Study of high strength pipeline steels with different microstructures

IMR OpenIR

	Study of high strength pipeline steels with different microstructures
	W. Wang; Y. Y. Shan; K. Yang
	2009
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	502 期号:1-2 页码:38-44
摘要	In the present study, comparison studies on mechanical properties were made on a commercial X70 grade polygonal ferrite (PF) dominated pipeline steel and a laboratory developed X90 grade acicular ferrite (AF) dominated pipeline steel obtained by optimum thermo-mechanical controlled processing (TMCP). Charpy impact test results indicated that the upper shelfenergy (USE) of the AF pipeline steel was a little bit higher, but its energy transition temperature (ETT) was extremely low, about -162 degrees C, much lower than that of the PF pipeline steel of about -121 degrees C. It was analyzed that higher strength and better toughness of the AF pipeline steel came from its finer grain size and higher density of dislocations and subboundaries, which could be also further proved from the electron backscatter diffraction (EBSD) analysis for its finer effective grain size (EGS) and higher content of low angle grain boundaries (LAGBs), smaller cleavage fracture unit measured from the fracture surface around fracture origin fractured at -196 degrees C, and its more bent crack propagation path in the fracture. (C) 2008 Elsevier B.V. All rights reserved.
部门归属	[wang, wei; shan, yiyin; yang, ke] chinese acad sci, inst met res, shenyang 110016, peoples r china. [wang, wei] chinese acad sci, grad sch, beijing 100049, peoples r china.;shan, yy (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china;yyshan@imr.ac.cn
关键词	Pipeline Steels Polygonal Ferrite (Pf) Acicular Ferrite (Af) Mechanical Properties Electron Backscatter Diffraction (Ebsd) Analysis Low-carbon Transformation
URL	查看原文
WOS记录号	WOS:000263812500007
引用统计	被引频次：128[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32378
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Wang,Y. Y. Shan,K. Yang. Study of high strength pipeline steels with different microstructures[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2009,502(1-2):38-44.
APA	W. Wang,Y. Y. Shan,&K. Yang.(2009).Study of high strength pipeline steels with different microstructures.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,502(1-2),38-44.
MLA	W. Wang,et al."Study of high strength pipeline steels with different microstructures".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 502.1-2(2009):38-44.