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| Content Provider | Springer Nature Link |
|---|---|
| Author | Tian, Yong Li, Qun Wang, Zhao dong Wang, Guo dong |
| Copyright Year | 2015 |
| Abstract | X70 (steel A) and X80 (steel B) pipeline steels were fabricated by ultra fast cooling (UFC). UFC processing improves not only ultimate tensile strength (UTS), yield strength (YS), yield ratio (YS/UTS), and total elongation of both steels, but also their Charpy absorbed energy (A $_{K}$) as well. The microstructures of both steels were all composed of quasi polygonal, acicular ferrite (AF), and granular bainite. MA islands (the mixtures of brittle martensite and residual austenite) are more finely dispersed in steel B, and the amount of AF in steel B is much more than that in steel A. The strength of steel B is higher than that of steel A. This is mainly attributed to the effect of the ferrite grain refinement which is resulted from UFC processing. The finely dispersed MA islands not only provide dispersion strengthening, but also reduce loss of impact properties to pipeline steels. UFC produces low-temperature transformation microstructures containing larger amounts of AFs. The presence of AF is a crucial factor in achieving desired mechanical properties for both steels. It is suggested that the toughness of the experimental steel increases with increasing the amount of AF. |
| Starting Page | 3307 |
| Ending Page | 3314 |
| Page Count | 8 |
| File Format | |
| ISSN | 10599495 |
| Journal | Journal of Materials Engineering and Performance |
| Volume Number | 24 |
| Issue Number | 9 |
| e-ISSN | 15441024 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2015-07-16 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | acicular ferrite (AF) crack growth pipeline steels ultra fast cooling (UFC) Characterization and Evaluation of Materials Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Engineering Design |
| Content Type | Text |
| Resource Type | Article |
| Subject | Mechanics of Materials Materials Science Mechanical Engineering |
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