Analysis on the Transverse Corner Cracks in a Low Alloy Steel Using High Energy High Resolution X-Ray Tomography

摘要：

　　The transverse corner cracks in a low alloy steel slab was analyzed using high energy high resolution sychrotron X-ray tomography,and the hot ductility of the steel was studied using a Gleeble 1500 thermo-mechanical simulator.The 3D morphology of internal cracks in steel was well revealed by the microtomography.It was found that the transverse corner cracks in the low alloy steel were propagated along the prior austenite grain boundaries.The hot ductility test indicated that the third brittle temperature range of the steel is 725-833℃.Combined with the crack and fracture morphology and the microstructure of the steel at different temperatures,it was concluded that the transverse crack was mainly induced by the formation of a thin layer of ferrite on the prior austenite grain boundary.

关键词： transverse corner crack X-ray tomography microstructure hot ductility the third brittle temperature range

作者: Shusen LI Wen YANG Xiaogang YANG Lifeng ZHANG Xianghui XIAO

作者单位: School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beij School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beij Advanced Photon Source,Argonne National Laboratory,Argonne,IL 60439,USA

会议类型: 国际会议

会议名称: the 6th International Congress on the Science and Technology of Steelmaking,ICS2015(第六届国际炼钢科技大会)

会议地点: 北京

会议语种:英文

页码: 521-524

在线出版日期: 2015-05-12（万方平台首次上网日期，不代表论文的发表时间）