On the Role of Grains in Plastic Deformation and Low Cycle Fatigue of Polycrystalline Metal

Abstract:

In the previous papers, the author discussed the role of r-value (anisotropic parameter in plasticity) on the surface roughening after plastic deformation. In the present paper, discussion is made on the effects of mutual constraint of deformation between neighboring grains at the grain boundary on the surface roughening. A characteristic parameter called constraint ratio is introduced to express the degree of the mutual restriction between grains. The well-known Coffin-Manson relation in low cycle fatigue is deduced considering to the surface roughening after cyclic deformation.

• Periodical: Key Engineering Materials (Volume 725)
• Pages: 226-231
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.725.226
• Online since: December 2016
• Authors: Takeji Abe
• Keywords: Anisotropy, Coffin-Manson Relation, Constraint, Grains, Low Cycle Fatigue, Plasticity, Polycrystalline Metal, R-Value

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