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The Relationship between Shear Bands and Crack Growth Behavior in Ultrafine Grained Copper Processed by Severe Plastic Deformation

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Abstract:

Fatigue life of smooth specimens is approximately controlled by the growth life of a small crack. This means the growth behavior of small cracks must be clarified to estimate the fatigue life of plain members. However, there are few studies on the growth behavior of small cracks in ultrafine grained (UFG) metals. In the present study, fatigue tests for UFG copper have been conducted. The formation behavior of shear bands (SBs) and growth behavior of a small crack have been monitored to clarify the effect of SBs on the growth behavior of a major crack.

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Info:

Periodical:

Key Engineering Materials (Volumes 452-453)

Pages:

645-648

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.452-453.645

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Online since:

November 2010

Authors:

Masahiro Goto, S.Z. Han, Yuji Yokoho, Kazuya Nakashima, S.S. Kim, Kwang Jun Euh

Keywords:

Copper (Cu), Crack Growth, Equal-Channel Angular Pressing (ECAP), Fatigue, Shear Band

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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References

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