Location

La Jolla, CA

Start Date

1-1-1993 12:00 AM

Description

Casting is an economical way to manufacture parts. However, castings are rarely used as primary structure in aircraft because of the large safety factors that are required for design allowables. This conservatism in utilization is due, in part, to the traditional limitations in evaluation technology for castings. The safety factor increases the overall weight of the casting, which defeats the cost and weight savings that castings offer. Significant gains in casting utilization are possible by a combination of control of the casting microstructure and proper nondestructive evaluation (NDE) of the product. The presently applied NDE criteria for accepting castings involves a comparison to a qualitative standard and has very little to do with their ability to provide operational service. Computed tomography is an enabling technology whose measurements can be used to quantify the product quality level and improve the consistency of casting manufacture.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

12B

Chapter

Chapter 6: Material Properties

Section

Metals

Pages

1681-1688

DOI

10.1007/978-1-4615-2848-7_215

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

X-Ray CT for Quantitative Casting Material Evaluation

La Jolla, CA

Casting is an economical way to manufacture parts. However, castings are rarely used as primary structure in aircraft because of the large safety factors that are required for design allowables. This conservatism in utilization is due, in part, to the traditional limitations in evaluation technology for castings. The safety factor increases the overall weight of the casting, which defeats the cost and weight savings that castings offer. Significant gains in casting utilization are possible by a combination of control of the casting microstructure and proper nondestructive evaluation (NDE) of the product. The presently applied NDE criteria for accepting castings involves a comparison to a qualitative standard and has very little to do with their ability to provide operational service. Computed tomography is an enabling technology whose measurements can be used to quantify the product quality level and improve the consistency of casting manufacture.