Solidification Modeling and Porosity Control in Aluminum Alloy Castings

1999 ◽  
Author(s):  
Jeffrey R. Shenefelt ◽  
Rogelio Luck ◽  
John T. Berry ◽  
Robert P. Taylor
Keyword(s):  
Aluminum Alloy ◽  
Boundary Conditions ◽  
Hydrogen Evolution ◽  
Thermal Environment ◽  
Shrinkage Porosity ◽  
Commercial Software ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Software Packages ◽  
Alloy Castings

Abstract Commercial software packages enable the thermal environment of shaped castings to be determined provided the boundary conditions are well understood. Criteria functions (CF’s) based on the thermal environment provide a means for estimating shrinkage porosity within a casting. However, the CF’s do not account for gas driven porosity forming within the casting. This paper reviews the CF’s and additional approaches to account for hydrogen evolution in aluminum-copper and aluminum-silicon alloys.

Defects in Aluminum Alloy Castings

2019 ◽  
Author(s):  
John Campbell
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Hydrogen Embrittlement ◽  
Stress Corrosion Cracking ◽  
Tensile Elongation ◽  
Shrinkage Porosity ◽  
Corrosion Cracking ◽  
The Other ◽  
Al Alloy ◽  
Alloy Castings

Most of the major defects in Al alloy castings are the result of entrainment processes. The entrainment of the surface of the liquid creates bifilm defects, and the entrainment of air creates bubbles and bubble trails. Occasionally the entrainment of foreign inclusions, such as sand inclusions, can also be a problem. Bifilms form the initiators of gas porosity, shrinkage porosity, hot tears, and cracks. Since bifilms can be controlled by improved melting and casting techniques, all these defects are controllable. In addition, bifilms control the mechanical properties of castings, particularly tensile elongation, toughness, and fatigue. The other important effects caused by bifilms such as invasive corrosion behavior including pitting, stress corrosion cracking, and possibly hydrogen embrittlement, are beyond the scope of this review.

scholarly journals Evaluation of Cracking Causes of AlSi5Cu3 Alloy Castings

2014 ◽  
Vol 59 (3) ◽  
pp. 1089-1092 ◽  
Author(s):  
Š. Eperješi ◽  
M. Matvija ◽  
ľ. Eperješi ◽  
M. Vojtko
Keyword(s):  
Automotive Industry ◽  
Pressure Casting ◽  
Operating Life ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Heat Treated ◽  
Low Pressure Casting ◽  
Alloy Castings ◽  
Pressure Die Casting

Abstract Recently, the castings made from aluminum-silicon alloys by pressure die casting are increasingly used in the automotive industry. In practice, on these castings are high demands, mainly demands on quality of their structure, operating life and safety ensuring of their utilization. The AlSi5Cu3 alloy castings are widely used for production of car components. After the prescribed tests, the cracks and low mechanical properties have been identified for several castings of this alloy, which were produced by low pressure casting into a metal mould and subsequent they were heat treated. Therefore, analyses of the castings were realized to determine the causes of these defects. Evaluation of structure of the AlSi5Cu3 alloy and causes of failure were the subjects of investigation presented in this article.

REYNOLDS 390 and A390

Alloy Digest ◽  
1971 ◽  
Vol 20 (8) ◽  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
High Hardness ◽  
Heat Treating ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Temperature Performance

Abstract REYNOLDS 390 and A390 are hypereutectic aluminum-silicon alloys having excellent wear resistance coupled with good mechanical properties, high hardness, and low coefficients of expansion. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, and machining. Filing Code: Al-203. Producer or source: Reynolds Metals Company.

ALUMINUM 713.0

Alloy Digest ◽  
1985 ◽  
Vol 34 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Room Temperature ◽  
High Strength ◽  
Heat Treating ◽  
Good Combination ◽  
Casting Alloy ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Permanent Mold Castings ◽  
Aluminum Base

Abstract ALUMINUM 713.0 is an aluminum-base casting alloy that ages at room temperature to provide high-strength sand and permanent-mold castings. It has a good combination of mechanical properties and its corrosion resistance is equivalent to that of the aluminum-silicon alloys. It is dimensionally stable. Among its many uses are housings, machinery parts, fittings, lever arms and brackets. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and compressive and shear strength as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Al-263. Producer or source: Various aluminum companies.

Manufacture of aluminum-alloy castings by fast prototyping

2009 ◽  
Vol 39 (5) ◽  
pp. 394-398
Author(s):  
V. V. Drokina ◽  
V. D. Belov ◽  
V. S. Zolotorevskii
Keyword(s):  
Aluminum Alloy ◽  
Fast Prototyping ◽  
Alloy Castings

Effects of Intensity of Alternating Electromagnetic Field on Microstructure and Property of ZL114A Aluminum Alloy Castings

2013 ◽  
Vol 278-280 ◽  
pp. 429-432
Author(s):  
Qing Song Yan ◽  
Yong Li ◽  
Gang Lu ◽  
Bai Ping Lu ◽  
Bo Wen Xiong ◽  
...  
Keyword(s):  
Grain Size ◽  
Electromagnetic Field ◽  
Aluminum Alloy ◽  
Mechanical Performance ◽  
Great Influence ◽  
Current Intensity ◽  
Alloy Castings

Through analyzing and testing the microstructure and property of ZL114A aluminum alloy castings under the condition of alternating electromagnetic field, the effects of the intensity of alternating electromagnetic field on the microstructure and property of ZL114A aluminum alloy castings are studied. The results showed the intensity of alternating electromagnetic field had a great influence on the microstructure and property of ZL114A aluminum alloy castings. With the increase of the intensity of alternating electromagnetic field, the grain size of ZL114A aluminum alloy was more and more small, under the 10A current intensity, the grain was the finest. Whereas, with the increase of the intensity of alternating electromagnetic field further, the grain is more and more big. Meanwhile, in a certain rang of current intensity, the mechanical performance of ZL114A aluminum alloy had been improved comprehensively, its tensile intensity was improved 10MPa and the elongation was increased by 30%.

Should commercial software packages be used in the classroom?

1988 ◽  
Vol 20 (3) ◽  
pp. 32-33
Author(s):  
Giora Baram ◽  
Frank F. Friedman
Keyword(s):  
Commercial Software ◽  
Software Packages
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