Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1576016 | Materials Science and Engineering: A | 2013 | 25 Pages |
Abstract
We analyze here the basic philosophy of alloy design and process-structure-property paradigm in pipeline steels. Microstructure of pipeline steels of yield strength in the range of 65Â ksi (450Â MPa) to 120Â ksi (840Â MPa) was characterized and the key factors that influenced the microstructure and mechanical properties of pipeline steels were examined. Based on the experimental results and analysis, it is underscored that optimizing C and Mn contents is important to eliminate undesired microstructure and obtain high toughness in pipeline steels. Adequate amount of ferrite is necessary to ensure high deformability of high grade pipeline steels. In ultrahigh strength pipeline steels, bainite obtained through rational alloy design (Mo, B), and suitable processing route (especially high cooling rate and low end cooling temperature) is beneficial in obtaining high strength-toughness combination.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
J. Xu, R.D.K. Misra, B. Guo, Z. Jia, L. Zheng,