Results 211 to 220 of about 3,766 (260)

A predictive model for the evolution of the thermal conductance at the casting–die interfaces in high pressure die casting

International Journal of Thermal Sciences, 2010
An analytical model is proposed to predict the time varying thermal conductance at the casting-die interface during solidification of light alloys during High pressure Die Casting. Details of the topography of the interface between the casting and the die are included in the model through the inclusion of solid surface roughness parameters and the mean
A Hamasaiid, G Dour, Tahar Loulou
exaly   +6 more sources

Feeding Mechanisms in High-Pressure Die Castings

Metallurgical and Materials Transactions A, 2010
This work focuses on understanding the feeding behavior during high-pressure die casting (HPDC). The effects of intensification pressure (IP) and gate thickness on the transport of material through the gate during the latter stages of HPDC were investigated using an Al-Si3MgMn alloy.
Otarawanna, S., Laukli, H. I., Gourlay, C. M., Dahle, A. K.   +3 more
openaire   +4 more sources

Advancements in High Pressure Die Casting of Magnesium

Advanced Engineering Materials, 2007
The high pressure die casting (HPDC) process is characterized by rapid die filling and a subsequent rapid cooling of the molten metal. These characteristics are favourable for magnesium die casting alloys. Due to the high cooling rate the microstructure formed reveals a fine dendrite and grain structure, which in turn leads to substantial hardening and
H. Gjestland, H. Westengen
openaire   +1 more source

Heat Treatment of High-Pressure Die Castings

Metallurgical and Materials Transactions A, 2007
High-pressure die-cast Al alloys cannot normally be heated at high temperatures due to the presence of pores containing entrapped gases, which lead to the formation of surface blisters. It has been found that blistering can be avoided by using considerably shorter solution-treatment times and lower temperatures.
R.N. Lumley, R.G. O’Donnell, D.R. Gunasegaram, M. Givord   +3 more
openaire   +1 more source

Gas content in high pressure die castings

Journal of Materials Processing Technology, 2011
This paper presents the results of a quantitative study of the gas level in various types of castings from the high pressure die casting (HPDC) process using a vacuum fusion method. It was found that the major part of the gas was from the air entrapment during cavity filling.
Laihua Wang, Peter Turnley, Gary Savage
openaire   +1 more source

Microstructure formation in high pressure die casting

Transactions of the Indian Institute of Metals, 2009
In order to optimise the high pressure die casting (HPDC) process, more understanding of microstructure and defect formation is essential. This article gives an overview of the key microstructural features and the mechanisms of microstructure formation in this process.
Otarawanna, S., Gourlay, C. M., Laukli, H. I., Dahle, A. K.   +3 more
openaire   +3 more sources

Simulation of High Pressure Die Casting Solidification

Materials Science Forum, 2006
By the help of simulation software it is possible to follow and predict the high pressure die casting process. In the Department of Foundry Engineering at the University of Miskolc, Hungary we use both Finite Element- and Finite Difference programs for simulation.
Dániel Molnár, Jenő Dúl, Richárd Szabó   +2 more
openaire   +1 more source

Solidifying pressure and microstructure of AlSi10Cu3 in die sleeve in high pressure die casting

International Journal of Cast Metals Research, 2010
AbstractThe microstructure and microhardness of AlSi10Cu3 solidified in a die sleeve were studied, and the differential equation of local solidifying pressure was deduced in horizontal cold chamber high pressure die casting. The local solidifying pressure changed, and in the last stage of solidification, porosity and pores were present because of the ...
X. P. Hu, G. Q. Zhao, W. M. Wang
openaire   +1 more source

Microsegregation in High Pressure Die Cast AM70

2016
High pressure die casting (HPDC) is the predominant manufacturing method for magnesium alloy automotive components. Cooling rates during HPDC may reach 300°C/s; however, the phase transformation kinetics in this regime are poorly understood. In this study, a description of microsegregation in HPDC AM70 is obtained by electron probe micro-analysis (EPMA)
T. D. Berman, E. Deda, J. Miao, M. Li, J. E. Allison   +4 more
openaire   +1 more source

Plating of Magnesium High Pressure Die Castings

Transactions of the IMF, 1980
The use of magnesium alloys, with their exceptional low density, good formability, in particular by pressure die casting, can lead to considerable weight savings in structural parts.
openaire   +1 more source