Synthesis and Fracture Characteristics of TiB2-TiAl Composites with a Unique Microlaminated Architecture

doi:10.1007/s11661-019-05475-8

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	Synthesis and Fracture Characteristics of TiB2-TiAl Composites with a Unique Microlaminated Architecture
	Cui, Xiping 1; Zhang, Yuanyuan 1; Yao, Yao 1; Ding, Hao 1; Geng, Lin 1; Huang, Lujun 1; Sun, Yuan 2
刊名	METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
	2019-10-18
页码	13
ISSN号	1073-5623
DOI	10.1007/s11661-019-05475-8
通讯作者	Cui, Xiping(cuixiping@hit.edu.cn)
英文摘要	Microstructural 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.
资助项目	National Nature Science Foundation of China[51771064] ; National Nature Science Foundation of China[51971079] ; National Nature Science Foundation of China[51401068]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000491424700001
资助机构	National Nature Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/135632]
专题	金属研究所_中国科学院金属研究所
通讯作者	Cui, Xiping
作者单位	1.Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China 2.Chinese Acad Sci, IMR, Dept Superalloys, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 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,2019:13.
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,13.
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 (2019):13.