Heat treatment of natural aging aluminum casting alloys

2006 ◽  
Vol 19 (2) ◽  
pp. 123-129 ◽  
Author(s):  
G. K. Sigworth ◽  
J. Howell ◽  
O. Rios ◽  
M. J. Kaufman
Keyword(s):  
Heat Treatment ◽  
Natural Aging ◽  
Aluminum Casting ◽  
Casting Alloys

scholarly journals Comparison of the Heat Treatment Response of SSM-HPDC 6082 and 6004 Wrought Alloys with A356 and F357 Casting Alloys

2011 ◽  
Vol 690 ◽  
pp. 53-56 ◽  
Author(s):  
Heinrich Möller ◽  
Gonasagren Govender ◽  
Waldo Stumpf
Keyword(s):  
Heat Treatment ◽  
Artificial Aging ◽  
Die Casting ◽  
Natural Aging ◽  
Solid Metal ◽  
Casting Alloys ◽  
Aging Response ◽  
Semi Solid ◽  
Si Content ◽  
Pressure Die Casting

Semi-solid metal high pressure die casting was used to produce plates from traditional wrought Al-Mg-Si alloys 6082 and 6004, as well as from traditional casting Al-Si-Mg alloys A356 and F357. The high Si-content of the casting alloys offer several advantages, including a faster artificial aging response, higher strength for comparable Mg contents and less sensitivity to prior natural aging on peak strength. However, over-aging occurs earlier in the casting alloys than in the wrought alloys.

scholarly journals The Influence of Prior Natural Aging on the Subsequent Artificial Aging Response of Aluminium Alloy A356 with Respective Globular and Dendritic Microstructures

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Heinrich Möller ◽  
Gonasagren Govender ◽  
Pierre Rossouw ◽  
Waldo Stumpf
Keyword(s):  
Heat Treatment ◽  
Metal Forming ◽  
Artificial Aging ◽  
Natural Aging ◽  
Casting Technique ◽  
Casting Alloys ◽  
Aging Response ◽  
Dendritic Microstructures ◽  
The Difference ◽  
Linear Correlations

Alloy A356 is one of the most popular alloys used for semisolid metal forming. The heat treatment cycles that are currently applied to semisolid processed components are mostly those that are in use for dendritic casting alloys. The assumption has been made that these heat treatments are not necessarily the optimum treatments, as the difference in solidification history and microstructure of SSM processed components should be considered. The objective of this study is to determine whether dendritic A356 behaves in a similar way to globular A356 in terms of its response to artificial aging with or without prior natural aging. The results indicate that the differences in microstructures (globular or dendritic) do not have a noteworthy effect on the heat treatment response. It is also shown that strong linear correlations are found between T4 and T6 hardness and wt% Mg of A356, regardless of the casting technique used.

scholarly journals Effect of the AlCr20 Addition on the Microstructure of Secondary AlSi7Mg0.3 Alloy

2014 ◽  
Vol 14 (2) ◽  
pp. 9-12 ◽  
Author(s):  
D. Bolibruchová ◽  
L. Richtárech
Keyword(s):  
Heat Treatment ◽  
Iron Content ◽  
Negative Influence ◽  
Intermetallic Phases ◽  
Casting Defects ◽  
Harmful Impurity ◽  
Aluminum Casting ◽  
Casting Alloys ◽  
Iron Based ◽  
Standard Operations

Abstract This paper deals with influence of chrome addition and heat treatment on segregation of iron based phases in the secondary alloy AlSi7Mg0.3 microstructure by chrome and heat treatment. Iron is the most common and harmful impurity in aluminum casting alloys and has long been associated with an increase of casting defects. In generally, iron is associated with the formation of Fe-rich intermetallic phases. It is impossible to remove iron from melt by standard operations, but it is possible to eliminate its negative influence by addition some other elements that affect the segregation of intermetallics in less harmful type or by heat treatment. Realization of experiments and results of analysis show new view on solubility of iron based phases during melt preparation with higher iron content and influence of chrome as iron corrector of iron based phases.

Grain Refinement of Aluminum Casting Alloys

2007 ◽  
Vol 1 (1) ◽  
pp. 31-40 ◽  
Author(s):  
Geoffrey K. Sigworth ◽  
Timothy A. Kuhn
Keyword(s):  
Grain Refinement ◽  
Aluminum Casting ◽  
Casting Alloys
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