Location

Thousand Oaks, CA

Start Date

1974 12:00 AM

Description

The classic technique for a nondestructive measurement of residual stress is the use of X-ray diffraction. It is really quite an old method. There is a classic paper by Norton and Rosenthal written back in 1943. The method was used during the second World War, I believe, in connection with the study of welded structures in ships. A more or less portable piece of equipment was built even in those days. The method did not come, as far as I know, into very widespread use. I think I now understand this better after hearing yesterday•s talks. It seems clear that a nondestructive testing or evaluation method must be cheap, quick and simple; the early X-ray techniques were none of those. They depended on the use of photographic film. The exposure had to be made; the film had to be developed. In many cases it had to be measured with a microdensitometer. It required a rather skilled person to do it, so it was not really a very attractive procedure.

Book Title

Proceedings of the Interdisciplinary Workshop For Quantitative Flaw Definition

Chapter

5. Residual Stress and Related Properties

Pages

450-462

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Physical Origins of Residual Stress and Present Physical Techniques for Measurement

Thousand Oaks, CA

The classic technique for a nondestructive measurement of residual stress is the use of X-ray diffraction. It is really quite an old method. There is a classic paper by Norton and Rosenthal written back in 1943. The method was used during the second World War, I believe, in connection with the study of welded structures in ships. A more or less portable piece of equipment was built even in those days. The method did not come, as far as I know, into very widespread use. I think I now understand this better after hearing yesterday•s talks. It seems clear that a nondestructive testing or evaluation method must be cheap, quick and simple; the early X-ray techniques were none of those. They depended on the use of photographic film. The exposure had to be made; the film had to be developed. In many cases it had to be measured with a microdensitometer. It required a rather skilled person to do it, so it was not really a very attractive procedure.