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Synthesis and Fracture Characteristics of TiB2-TiAl Composites with a Unique Microlaminated Architecture
Cui, Xiping; Zhang, Yuanyuan; Yao, Yao; Ding, Hao; Geng, Lin; Huang, Lujun; Sun, Yuan
2019-12-01
Source PublicationMETALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
ISSN1073-5623
Volume50Issue:12Pages:5853-5865
AbstractMicrostructural evolution of as-rolled (TiB2/Al)-Ti laminates in the process of multistep heat treatments and microstructural characteristics of the resulting TiB2-TiAl composites were investigated in detail by scanning electron microscope (SEM) and transmission electron microscope. The desired TiB2-TiAl composites exhibited a unique microlaminated structure consisting of alternating fully lamellar alpha(2)-Ti3Al/gamma-TiAl layers and TiB2-rich layers. Moreover, the formation mechanism of the microlaminated structure was elucidated. It is noteworthy that the TiB2-TiAl composites showed improved high-temperature tensile properties and room-temperature fracture toughness due to the strengthening effect of TiB2 particles and the structure effect of the unique microlaminated microstructure. In addition, the fracture behavior of the microlaminated TiB2-TiAl composites during the dynamic tensile was characterized by combining use of the three-dimensional X-ray microscope (3D-XRM) and SEM. The results indicated that pores and cracks preferred to initiate in the brittle TiB2-rich layer and showed a typical layered distribution, and then expanded into a nearby fully lamellar alpha(2)/gamma layer and kept propagating through the entire alpha(2)/gamma layer into another TiB2-rich layer, repeatedly, and finally the main crack propagated through all the fully lamellar alpha(2)/gamma layers and TiB2-rich layers, eventually resulting in failure. Thus, the fracture mechanism of the innovative microlaminated TiB2-TiAl composites was proposed.
Indexed BySCI
Language英语
WOS IDWOS:000491424700001
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80692
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Cui, Xiping,Zhang, Yuanyuan,Yao, Yao,et al. Synthesis and Fracture Characteristics of TiB2-TiAl Composites with a Unique Microlaminated Architecture[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2019,50(12):5853-5865.
APA Cui, Xiping.,Zhang, Yuanyuan.,Yao, Yao.,Ding, Hao.,Geng, Lin.,...&Sun, Yuan.(2019).Synthesis and Fracture Characteristics of TiB2-TiAl Composites with a Unique Microlaminated Architecture.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,50(12),5853-5865.
MLA Cui, Xiping,et al."Synthesis and Fracture Characteristics of TiB2-TiAl Composites with a Unique Microlaminated Architecture".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 50.12(2019):5853-5865.
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