|Fatigue and Fracture Behavior of a Cold-Drawn Commercially Pure Aluminum Wire|
|Hou, JP; Wang, Q; Yang, HJ; Wu, XM; Li, CH; Zhang, ZF; Li, XW; Li, XW (reprint author), Northeastern Univ, Sch Mat Sci & Engn, Dept Mat Phys & Chem, Shenyang 110819, Peoples R China.
|摘要||Fatigue properties and cracking behavior of cold-drawn commercially pure aluminum wires (CPAWs) widely used as the overhead transmission conductors were investigated. It was found that the fracture surface of the CPAWs shows an obvious four-stage fracture characteristic, i.e., crack initiation, planar crack propagation, 45 degrees-inclined crack propagation and final rapid fracture. The crack growth mechanisms for the CPAWs were found quite different from those for the conventional coarse-grained materials. The cracks in the CPAWs firstly grow along the grain boundaries (Stage I crack growth), and then grow along the plane of maximum shear stress during the last stage of cycling (Stage II crack growth), leading to the distinctive fracture surfaces, i.e., the granular surface in the planar crack propagation region and the coarse fatigue striations in the 45 degrees-inclined crack propagation region. The grain boundary migration was observed in the fatigued CPAWs. The increase in fatigue load enhances the dislocation recovery, increases the grain boundary migration rate, and thus promotes the occurrence of softening and damage localization up to the final failure.|
; li, xiao-wu] northeastern univ, sch mat sci & engn, dept mat phys & chem, shenyang 110819, peoples r china
; [hou, jia-peng
; wang, qiang
; yang, hua-jie
; zhang, zhe-feng] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china
; [wu, xi-mao
; li, chun-he] liaoning elect power co ltd, elect power res inst, shenyang 110006, peoples r china
|关键词||Commercially Pure Aluminum Conductor
Grain Boundary Migration
|学科领域||Materials Science, Multidisciplinary
|资助者||National Natural Science Foundation of China (NSFC) [51331007, 51271054, 51231002, 51571058]; Liaoning Electric Power Company Ltd.
|通讯作者||Li, XW (reprint author), Northeastern Univ, Sch Mat Sci & Engn, Dept Mat Phys & Chem, Shenyang 110819, Peoples R China.|
Hou, JP,Wang, Q,Yang, HJ,et al. Fatigue and Fracture Behavior of a Cold-Drawn Commercially Pure Aluminum Wire[J]. MATERIALS,2016,9(9).
Hou, JP.,Wang, Q.,Yang, HJ.,Wu, XM.,Li, CH.,...&Li, XW .(2016).Fatigue and Fracture Behavior of a Cold-Drawn Commercially Pure Aluminum Wire.MATERIALS,9(9).
Hou, JP,et al."Fatigue and Fracture Behavior of a Cold-Drawn Commercially Pure Aluminum Wire".MATERIALS 9.9(2016).