Characterisation and Quantification of Complex Bainitic Microstructures in High and Ultra-High Strength Linepipe Steels

Author:

Zajac Stanislaw1,Schwinn Volker2,Tacke K.H.

Affiliation:

1. Swedish Institute for Metals Research

2. Aktiengesellschaft der Dillinger Huettenwerke

Abstract

This paper provides a detailed description of complex bainitic microstructures obtained during the recent development of low carbon linepipe steels with strengths in the range of X100 to X120. New experimental techniques based on a high resolution FEG-SEM and EBSD have been used to characterise and quantify the mixture of ultrafine bainitic ferrite and nanosize second phases in these steels. It was found that the occurrence of incomplete transformation generates new, previously unexplored bainitic microstructures with a wealth of microstructural features that is beyond classification based on conventional concepts. Clear differences in distributions of boundary misorientations and effective grain size were noted between upper, lower and granular bainites. Based on these results a new classification scheme and definition of bainite is proposed.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Reference6 articles.

1. V. Schwinn, S. Zajac, P. Fluess and K-H Tacke: Proc. Conf. Pipeline Technology 2004, Ostend, Belgium, May. 9-13 (2004), p.834.

2. J. K. Koo et al.: Proc. 13th Int. Offshore and Polar Engineering Conf., Honolulu, Hawaii, USA, May 25-30 (2003), p.10.

3. C. W. Petersen at al.: Patent US 2003/0098096 (2003).

4. S. Zajac et al.: Quantitative structure-property relationships for complex bainitic steels, ECSC247, Draft Final Report (2004).

5. Atlas of bainitic microstructures, ISIJ Bainite Committee (1992).

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3