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Microstructure evolution and improved properties of laminated titanium matrix composites with gradient equiaxed grains
Wang Shuai1; Huang LuJun1,2; Jiang Shan1; Zhang Rui1; An Qi1; Sun Yuan3; Geng Lin1,2
Corresponding AuthorHuang LuJun(huanglujun@hit.edu.cn) ; Sun Yuan(yuansun@imr.ac.cn)
2020-11-03
Source PublicationSCIENCE CHINA-TECHNOLOGICAL SCIENCES
ISSN1674-7321
Pages11
AbstractWith the purpose of improving both the strength and ductility, gradient equiaxed grains were successfully achieved in the matrix of the laminated TiB/Ti-TiB/Ti-6.58Al-1.76Zr-1.04V-0.89Mo composite via water quenching (WQ) and thermal compressing deformation. Gradient equiaxed grains varied from approximately 1.0 mu m in TiB/Ti-6.58Al-1.76Zr-1.04V-0.89Mo layer to 5.5 mu m in TiB/Ti layer. The formation of the gradient structure was related to the alloying elements diffusion during the initial sintering process, and the equiaxed shape was constructed by dynamic recrystallization during thermal compressing. WQ treatment before thermal compressing was adopted to obtain fine lamellar structure, which promoted the segmentation of a lamellae, and accelerated the dynamic recrystallization process. Raising the quenching temperature can increase the proportion of equiaxed grains in the composite, which improved both the bending strength and ductility. Compared with the as-sintered specimen, the specimen with gradient equiaxed grains exhibited nearly 30% enhancement in flexural strength (from 1719 to 2218 MPa), and the ultimate bending fracture strain was increased from 7.0% to 17.2%. This significant improvement should be attributed to the coordination deformation by interface gradient grains, the grain refinement strengthening and the good balance between strength and ductility of the recrystallized equiaxed grains.
Keywordtitanium matrix composites laminated structure gradient equiaxed grains microstructure evolution dynamic recrystallization bending properties
Funding OrganizationNational Key R&D Program of China ; Guangdong Province Key Area RD Program ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities
DOI10.1007/s11431-020-1619-7
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2017YFB0703100] ; Guangdong Province Key Area RD Program[2019B010942001] ; National Natural Science Foundation of China[51822103] ; National Natural Science Foundation of China[51801206] ; National Natural Science Foundation of China[51731009] ; Fundamental Research Funds for the Central Universities[HIT.BRETIV.201902]
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Multidisciplinary ; Materials Science, Multidisciplinary
WOS IDWOS:000587109200002
PublisherSCIENCE PRESS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/141277
Collection中国科学院金属研究所
Corresponding AuthorHuang LuJun; Sun Yuan
Affiliation1.Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
2.Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Wang Shuai,Huang LuJun,Jiang Shan,et al. Microstructure evolution and improved properties of laminated titanium matrix composites with gradient equiaxed grains[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2020:11.
APA Wang Shuai.,Huang LuJun.,Jiang Shan.,Zhang Rui.,An Qi.,...&Geng Lin.(2020).Microstructure evolution and improved properties of laminated titanium matrix composites with gradient equiaxed grains.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,11.
MLA Wang Shuai,et al."Microstructure evolution and improved properties of laminated titanium matrix composites with gradient equiaxed grains".SCIENCE CHINA-TECHNOLOGICAL SCIENCES (2020):11.
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