Synergistic effects of microstructural inhomogeneity and phase-transformation-induced plasticity for ductility improvements in metallic glass composites

doi:10.1016/j.msea.2022.143491

	Synergistic effects of microstructural inhomogeneity and phase-transformation-induced plasticity for ductility improvements in metallic glass composites
	Ma, Huwen 1,4; Zhao, Yanchun 1,4; Wang, Xue 3; Ma, Dong 2; Gao, Yanfei 3
刊名	Materials Science and Engineering A
	2022-08-01
卷号	849
关键词	Austenite Composite materials Ductility Glass Martensite Matrix algebra Metallic glass Neutron diffraction Plasticity Shear flow Shells (structures) Solvents Strain hardening Bulk metallic glass Bulk metallic glass composite Bulk metallic glass composites Ductility enhancement Metallic glass matrix Metastables Second phase Shear band distribution Transformation induced plasticity
ISSN号	0921-5093
DOI	10.1016/j.msea.2022.143491
英文摘要	Recent experiments show some successes in ductility improvements in bulk metallic glass (BMG) composite with metastable crystalline second-phase particles that are capable of phase transformation induced plasticity (TRIP), e.g., austenite to martensite upon straining. The underlying mechanisms are yet to be quantified for a few reasons. First, ductility enhanced by TRIP mechanism in crystalline materials is often credited to the delayed necking due to the enhanced work hardening rate, while BMG composites with such metastable second phases never fail by necking. Second, load partitioning amongst austenite and martensite phases and BMG matrix can be probed by in situ diffraction techniques, but its consequence on preventing or delaying the transition from shear bands to failure has not been revealed. In this work, synergistic effects of microstructural inhomogeneity and TRIP mechanism are quantitatively investigated from micromechanical finite element simulations, using the free-volume theory that is capable of explicitly modeling individual shear bands in the BMG matrix and a strain-driven TRIP model that can be calibrated from available neutron diffraction measurements. For metastable second phases to improve the BMG composite ductility, our parametric studies have found that the strength of the BMG matrix has to be in between the strengths of soft austenite and hard martensite phases, thus leading to the effectively confinement of shear bands near the second phase, the reduction of maximum shear band strain, and therefore the improvement of tensile ductility. Our micromechanical simulations also allow us to identify the roles played by geometric factors such percolation and core-shell or inverse core-shell distributions. © 2022 Elsevier B.V.
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000824491000002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159134]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Songshan Lake Materials Laboratory, Dongguan; 523808, China 3.Department of Materials Science and Engineering, University of Tennessee, Knoxville; TN; 37996, United States; 4.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Ma, Huwen,Zhao, Yanchun,Wang, Xue,et al. Synergistic effects of microstructural inhomogeneity and phase-transformation-induced plasticity for ductility improvements in metallic glass composites[J]. Materials Science and Engineering A,2022,849.
APA	Ma, Huwen,Zhao, Yanchun,Wang, Xue,Ma, Dong,&Gao, Yanfei.(2022).Synergistic effects of microstructural inhomogeneity and phase-transformation-induced plasticity for ductility improvements in metallic glass composites.Materials Science and Engineering A,849.
MLA	Ma, Huwen,et al."Synergistic effects of microstructural inhomogeneity and phase-transformation-induced plasticity for ductility improvements in metallic glass composites".Materials Science and Engineering A 849(2022).