TY - JOUR
T1 - Small crack initiation and early propagation in an as-extruded Mg-10Gd-3Y-0.5Zr alloy in high cycle fatigue regime
AU - He, Chao
AU - Shao, Xiaohong
AU - Yuan, Shucheng
AU - Peng, Liming
AU - Wu, Yujuan
AU - Wang, Qingyuan
AU - Chen, Qiang
N1 - Funding Information:
This research was financially supported by the National Key Research and Development Program of China (Nos. 2016YFB0701201 and 2018YFE0307104 ), the National Natural Science Foundation of China (Nos. 11602038 , 51771113 , 51671128 , 11772209 , and 11572057 ), and the United Fund of the National Department of Education and Equipment Development (No. 6141A02033213 ). Grant-in Aid for a JSPS Research Fellow (No. P16809 ) was received with appreciation. Special thanks to the Ultramicroscopy Research Center (URC) at Kyushu University for the EBSD analysis. Support of Dr. Yongjie LIU is highly acknowledged.
Funding Information:
This research was financially supported by the National Key Research and Development Program of China (Nos. 2016YFB0701201 and 2018YFE0307104), the National Natural Science Foundation of China (Nos. 11602038, 51771113, 51671128, 11772209, and 11572057), and the United Fund of the National Department of Education and Equipment Development (No. 6141A02033213). Grant-in Aid for a JSPS Research Fellow (No. P16809) was received with appreciation. Special thanks to the Ultramicroscopy Research Center (URC) at Kyushu University for the EBSD analysis. Support of Dr. Yongjie LIU is highly acknowledged.
Publisher Copyright:
© 2018
PY - 2019/1/28
Y1 - 2019/1/28
N2 - High cycle fatigue testing was performed on an as-extruded Mg-10Gd-3Y-0.5Zr alloy to investigate its fatigue crack initiation and early propagation behaviors. Experimental results showed that only basal slip was activated at a low cyclic stress amplitude. Fatigue crack initiated from the slip bands along the basal plane, leading to the formation of cleavage-like facets on the fracture surface. The formation of facets around the crack initiation sites consumed a vast majority of the cyclic loadings in high cycle fatigue regime, and small fatigue crack propagation was significantly retarded by local microstructure heterogeneity of neighboring grains. This can be ascribed to the incompatible deformation at low cyclic stresses, resulting in the localization of slip bands within isolated grains.
AB - High cycle fatigue testing was performed on an as-extruded Mg-10Gd-3Y-0.5Zr alloy to investigate its fatigue crack initiation and early propagation behaviors. Experimental results showed that only basal slip was activated at a low cyclic stress amplitude. Fatigue crack initiated from the slip bands along the basal plane, leading to the formation of cleavage-like facets on the fracture surface. The formation of facets around the crack initiation sites consumed a vast majority of the cyclic loadings in high cycle fatigue regime, and small fatigue crack propagation was significantly retarded by local microstructure heterogeneity of neighboring grains. This can be ascribed to the incompatible deformation at low cyclic stresses, resulting in the localization of slip bands within isolated grains.
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U2 - 10.1016/j.msea.2018.10.015
DO - 10.1016/j.msea.2018.10.015
M3 - Article
AN - SCOPUS:85058930932
SN - 0921-5093
VL - 744
SP - 716
EP - 723
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
ER -