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Smooth and notched fatigue performance of aging treated and shot peened ZK60 magnesium alloy

Published online by Cambridge University Press:  31 January 2011

Wen-Cai Liu ,
Jie Dong ,
Ping Zhang ,
Xing-Wei Zheng ,
Wen-Jiang Ding ,
De-Hui Li  and
Alexander M. Korsunsky
Wen-Cai Liu
Affiliation:
National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; and Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, United Kingdom
Jie Dong*
Affiliation:
National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Ping Zhang
Affiliation:
Physical Metallurgy and Materials Technology, Technical University of Brandenburg at Cottbus, 03046 Cottbus, Germany
Xing-Wei Zheng
Affiliation:
National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Wen-Jiang Ding
Affiliation:
National Engineering Research Center of Light Alloy Net Forming, and Key State Laboratory of Metal Matrix Composite, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
De-Hui Li
Affiliation:
Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
Alexander M. Korsunsky
Affiliation:
Department of Engineering Science, University of Oxford, Oxford OX1 3PJ, United Kingdom
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The influence of shot peening (SP) on high cycle fatigue (HCF) performance of smooth and notched specimens of hot-extruded ZK60 magnesium alloy was investigated and compared to that of hot-extruded and T5 aging-treated ZK60 magnesium alloy referred to as ZK60-T5. The increases in fatigue properties at the optimum Almen intensities were found to depend on the material states. In contrast to ZK60 alloy, higher smooth and notched fatigue properties for both unpeened and peened specimens were observed for ZK60-T5 alloy. Meanwhile, the improvement of fatigue life for notched specimen by SP was much more than that for the smooth specimen. The mechanism by which the compressive residual stress induced by SP resulted in the improvement of fatigue performance of smooth and notched specimens for ZK60 and ZK60-T5 alloys was discussed.

Keywords

MgFatigueAlloy
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 7 , July 2010 , pp. 1375 - 1387
Copyright
Copyright © Materials Research Society 2010

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