Correlation of microstructure with tensile behavior and properties of API X70 pipeline steels subjected to strain aging
Sang-in Lee1, Byoungchul Hwang1
1 Department of Materials Science and Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
Correlation of microstructure with tensile behavior and properties of API X70 pipeline steels subjected to strain aging
Sang-in Lee1, Byoungchul Hwang1
1 Department of Materials Science and Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
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
Abstract :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.
Key words :
Steel
Microstructure
Strain aging
Deformability
Pipeline
引用本文:
Sang-in Lee,Byoungchul Hwang. Correlation of microstructure with tensile behavior and properties of API X70 pipeline steels subjected to strain aging[J]. Journal of Iron and Steel Research International, 2020, 27(3): 319-324.
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