Microstructure and properties of low manganese and niobium containing HIC pipeline steel

被引：72

作者：

Nayak, S. S. ^{[1
,2
]}

Misra, R. D. K. ^{[1
,2
]}

Hartmann, J. ^{[3
]}

Siciliano, F. ^{[4
]}

Gray, J. M. ^{[5
]}

机构：

[1] Univ Louisiana Lafayette, Ctr Struct & Funct Mat, Lafayette, LA 70504 USA

[2] Univ Louisiana Lafayette, Dept Chem Engn, Lafayette, LA 70504 USA

[3] USA, Arcelor Mittal Steel, Res & Dev, E Chicago, IN 46312 USA

[4] CBMM, BR-38183970 Araxa, MG, Brazil

[5] EWI Microalloying Int, Houston, TX 77036 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 494卷 / 1-2期

关键词：

Pipeline steels; Microstructure; Low manganese; Niobium;

D O I：

10.1016/j.msea.2008.04.038

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The paper describes the concept of using low manganese content in pipeline steels for hydrogen-induced cracking (HIC) applications. The microstructure of thermomechanically processed pipeline steel primarily consisted of polygonal ferrite and low fraction of pearlite. The cleanliness of the steel was evident as was the absence of centerline segregation. The microstructure contained high dislocation density, sub-boundaries and dislocation substructures. Fine-scale precipitation of niobium carbides Occurred on parallel array of dislocations and on random dislocations that followed [0 0 1](NbC)//[0 0 1](alpha-Fe) relationship with the ferrite matrix. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：456 / 463

页数：8

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