Correlation of microstructure with tensile behavior and properties of API X70 pipeline steels subjected to strain aging  

作　　者：Sang-in Lee Byoungchul Hwang 

机构地区：[1]Department of Materials Science and Engineering,Seoul National University of Science and Technology,Seoul 01811,Republic of Korea

出　　处：《Journal of Iron and Steel Research International》2020年第3期319-324,共6页

基　　金：This study was supported by the Basic Science Research Program through the National Research Foundation of Korea(NRF-2017R1A2B2009336);The authors thank Dr.Hwan Gyo Jung and Dr.Chang Sun Lee of POSCO for their valuable discussion on strain aging phenomenon.

摘　　要：Variations in tensile behavior and properties after pre-strain and thermal aging were differently affected by strain aging phenomenon dependent on microstructure.With increasing polygonal ferrite fraction,decrement in uniform elongation is increased,and the increment in yield-to-tensile ratio is slightly decreased after pre-strain and thermal aging.Therefore,it can be concluded that the polygonal ferrite has contradictory effects on strain aging resistance although the polygonal ferrite still contributes to improvement of uniform elongation after strain aging.

关 键 词：Steel MICROSTRUCTURE STRAIN AGING DEFORMABILITY PIPELINE 

分 类 号：TG142.1[一般工业技术—材料科学与工程]