A stir casting system for drawdown of light particles in manufacturing of metal matrix composites

被引：15

作者：

Thanh Tinh Tran ^{[1
]}

Thanh Thinh Vo ^{[1
]}

Cho, Seung Chan ^{[2
]}

Lee, Dong Hyun ^{[2
]}

Hwang, Wook Ryol ^{[1
]}

机构：

[1] Gyeongsang Natl Univ, Res Ctr Aircraft Parts Technol, Sch Mech & Aerosp Engn, Jinju 660701, South Korea

[2] Korea Inst Mat Sci, Chang Won 641831, South Korea

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2018年 / 257卷

基金：

新加坡国家研究基金会;

关键词：

Particle drawdown; Stir casting; Metal matrix composites; Impeller; Particle distribution; SOLIDS; FLOWS; TANKS;

D O I：

10.1016/j.jmatprotec.2018.02.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An extensive set of experiments was carried out to examine the effects of impeller types, impeller locations (submergence), solid volume fraction, and baffle configuration on the drawdown efficiency. Flow simulations in a turbulent regime were also performed to investigate the flow patterns, spatial homogeneity (using the mean age distribution), and particle drawdown mechanisms (using a particle level simulation with the discrete phase model). A combination of two casting impellers (a helical impeller near the top and a radial one near the bottom) with two half -baffles was determined to be the optimal configuration for complete drawdown with enhanced particle distribution, while avoiding air entrainment and lowering the impeller speed. Hydrodynamic mechanisms leading to superior drawdown and dispersion performance of the optimal design are discussed with the formation of free surface swirling, turbulence strength, roles of half baffles and helical/radial impellers on the flow and particle motions.

引用

页码：123 / 131

页数：9

共 21 条

[1] Compocasting of A356-CNT composite
Abbasipour, B.
Niroumand, B.
Vaghefi, S. M. Monir
[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, 2010, 20 (09) : 1561 - 1566
[2] ANSYS Fluent, 2013, THEOR GUID 15 0
[3] Auradi V., 2014, PROCEDIA MAT SCI, V6, P1068, DOI DOI 10.1016/J.MSPRO.2014.07.177
[4] Economical and environmental factors in light alloys automotive applications
Caceres, Carlos H.
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2007, 38A (07): : 1649 - 1662
[5] Davis H.E., 1983, TESTING ENG MAT
[6] Microstructure and Mechanical Properties of MWCNTs Reinforced A356 Aluminum Alloys Cast Nanocomposites Fabricated by Using a Combination of Rheocasting and Squeeze Casting Techniques
Elshalakany, Abou Bakr
Osman, T. A.
Khattab, A.
Azzam, B.
Zaki, M.
[J]. JOURNAL OF NANOMATERIALS, 2014, 2014
[7] Production of natural and synthesized aluminum-based composite materials with the aid of ultrasonic (cavitation) treatment of the melt
Eskin, GI
Eskin, DG
[J]. ULTRASONICS SONOCHEMISTRY, 2003, 10 (4-5) : 297 - 301
[8] Assessment of particle-tracking models for dispersed particle-laden flows implemented in OpenFOAM and ANSYS FLUENT
Greifzu, Franziska
Kratzsch, Christoph
Forgber, Thomas
Lindner, Friederike
Schwarze, Ruediger
[J]. ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS, 2016, 10 (01) : 30 - 43
[9] Metal matrix composites: production by the stir casting method
Hashim, J
Looney, L
Hashmi, MSJ
[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 1999, 93 : 1 - 7
[10] Hemrajani R.R., 2004, HDB IND MIXING SCI P

← 1 2 3 →