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3 results on '"Quan Zhan Yang"'

1. Numerical simulation and experimental validation on fabrication of nickel-based superalloy Kagome lattice sandwich structures

Author

Yan-peng Wei, Bo Yu, and Quan-zhan Yang

Subjects
kagome unit cell, lattice structure, fabrication, grain morphology and size, cafe model, Technology, Manufactures, TS1-2301
Abstract

Nickel-based superalloy lattice sandwich structures present higher stiffness, higher strength and higher temperature resistance in comparison with other metals. In this study, the Kagome unit was adopted to design the lattice sandwich structure and ProCAST software was used to simulate the filling and solidification processes of the nickel-based superalloy. Grain morphology and sizes of the nickel-based superalloy lattice sandwich structures were simulated by using of cellular automaton coupled with finite element model (CAFE), and indirect additive manufacture combining with investment casting were carried out to fabricate the nickel-based superalloy lattice sandwich structures. The calculated grain morphology and sizes are in good agreement with the experimental results. The grains are mainly equiaxed with an average size of about 500 μm. The simulated results also show that the superheat of melting and the mold preheated temperature have significant influence on the grain size of the Kagome lattice sandwich structures, lower superheat of melting and mold preheated temperatures are encouraged to obtain the fine grains while assuring the integrity of the Kagome lattice sandwich structures for industrial application.

Published
2020
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2. The Processing and Structure of Steel Matrix Syntactic Foams Prepared by Infiltration Casting

Author

Peng Gao, Bo Yu, Quan Zhan Yang, Yan Peng Wei, and Zhi Quan Miao

Subjects
Materials science, Syntactic foam, 020502 materials, Mechanical Engineering, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Microstructure, Matrix (mathematics), Infiltration (hydrology), 0205 materials engineering, Mechanics of Materials, Casting (metalworking), General Materials Science, Composite material, 0210 nano-technology
Abstract

Metal matrix syntactic foams are consisting of metal matrix and hollow spheres in closely or randomly packed, which own multifunctional properties with lightweight, damping, heat insulation, energy absorption and have a vast application prospect. Steel matrix can extend the potential of syntactic foams as a materials class to several new fields of application. In this paper, the hollow alumina spheres were introduced into the steel matrix by infiltration casting, the minimum diameter of hollow spheres for infiltration is analyzed in theory, the steel matrix syntactic foams were successfully prepared, which contain two different sphere types with average diameter sizes 3.97mm and 4.72mm, and the average densities of syntactic foams were calculated to be 4.39 (spheres occupy 43.7% of the volume) and 3.74 g/cm3 (spheres occupy 52.1% of the volume), respectively. The microstructure characteristics of the steel matrix syntactic foam were analyzed by means of scanning electron microscopy and energy spectrum.

Published
2018

3. Numerical Simulations and Experimental Studies on the Quasi-State Axial Compression Behavior of Steel-Based Porous Materials

Author

Xun Sun, Zhi Quan Miao, Quan Zhan Yang, Jing Chang Cheng, Peng Gao, Yan Peng Wei, and Bo Yu

Subjects
Materials science, Mechanical Engineering, 02 engineering and technology, State (functional analysis), 021001 nanoscience & nanotechnology, Condensed Matter Physics, Finite element method, 020303 mechanical engineering & transports, 0203 mechanical engineering, Mechanics of Materials, Axial compression, General Materials Science, Composite material, 0210 nano-technology, Porous medium
Abstract

As a new type composite material, steel-based porous materials presented the higher stiffness, strength and higher temperature resistance in comparison with the nonferrous metals. In order to realize the free-design of pore structure and free-control of porosity of steel-based porous material, indirect 3D printing technology combined with the investment casting process has been used to fabricate the steel-based porous materials. The finite element method has been carried out to study the relationship between the porosity and the mechanical properties by quasi-static compression simulation, which is consistent with compression test. The modified Gibson-Ashby formula is used to establish the quantitative relationship between porosity and elastic modulus and yield strength of steel-based porous materials based on Kelvin structure.

Published
2018

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