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Proceedings Paper

Residual stresses in single-point machined beryllium
Author(s): Harry A. Moreen; Iwao P. Adachi
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Paper Abstract

A single-point turned (SPT) beryllium surface has been evaluated for manifestations of surface damage which could lead to dimensional instability. Surface fissures, residual stress and crystallographic changes have been observed. Measurements of the residual , stresses have been made using a variation of the Treuting-Read Method wherein deformations associated with the progressive removal of surface layers are used to estimate the residual stresses. In this case, the deformations have been measured interferometrically on the reverse surface of the single-point turned disk. Residual stresses of 40,000 psi were observed at the machined surface. At a depth of 120 microinches, the residual stresses are negligible.

Paper Details

Date Published: 1 November 1990
PDF: 11 pages
Proc. SPIE 1335, Dimensional Stability, (1 November 1990); doi: 10.1117/12.22868
Show Author Affiliations
Harry A. Moreen, Rockwell International Corp. (United States)
Iwao P. Adachi, Rockwell International Corp. (United States)

Published in SPIE Proceedings Vol. 1335:
Dimensional Stability
Roger A. Paquin, Editor(s)

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