Controlling and Minimizing Blistering during T6 Heat Treating of Semi-Solid Castings

Hong Xing Lu; You Feng He; Stephen P. Midson; Da Quan Li; Qiang Zhu

doi:10.4028/www.scientific.net/SSP.256.192

Paper Titles

Determining True Material Constants of Semisolid Slurries from Rotational Rheometer Data
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Liquid-Solid Microextrusion of Aluminum Alloy
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Microstructure and Mechanical Properties of AIN Particles Reinforced Magnesium Matrix Composites with In Situ Synthesis Process
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Microstructure and Properties of LPSO Phase Reinforced Mg Alloy Produced by Rheocasting
p.186

Controlling and Minimizing Blistering during T6 Heat Treating of Semi-Solid Castings
p.192

Experimental Investigations on the Formation of Rosettes during Shear
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Fabrication of Metal Laminate Composites with Interface Reinforcement by Semi-Solid Sintering
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Failure Behaviors of 2D-C_f/Mg Composites Fabricated by Liquid-Solid Extrusion Following Vacuum Pressure Infiltration
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Filling, Feeding and Defect Formation of Thick-Walled AlSi7Mg0.3 Semi-Solid Castings
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HomeSolid State PhenomenaSolid State Phenomena Vol. 256Controlling and Minimizing Blistering during T6...

Controlling and Minimizing Blistering during T6 Heat Treating of Semi-Solid Castings

Abstract:

Surface blistering during T6 heat treating is an artifact that is essentially unique to high pressure casting processes such as semi-solid casting and die casting. It is believed that the blistering originates from subsurface defects present in the castings. When the castings are exposed to elevated temperatures during solution heat treatment, the strength of the aluminum is reduced, and the defects expand to deform the surfaces of the castings. There are three potential sources for the subsurface defects - entrapped air, die lubricant or shot sleeve lubricant.This paper will report on a study to determine the origin of the defects present in the castings that produce the blisters. Along with attempting to separate the influence of air and the two types of lubricants on blister formation, the study will also examine the impact of a number of process parameters on blistering.

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Semi-Solid Processing of Alloys and Composites XIV

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Solid State Phenomena (Volume 256)

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192-198

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https://doi.org/10.4028/www.scientific.net/SSP.256.192

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Online since:

September 2016

Authors:

Hong Xing Lu, You Feng He, Stephen P. Midson*, Da Quan Li, Qiang Zhu

Keywords:

Blister, Lubricants, Semisolid Casting, T6 Heat Treatment

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