Effect of Plastic Deformation on Microstructure Evolution of a High Strength X100 Pipeline

Abstract:

The effects of plastic deformation on the microstructure evolution of grade X100 pipeline were investigated by SEM, TEM and EBSD test. The result shows that quasi-polygon ferrite deforms firstly in the initial stage of plastic strain, and then both acicular ferrite and granular bainite change remarkably with the plastic strain value increase. When the tension stress reaches the tensile strength, micro-cracks nucleate around the inclusion and M/A constitute, expand with the plastic deformation increases, finally cracks connection causes the crack penetration until the expiration. Furthermore, the microscopic orientation concentrates in {111} <112> and {112} <110> direction before the deformation, while crystal orientation in {111} direction enhanced after the deformation.

• Periodical: Advanced Materials Research (Volume 266)
• Pages: 267-274
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.266.267
• Online since: June 2011
• Authors: Li Hua Qi, Jing Niu, Long Yang, Yao Rong Feng, Jian Xun Zhang
• Keywords: Inclusion, M/A Constitution, Microstructure, Plastic Deformation

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