Fatigue of Autofrettaged Thick Tubes: Closed and Open Ended; As-Received and Honed

[+] Author and Article Information
W. N. Findley, R. M. Reed

Brown University, Providence, R.I. 02912

J. Eng. Mater. Technol 105(3), 195-201 (Jul 01, 1983) (7 pages) doi:10.1115/1.3225643 History: Received April 06, 1982; Online September 23, 2009


Results of fatigue tests are presented for thick tubes of 32.3 mm (1.27 in) ID and wall ratio of 2.5 of SAE 4333 steel. Tubes having both as-received and honed bores were autofrettaged to three different degrees. Results are given for both open-ended and closed-ended autofrettage. Autofrettage increased the fatigue strength as much as 107 percent. Over autofrettage and open-ended autofrettage produced results not much different from closed-ended normal autofrettage. Under autofrettage causing half the change in diameter of normal autofrettage produced 21 percent less fatigue strength than normal autofrettage.

Copyright © 1983 by ASME
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