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Effect of Foamed Pattern Density on the Lost Foam Process
Foundry engineering Lost foam Foamed polystyrene patterns
2011/3/11
The study examines the effect of the foamed polystyrene pattern density on the process of making castings by the lost foam technique with emphasis put on the analysis of simulation tests.
Weldability of Copper-bearing Aging Steel
copper-bearing aging steel weldability acicular ferrite
2011/8/4
The weldability of copper-bearing aging steel is evaluated using calculated cracking susceptibility index Pcm, oblique Y-groove cracking test, heat-affected zone (HAZ) maximum hardness measurement, su...
Pressure equipments in the process industries and the newly developing industries usually have extreme sizes and/or are subjected to extreme operating conditions such as high pressure, blast loading, ...
New Inclusion Assessment Method in Aluminum Alloys —Electrochemical Method for Inclusion Assessment (EcMIA)
aluminum alloys inclusion assessment electrochemical parameters
2011/8/4
The existence of inclusion influences the properties of aluminum alloy castings, from which the castings will face scrapping under severe condition. Great efforts on the inclusions in aluminum alloy w...
Atomistic Simulations of the Mechanical Deformation of Irradiation-amorphized Silicon Carbide
silicon carbide irradiation-amorphization molecular dynamics modeling
2011/8/3
Irradiation-induced atomic-scale defects and lattice disorder in Silicon Carbide (SiC) can significantly affect the material’s mechanical properties. Currently there lacks a unified physical model cap...
基于Wheeler等提出的纯扩散相场模型，针对hcp晶系镁合金建立耦合温度场、溶质场和流场的相场模型，研究强制对流作用下镁合金凝固过程中单枝晶和多枝晶的生长行为。结果表明：在流速为17.19 m/s的垂直强制对流作用下，流体逆流侧3个方向的枝晶臂明显比流体顺流侧3个方向的枝晶臂生长得快，逆流方向枝晶臂的稳态生长速度比纯扩散时的增加78.0%，顺流方向枝晶臂的稳态生长速度比纯扩散时的减小53.7%；...
利用一种新的电铸技术——游离粒子辅助摩擦电铸技术进行Ni-Mn合金的电铸试验。研究了工艺参数对Ni-Mn合金电铸层显微硬度和拉伸性能的影响规律。试验结果表明,游离粒子的辅助摩擦作用和电铸层中的锰元素共同影响着电铸层的力学性能。随着阴极旋转速率的提高,电铸层中锰含量不断增加,且游离粒子对电铸层的摩擦、挤压作用随之加强,电铸层的显微硬度和抗拉强度都不断提高;随着电流密度的提高,电铸层中锰含量也不断增加...
Swagelining as a method of trenchless piplines rehabilitation
Engineering polymers Mechanical properties Trenchless renovation
2009/12/14
Purpose: The present study outlines the advantages of using trenchless methods for the rehabilitation of pipelines made of steel, concrete, cast iron etc. The authors describe causes of carrier pipe a...
Evaluation of Al-5Ti-1B and Al-10Sr in LM6 sand castings
Casting Modification Grain refinement
2009/12/14
Purpose: of this paper is to study the separate effects of grain refiner and modifier on the metallurgical properties of LM6 sand castings. The research aims to determine how grain refiner and modifie...
Grooved roll for a high speed twin roll caster
Casting Twin roll caster Grooved roll Roll surface
2009/12/2
Purpose: Purpose of this paper is investigation of the effect of roll-surface on the strip-surface. Improvement of
small cracks on the strip-surface was tried and effect of groove at the roll surface...
Casting of aluminum alloy strip using an unequal diameter twin roll caster
Casting Unequal diameter twin roll caster Strip casting
2009/12/2
Purpose: of this paper is to clear the property and ability of an unequal diameter twin roll caster to cast
commercial size strip. Therefore, 400mm-width strip was cast as first step. Surface-conditi...
Pouring mould during centrifugal casting process
Casting Centrifugal casting process Metal matrix composite
2009/12/1
Purpose: The paper presents the model and the example simulations of the centrifugal casting of metal matrix
composite reinforced with SiC, especially the distribution of the velocity of liquid comp...
The determination of the thickness of composite layer for ball casting
Casting Composite Surfacing alloy layer Computer simulation
2009/12/1
Purpose: In this article the results of thermal simulation of formation composite layer on steel model casting
were presented. The aim of researches was to determine the technological parameters of f...
采用光学金相(OM)、扫描电镜(SEM)、透射电镜(TEM)、X射线衍射(XRD)和织构材料(ODF)分析等研究7050铝合金热轧板在逐级升温固溶过程中微结构与织构的演变。结果表明：在固溶温度不超过490 ℃的条件下，板材中长条形再结晶晶粒平行于轧向分布，固溶板材与热轧板材的织构组态相似，均含有少量{001}<100>织构，晶粒取向主要聚集在β-取向线和α-取向线上；具有{124}<211>和{1...