yingying,et al."Tensile Behavior of SiC Fiber-Reinforced gamma-TiAl Composites Prepared by Suction Casting".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2021):11.
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