Corrosion fatigue crack initiation and initial propagation mechanism of E690 steel in simulated seawater

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2017专题

	Corrosion fatigue crack initiation and initial propagation mechanism of E690 steel in simulated seawater
	Zhang, Bowei; Zhao, Tianliang; Liu, Zhiyong; Du, Cuiwei; Dai, Chunduo; Li, Xiaogang
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2017
卷号	708 页码:181-192
ISSN号	0921-5093
英文摘要	In the present paper, the corrosion fatigue crack initiation and initial propagation mechanism of E690 steel in simulated seawater were studied by stress-controlled fatigue tests and a series of subsequent characterizations on the fracture surface, microstructure and secondary cracks. Results show that the corrosion fatigue crack initiation and initial propagation mechanism evolves with elevated peak stress level in simulated seawater. When peak stress is far below the proof stress, cracks preferentially initiate at the parent austenite grain boundaries (PAGBs) with 68.4% probability and at the ferrite lath boundaries (FLBs) with 31.6% probability. Meanwhile, the cracks also preferentially propagate along the PAGBs and FLBs. Upon the peak stress close to or above the proof stress, cracks turn to initiate from the emerging corrosion pits and propagate without zigzag detour but by splitting the ferrite laths which transversely block its propagation way.
公开日期	2017-12-25
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/13470]
专题	2017专题
推荐引用方式 GB/T 7714	Zhang, Bowei,Zhao, Tianliang,Liu, Zhiyong,et al. Corrosion fatigue crack initiation and initial propagation mechanism of E690 steel in simulated seawater[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2017,708:181-192.
APA	Zhang, Bowei,Zhao, Tianliang,Liu, Zhiyong,Du, Cuiwei,Dai, Chunduo,&Li, Xiaogang.(2017).Corrosion fatigue crack initiation and initial propagation mechanism of E690 steel in simulated seawater.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,708,181-192.
MLA	Zhang, Bowei,et al."Corrosion fatigue crack initiation and initial propagation mechanism of E690 steel in simulated seawater".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 708(2017):181-192.