The Effect of Friction Stir Processing on Bifilms and Structural Quality in A356 Alloy Castings

Friction stir processing (FSP) of cast AM60 magnesium alloy has been studied using the breaking pin method, freezing the microstructure during the process. Strong evidence is seen that partial melting plays a key role in removing the β-Mg17Al12, whereas the manganese rich intermetallics persist during FSP. This is consistent with temperature predictions made using a process model adapted to FSP of AM60 castings that show the eutectic melting point is exceeded.

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Effect of friction stir processing on fatigue behavior of A356 alloy

Scripta Materialia ◽

10.1016/j.scriptamat.2004.04.014 ◽

2004 ◽

Vol 51 (3) ◽

pp. 237-241 ◽

Cited By ~ 140

Author(s):

S SHARMA

Keyword(s):

Friction Stir Processing ◽

Fatigue Behavior ◽

A356 Alloy ◽

Friction Stir

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Friction Stir Processing: Effect on Microstructure and Mechanical Properties in Cast Aluminum Alloys

Encyclopedia of Aluminum and Its Alloys ◽

10.1201/9781351045636-140000347 ◽

2019 ◽

Author(s):

Murat Tiryakioğlu ◽

Nelson Netto

Keyword(s):

Aluminum Alloys ◽

Friction Stir Processing ◽

Quality Index ◽

Structural Quality ◽

Casting Defects ◽

Cast Aluminum ◽

Friction Stir ◽

Index Analysis ◽

Cast Aluminum Alloys ◽

Eutectic Si

Microstructural and mechanical data from the literature of friction stir processed (FSPed) cast aluminum alloys were reanalyzed. Results indicated that friction stir processing (FSP) produced more homogeneous microstructures, with finer eutectic Si particles, grains, and intermetallics. However, a relationship between microstructural measures and process parameters could not be established. Regardless of the resultant microstructure, structural casting defects, i.e., pores and oxide films, were reduced in size or completely eliminated after FSP. Consequently, ductility and fatigue life were drastically improved by FSP. Quality index analysis showed that some FSPed specimens have a higher structural quality than aerospace and premium quality castings, and can be used to determine the intrinsic properties of cast aluminum alloys.

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Analysis of the Homogeneity of Particle Refinement in Friction Stir Processing Al-Si Alloys

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.89-91.85 ◽

2010 ◽

Vol 89-91 ◽

pp. 85-90 ◽

Cited By ~ 3

Author(s):

Chun Y. Chan ◽

Philip B. Prangnell ◽

Simon J. Barnes

Keyword(s):

Friction Stir Processing ◽

Process Zone ◽

Phase Particle ◽

Processing Parameters ◽

Second Phase ◽

Friction Stir ◽

Die Cast ◽

Alloy Castings ◽

Particle Refinement ◽

Dirichlet Tessellation

Friction Stir Processing (FSP) has potential for locally enhancing the properties of Al-Si alloy castings, for demanding applications within the automotive industry, by greatly refining the second phase particle size. In the present study, the homogeneity of particle refinement and second phase spatial distribution within the process zone, as well as the relationship to the processing parameters, were investigated in a gravity die cast Al-Si LM24/A380 alloy, subjected to a range of FSP conditions. Detailed image analysis and the dirichlet tessellation method were used to quantify particle clustering. ‘Stop-action’ experiments were also used to study the process of particle break up, by following the behaviour through the deformation zone surrounding the tool.

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