TY - JOUR
T1 - Effect of microstructural feature on the tensile properties and vibration fracture resistance of friction stirred 5083 Alloy
AU - Huang, Kuo Tsung
AU - Lui, Truan Sheng
AU - Chen, Li Hui
N1 - Funding Information:
Financial support from the National Science Council of Taiwan is gratefully acknowledged (contract no. NSC 96-2221-E-006-104).
Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/7/7
Y1 - 2011/7/7
N2 - In this study, 5083 Al-Mg plates were friction stirred at optimal rotation speeds to investigate the tensile properties and vibration fracture resistance. As a result, grain refinement could be observed at the stir zone with 7 μm average grain size and fine particles could be observed as well. The tensile strain-elongation curves reveal that the tensile strength and elongation tended to increase as the microstructure was refined in the friction stirred sample. The D-N curves of the specimens recorded under an identical initial deflection show that there was a slight difference between the parent metal and the friction stirred sample. A refined grain size is partially responsible for an improvement in vibration fracture resistance; however there is another factor which plays a role too. It should be noted that the deterioration of vibration fracture resistance is a consequence of fine particles stirred into a softened matrix. From the crack propagation results, an intergranular crack propagation feature can be recognized in the friction stirred specimen, and it is reasonable to suggest that the fine particles played an important role in the deterioration of the vibration fracture resistance.
AB - In this study, 5083 Al-Mg plates were friction stirred at optimal rotation speeds to investigate the tensile properties and vibration fracture resistance. As a result, grain refinement could be observed at the stir zone with 7 μm average grain size and fine particles could be observed as well. The tensile strain-elongation curves reveal that the tensile strength and elongation tended to increase as the microstructure was refined in the friction stirred sample. The D-N curves of the specimens recorded under an identical initial deflection show that there was a slight difference between the parent metal and the friction stirred sample. A refined grain size is partially responsible for an improvement in vibration fracture resistance; however there is another factor which plays a role too. It should be noted that the deterioration of vibration fracture resistance is a consequence of fine particles stirred into a softened matrix. From the crack propagation results, an intergranular crack propagation feature can be recognized in the friction stirred specimen, and it is reasonable to suggest that the fine particles played an important role in the deterioration of the vibration fracture resistance.
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U2 - 10.1016/j.jallcom.2011.04.080
DO - 10.1016/j.jallcom.2011.04.080
M3 - Article
AN - SCOPUS:79958019992
SN - 0925-8388
VL - 509
SP - 7466
EP - 7472
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 27
ER -