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RESEARCH PAPERS

Creep and Creep Recovery of 2618-T61 Aluminum Under Variable Temperature

[+] Author and Article Information
U. W. Cho

University of Missouri-Columbia, Columbia, Mo, 65211

W. N. Findley

Division of Engineering, Brown University, Providence, R.I. 02912

J. Appl. Mech 51(4), 816-820 (Dec 01, 1984) (5 pages) doi:10.1115/1.3167730 History: Received October 01, 1983; Revised February 01, 1984; Online July 21, 2009

Abstract

Creep and creep recovery data are reported for pure tension of 2618-T61 aluminum alloy under variable temperature between 200° C and 230° C. Varying temperature experiments involved an abrupt temperature increase and a linearly increasing and decreasing temperature at a constant stress of 137.9 MPa (20 ksi). A temperature-compensated time by Sherby and Dorn was employed to represent the effect of temperature. A temperature-history-dependent theory using data from constant stress creep and creep recovery together with the apparent activation energy was used to predict the creep under variable temperature. The predictions agreed quite well with the observed data. The apparent activation energy of this alloy was found to be 49,000 cal/mole°K.

Copyright © 1984 by ASME
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