Tensile Properties and Fatigue Strength of Ultrafine Grained Pure Copper

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Oxygen-free copper was processed by equal channel angular pressing with different numbers of ECAP process cycles, NP. Tensile strength was increased with an increase in NP, but it tended to saturate after NP = 4. Conversely, elongation was dramatically decreased by first pressing, but it tended to saturate up to NP = 3, followed by slight increasing trend after NP = 4. Fatigue tests of specimens processed with NP = 4 and 8 were performed. The change in surface morphologies during fatigue was monitored successively. In addition to this, the change in surface hardness was measured. Significant decrease in surface hardness due to cyclic stresses was measured. The physical basis of fatigue damage of UFG copper was discussed based on the experimental results.

Info:

Periodical:

Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie

Pages:

1649-1652

Citation:

M. Goto et al., "Tensile Properties and Fatigue Strength of Ultrafine Grained Pure Copper ", Key Engineering Materials, Vols. 353-358, pp. 1649-1652, 2007

Online since:

September 2007

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$38.00

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