TY - JOUR
T1 - The behavior of fatigue crack initiation and propagation in AA2524-T34 alloy
AU - Zheng, Z. Q.
AU - Cai, B.
AU - Zhai, T.
AU - Li, S. C.
PY - 2011/2/25
Y1 - 2011/2/25
N2 - With the help of a four-point-bend fatigue rig, high-cycle fatigue tests were carried out on an AA2524 Al alloy at room temperature, 15. Hz and R=-0.1 in ambient air. Optical microscopy (OM) and scanning electron microscopy (SEM) were employed to capture a detailed view of the fatigue crack initiation and propagation of the samples as well. The fatigue strength is 70. pct of their yield strength. Fatigue cracks were found to be always initiated from the second phase particles or the interface between the second phase particles and matrix. And grain orientation may be the key factor controlling the micro-crack deflection.
AB - With the help of a four-point-bend fatigue rig, high-cycle fatigue tests were carried out on an AA2524 Al alloy at room temperature, 15. Hz and R=-0.1 in ambient air. Optical microscopy (OM) and scanning electron microscopy (SEM) were employed to capture a detailed view of the fatigue crack initiation and propagation of the samples as well. The fatigue strength is 70. pct of their yield strength. Fatigue cracks were found to be always initiated from the second phase particles or the interface between the second phase particles and matrix. And grain orientation may be the key factor controlling the micro-crack deflection.
KW - Aluminum alloys
KW - Fatigue crack initiation
KW - Micro-crack propagation
UR - https://www.scopus.com/pages/publications/78650514822
UR - https://www.scopus.com/inward/citedby.url?scp=78650514822&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2010.10.085
DO - 10.1016/j.msea.2010.10.085
M3 - Article
AN - SCOPUS:78650514822
SN - 0921-5093
VL - 528
SP - 2017
EP - 2022
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
IS - 4-5
ER -