Effect of Dynamic Strain Aging on Fatigue Softening Process of H68 Brass

Abstract:

Studies of the influences of symmetric tensile-compressive low cyclic fatigue behavior and dynamic strain aging (DSA) pre-treatment on H68 brass were made. The results showed that the cyclic softening was the main factor that controlled the fatigue life after various pre-treatments. The process of cyclic softening was believed to be related to the change of dislocation configuration. TEM observation indicated that the uniform and stable dislocation networks with high density formed after DSA pre-treatment, which increased the deformation stress, decreased the cyclic strain. The cyclic softening was caused by the low dislocation density and elongated cell structure with low energy

• Periodical: Key Engineering Materials (Volumes 297-300)
• Pages: 2508-2512
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.297-300.2508
• Online since: November 2005
• Authors: Kai Ping Peng, Wen Zhe Chen, Kuang Wu Qian
• Keywords: Dynamic Strain Aging (DSA), H68 Brass, Low Cycle Fatigue, Softening Process

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