Title: High cycle fatigue of electrical-discharge machined AISI D2 tool steel

Authors: Y.H. Guu, H. Hocheng

Addresses: Department of Mechanical Engineering, National Lien-Ho College of Technology and Commerce, Miaoli 360, Taiwan, Republic of China. Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 30043, Taiwan, Republic of China

Abstract: An analysis of electrical-discharge machined AISI D2 tool steel for high-cycle fatigue is conducted. The damage model was developed to reveal the influence of different electrical-discharge machining conditions on the fatigue life. The processed surface layer and the cross-section were examined by scanning electron microscopy (SEM).The experimental results show that the fatigue life of the EDMed specimens is shorter than the mechanically polished samples. These results can be attributed to the micro damage in the resolidified surface layer produced by EDM. The effect of the magnitude of the pulse current on the fatigue life of the specimen is more significant than the pulse on-time. The predicted results agree fairly with the experimental results.

Keywords: tool steel; electrical-discharge machining; EDM; high cycle fatigue; fatigue limit; damage mechanics.

DOI: 10.1504/IJMPT.2001.001286

International Journal of Materials and Product Technology, 2001 Vol.16 No.6/7, pp.642-657

Published online: 01 Jul 2003 *

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