Overview of fatigue performance of Cu processed by severe plastic deformation
This study investigated discrepancies regarding cyclic softening of Cu processed by severe plastic deformation (SPD). All samples softened if the microhardnesses before and after fatiguing are compared. However, the effect decreases if the strain amplitude is small, {Delta}{epsilon}{sub p} {lt} x 10{sup {minus}3}. Samples with equiaxed subgrains were more resistant to softening and thermal recovery. All samples had persistent shear bands except those tested at the highest amplitudes, {Delta}{epsilon}{sub p} {gt} 1 x 10{sup {minus}2}. Cu processed by SPD exhibits an enhanced fatigue life at low amplitudes. However, low thermal stability, potential for softening, and poor low-cycle properties discredit this advantage.
- Research Organization:
- Northwestern Univ., Evanston, IL (US)
- OSTI ID:
- 20000142
- Journal Information:
- Journal of Electronic Materials, Vol. 28, Issue 9; Conference: 1999 TMS Annual Meeting, San Diego, CA (US), 03/02/1999--03/03/1999; Other Information: PBD: Sep 1999; ISSN 0361-5235
- Country of Publication:
- United States
- Language:
- English
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