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Enhancing the fatigue property of rolled AZ31 magnesium alloy by controlling {10-12} twinning-detwinning characteristics

Published online by Cambridge University Press:  31 January 2011

Seong-Gu Hong ,
Sung Hyuk Park  and
Chong Soo Lee
Seong-Gu Hong*
Affiliation:
Division of Industrial Metrology, Korea Research Institute of Standards and Science, Daejeon 305-340, Republic of Korea
Chong Soo Lee*
Affiliation:
Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
*
a)Address all correspondence to this author. e-mail: [email protected]; [email protected]
b)Address all correspondence to this author. e-mail: [email protected]
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Abstract

An improvement of the fatigue resistance of rolled AZ31 magnesium alloy was attempted by reducing the tensile mean stress developed during fatigue deformation, which was achievable by tailoring the {10-12} twinning-detwinning characteristics of the material through the precompression process. The modification of the {10-12} twinning-detwinning characteristics made it possible to control the plastic deformation mechanisms activated during fatigue deformation so that the imposed tensile strain could be fully accommodated by detwinning alone, which led to a significant reduction of tensile flow stress, finally resulting in the reduction of mean stress.

Keywords

MgFatigueMicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 4 , April 2010 , pp. 784 - 792
Copyright
Copyright © Materials Research Society 2010

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References

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