High Temperature Deformation Behavior of High Strength and Toughness Ti-Ni Base Bulk Metallic Glass Composites

doi:10.11900/0412.1961.2018.00256

	High Temperature Deformation Behavior of High Strength and Toughness Ti-Ni Base Bulk Metallic Glass Composites
	Zhao Yanchun 1; Sun Hao 1; Li Chunling 1,2; Jiang Jianlong 1; Mao Ruipeng 1; Kou Shengzhong 1; Li Chunyan 1
刊名	ACTA METALLURGICA SINICA
	2018-12-11
卷号	54 期号:12 页码:1818-1824
关键词	bulk metallic glass composite shape-memory crystalline phase mechanical behavior high temperature deformation rheological property
ISSN号	0412-1961
DOI	10.11900/0412.1961.2018.00256
英文摘要	Room-temperature brittleness and strain-softening during deformation of bulk metallic glasses, and limited processability of shape memory alloys have been stumbling blocks for their advanced functional structural applications. To solve the key scientific problems, a new shape memory bulk metallic glass based composite, through the approach using transformation-induced plasticity (TRIP) effect of shape memory alloys to enhance both ductility and work-hardening capability of metallic glasses, and superplasticity of bulk metallic glass in supercooled liquid region to realize near net forming, was developed in this work. And the Ti-Ni base bulk metallic glass composites (BMGCs) rods were prepared by the levitation suspend melting-water cooled Cu mold process. Microstructure, thermal behavior, mechanical properties and high temperature deformation behavior of the alloy were investigated. The results show that the as-cast alloy microstructure consists of amorphous matrix, undercooled austenite and thermally-induced martensite. Besides, the size of the crystal phase precipitated on the amorphous matrix in-creases from the surface to the inside. The alloy exhibits excellent comprehensive mechanical properties at room temperature. The yield strength, fracture strength and the plastic strain of alloy are up to 1286 MPa, 2256 MPa and 12.2%, respectively. Under compressive loading in the supercooled liquid region, the composite exhibits approximate Newtonian behavior at lower strain rate in higher deformation temperature, and the optimum deformation temperature is T>480 degrees C and the intersection part with supercooled liquid region (SLR). When the temperature is 560 degrees C and the strain rate is 5x10(-4) s(-1), the stress sensitivity index m and the energy dissipation rate Psi are 0.81 and 0.895, respectively. Furthermore, the volume of activation is quantified to characterize the rheological behavior.
资助项目	National Natural Science Foundation of China[516601017] ; Outstanding Youth Funds of Gansu Province[17JR5RA108]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000454455600012
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32280]
专题	材料科学与工程学院机电工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Zhao Yanchun
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Coll Mechanoelect Engn, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Zhao Yanchun,Sun Hao,Li Chunling,et al. High Temperature Deformation Behavior of High Strength and Toughness Ti-Ni Base Bulk Metallic Glass Composites[J]. ACTA METALLURGICA SINICA,2018,54(12):1818-1824.
APA	Zhao Yanchun.,Sun Hao.,Li Chunling.,Jiang Jianlong.,Mao Ruipeng.,...&Li Chunyan.(2018).High Temperature Deformation Behavior of High Strength and Toughness Ti-Ni Base Bulk Metallic Glass Composites.ACTA METALLURGICA SINICA,54(12),1818-1824.
MLA	Zhao Yanchun,et al."High Temperature Deformation Behavior of High Strength and Toughness Ti-Ni Base Bulk Metallic Glass Composites".ACTA METALLURGICA SINICA 54.12(2018):1818-1824.