Abstract
Tension and torsion creep recovery tests on commercially pure copper at 150, 200 and 250°C are reported. Recoverable strain can range from a negligible percentage to approaching 100 per cent of the total creep strain developed, depending on stress, creep period preceding unloading, and current recovery time. An empirical equation relating creep recovery to these characteristics of the initial creep test is given.
Get full access to this article
View all access options for this article.
References
1.
Henderson
J.
Snedden
J. D.
‘Creep recovery of aluminium alloy’ , Appl. Mater. Res. 1965 4 (3 ), 148 .
2.
Hoff
N. J.
, (Ed.) ‘Creep in structures’ , IUTAM Colloquium, Stanford Univ. , Calif. , 1960 (July), 95 (Springer, Berlin, 1962).
3.
Johnson
A. E.
Henderson
J.
Mathur
V. D.
‘Combined stress creep fracture of a commercial copper at 250°C’ , Engineer, Lond. 1956 202 (5248 ), 261 ; 202 (5249), 299.
4.
Johnson
A. E.
‘A high sensitivity torsion creep unit’ , J. sci. Instrum. 1950 27 (3 ), 74 .
5.
Johnson
A. E.
Henderson
J.
Khan
B.
Complex-stress creep, relaxation and fracture of metallic alloys 1962 (H.M. Stationery Office , Edinburgh ).
6.
Lubahn
J. D.
‘The role of anelasticity in crecp, tension and relaxation behaviour’ , Trans. Am. Soc. Metals 1953 45 , 787 .
7.
Johnson
A. E.
‘The creep recovery of a 0·17 per cent carbon steel’ , Proc. Instn mech. Engrs 1941 145 , 210 .
8.
Lubahn
J. D.
Felgar
R. P.
Plasticity and creep of metals 1961 (John Wiley and Sons Inc. , London ).
