Chapter Mathematical Modeling II: Liquid-State Processing Operations

2009 ◽  
pp. 267-342
Keyword(s):  
Mathematical Modeling ◽  
Liquid State ◽  
State Processing

Aluminium Metal Matrix Composite – An Insight into Solid State and Liquid State Processes

2015 ◽  
Vol 766-767 ◽  
pp. 234-239 ◽  
Author(s):  
K.R. Padmavathi ◽  
R. Ramakrishnan ◽  
K. Palanikumar
Keyword(s):  
Solid State ◽  
Ball Milling ◽  
Liquid State ◽  
Metal Matrix ◽  
Coefficient Of Thermal Expansion ◽  
Stir Casting ◽  
Processing Methods ◽  
Uniform Dispersion ◽  
Aluminium Metal ◽  
State Processing

Aluminium metal matrix composites (AMMCs) are being considered as a group of superior material for its lightness, strength, high specific modulus, low coefficient of thermal expansion and good wear resistance properties. Solid state and liquid state processing methods are used to fabricate AMMCs. Achieving a uniform distribution of reinforcement within the matrix is one such challenge, which affects directly on the properties and quality of composite material. Powder metallurgy route, one of the solid state processing methods can be effectively used to get uniform dispersion of reinforcements with aluminium metal matrix. This paper presents the summary of the ball milling and stir casting processes to fabricate the AMMCs and its applications. Major issues like ball milling time, dispersion of reinforcements, grain size, the stirring time and speed are discussed. Also the effect of different reinforcement for AMMCs on the mechanical properties is discussed in detail.

scholarly journals Rheological characteristics of steel in continuous roll casting-rolling

2021 ◽  
Vol 5 (3) ◽  
Author(s):  
O.V. Kholiavik ◽  
Alexey Nogovitsyn ◽  
Alexey Kravchuk ◽  
Alexey Samoylenko ◽  
Ruslan Boris
Keyword(s):  
Mathematical Modeling ◽  
Continuous Casting ◽  
Rheological Properties ◽  
Liquid State ◽  
Thin Sheet ◽  
Efficient Technology ◽  
Research Results ◽  
Roll Casting ◽  
Liquid States ◽  
Solid Liquid

Problems. In the process of obtaining a strip in a casting and rolling device, the question arises of combining the process of hot rolling of the solidified material and the process of crystallization of the liquid melt. This makes it possible to implement an efficient technology for producing thin-sheet products. Purpose of the study. Determination of rational parameters for performing mathematical modeling of material behavior during roll casting requires clearly defined recommendations. The material for the rolling process is steel. The starting material was used in solid, solid-liquid and liquid states. Implementation technique. The analysis of the properties of steel was carried out on the basis of the results of experiments obtained at the Physico-Technological Institute of Metals and Alloys of the National Academy of Sciences of Ukraine. To analyze the rheological properties of steel, the dependences of the yield stress for alloyed and carbon steels were used in a certain temperature range. The selected temperature range includes solidus and solid-liquid state of steel, located above 0.8 melting point. Research results. Based on the research results, the analysis of the rheological properties of steel in solid, solid-liquid and liquid states during continuous casting-rolling on rolls was carried out. The use of the obtained dependencies makes it possible to perform mathematical modeling of the deformation and hydrodynamics of the material during continuous casting-rolling of steel strips using roll casting-rolling devices. Conclusions. The constructed dependences, together with studies of the viscosity of steel in the liquid state and the resistance of steel to deformation in the solid state, most fully describe the rheological properties of steels during casting-deformation processes. The obtained dependences will make it possible to implement an ultra-efficient technology for producing thin-sheet rolled products.

scholarly journals Manufacturing of Al-TiB 2 Nanocomposites by Flux-Assisted Liquid State Processing

2017 ◽  
Vol 10 ◽  
pp. 531-535 ◽  
Author(s):  
Abdolreza Javadi ◽  
Chezheng Cao ◽  
Xiaochun Li
Keyword(s):  
Liquid State ◽  
State Processing

Synthesis of Zr-Based Glassy Alloy Foams

2007 ◽  
Vol 26-28 ◽  
pp. 739-742
Author(s):  
A.K. Prasada Rao ◽  
Yoon S. Oh ◽  
Nack J. Kim
Keyword(s):  
Liquid State ◽  
Glassy Alloy ◽  
Metal Foams ◽  
Amorphous Metal ◽  
Infiltration Technique ◽  
Copper Mould ◽  
State Processing

The present basically concerns with the synthesis of foamy structured amorphous Zrbased alloy, Zr41.2Ti13.8Cu12.5Ni10.0Be22.5 (Vit-1), by liquid state processing. In this method, melt was injected in to the evacuated interstitial voids of the NaCl crystals placed in a copper mould. The casting has been subsequently washed with a jet of water to ensure the removal of NaCl entrapped in the casting, thus resulting in a porous structured casting. It shows the possibility of synthesizing amorphous metal foams with large dimensions using salt infiltration technique.

Semi-Solid High Pressure Die Casting of Metal Matrix Composites Produced by Liquid State Processing

2012 ◽  
Vol 192-193 ◽  
pp. 61-65 ◽  
Author(s):  
Lilian Ivanchev ◽  
Sigqibo Templeton Camagu ◽  
Gonasagren Govender
Keyword(s):  
High Pressure ◽  
Solid State ◽  
Metal Matrix Composites ◽  
Liquid State ◽  
Metal Matrix ◽  
Die Casting ◽  
Matrix Composites ◽  
Semi Solid ◽  
Pressure Die Casting ◽  
State Processing

There are two main technologies for manufacturing of particulate reinforced metal matrix composites (MMC), solid state and liquid state processing. The great challenge of producing cast metal matrix composites is to prevent agglomeration of particulates. This tendency is more pronounced with decreasing the particulate size to fine micro- and nano size. A method for producing MMC was successfully implemented for mixing hybrid, nano and low micron sized, reinforcing particles in an aluminium alloy matrix. The hybrid SiC particles were produced by milling 3µm to 5µm SiC particles to a particle size range between 2.5µm and 150 nm. The hybrid particles were mixed with A356 aluminium alloy under combined magneto-hydrodynamic (MHD) and mechanical stirring. The composite was then transferred to a High Pressure Die Casting (HPDC) machine in the semi-solid state. The micron size particles were found to be predominantly in the intergranular eutectic while the nano-particles were predominantly in the primary α-Al grains. Increased ultimate tensile strength, yield strength and hardness were achieved for the new cast metal matrix hybrid component (MMHC) alloy.

Review on Manufacturing of Metal Foams

2021 ◽  
Vol 16 ◽  
pp. 1-8
Author(s):  
Koon Tatt Tan
Keyword(s):  
Solid State ◽  
Liquid State ◽  
Manufacturing Process ◽  
Liquid Metals ◽  
Physical And Mechanical Properties ◽  
Metal Foams ◽  
Polymer Precursor ◽  
The Common ◽  
Metal Properties ◽  
State Processing

Metal foams possess excellent physical and mechanical properties. This paper reviews the common manufacturing process of metal foams. Various ways used to produce metal foams based on metal properties are described. The manufacturing process follows four primary routes: liquid state, solid state, ion or vapour processing. Liquid-state processing produces porosity to liquid or semi-liquid metals, and solid-state foaming produces metal foams with metal powder as starting material. For ion and vapour processing methods, metals are electro-deposited onto a polymer precursor. The polymer precursor is removed by chemical or heat treatment to produce metal foams. The advantages and limitations of each manufacturing process are also described.

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