Location

Brunswick, ME

Start Date

1-1-1997 12:00 AM

Description

Aluminum castings can contain pinholes caused by porosity from a number of sources, including the presence of gas or from shrinkage. These pinholes, although normally small in size and number, can greatly influence the properties of the casting, often resulting in the scrapping of the part. While many factors are involved in the formation of porosity in aluminum castings, such as the influences of hydrogen and aluminum oxide (A12O3) on gas-porosity, this study investigates the effects of cooling rate and section thickness. These factors are studied by using a sand cast aluminum bar with different section thicknesses which undergo different cooling rates during casting [1,2].

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

16B

Chapter

Chapter 7: New Inspection Procedures

Section

Techniques for Process Control

Pages

1991-1998

DOI

10.1007/978-1-4615-5947-4_260

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

C-Scan Mapping of Elastic Modulus in a Stepped Aluminum Bar Casting

Brunswick, ME

Aluminum castings can contain pinholes caused by porosity from a number of sources, including the presence of gas or from shrinkage. These pinholes, although normally small in size and number, can greatly influence the properties of the casting, often resulting in the scrapping of the part. While many factors are involved in the formation of porosity in aluminum castings, such as the influences of hydrogen and aluminum oxide (A12O3) on gas-porosity, this study investigates the effects of cooling rate and section thickness. These factors are studied by using a sand cast aluminum bar with different section thicknesses which undergo different cooling rates during casting [1,2].