TY - GEN
T1 - Investigation on Mode I propagation behavior of fatigue crack in precipitation-hardened aluminum alloy with different Mg content
AU - Anis, S. F.
AU - Koyama, M.
AU - Noguchi, H.
N1 - Funding Information:
One of the authors (S.F. Anis), would like to thank for the financial support provided to this study by the Ministry of Higher Education, Malaysia (MOHE) and University of Technology, Malaysia.
Publisher Copyright:
© 2017 Trans Tech Publications, Switzerland.
PY - 2017
Y1 - 2017
N2 - The influence of excess Mg on the Mode I propagation of fatigue crack was examined in newly developed precipitation-hardened Al alloy containing Zr and excess Mg. The aim of this study was to evaluate the underlying factor affecting fatigue crack growth rate in the stage II region. For this purpose, the rotating bending fatigue tests were performed in constant amplitude loading, and replication technique with an optical microscope was used to measure the crack growth in the Al alloys. Through analyses of the crack propagation on the specimen surface and striation formation of the fracture surface, the effects of excess Mg in the Al alloys were clarified to promote the occurrence of mode I fatigue crack, and decelerate the fatigue crack propagation. These facts suggest that the dynamic strain aging of Mg induces the formation of fatigue striation and reduce the driving force of the crack propagation. The findings were supported by the fractographic observations in the fatigue crack propagation region.
AB - The influence of excess Mg on the Mode I propagation of fatigue crack was examined in newly developed precipitation-hardened Al alloy containing Zr and excess Mg. The aim of this study was to evaluate the underlying factor affecting fatigue crack growth rate in the stage II region. For this purpose, the rotating bending fatigue tests were performed in constant amplitude loading, and replication technique with an optical microscope was used to measure the crack growth in the Al alloys. Through analyses of the crack propagation on the specimen surface and striation formation of the fracture surface, the effects of excess Mg in the Al alloys were clarified to promote the occurrence of mode I fatigue crack, and decelerate the fatigue crack propagation. These facts suggest that the dynamic strain aging of Mg induces the formation of fatigue striation and reduce the driving force of the crack propagation. The findings were supported by the fractographic observations in the fatigue crack propagation region.
KW - Al6061-T6 alloy
KW - Dynamic strain aging
KW - Fatigue striation
KW - Mode I crack
KW - Rotating bending fatigue test
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U2 - 10.4028/www.scientific.net/MSF.889.143
DO - 10.4028/www.scientific.net/MSF.889.143
M3 - Conference contribution
AN - SCOPUS:85016514255
SN - 9783038357704
T3 - Materials Science Forum
SP - 143
EP - 147
BT - Engineering and Innovative Materials V
A2 - Yahaya, Muhammad
PB - Trans Tech Publications Ltd
T2 - 5th International Conference on Engineering and Innovative Materials, ICEIM 2016
Y2 - 10 September 2016 through 12 September 2016
ER -