Annealing behavior of nano-layered steel produced by heavy cold-rolling of lath martensite
✍ Scribed by X. Zhao; T.F. Jing; Y.W. Gao; G.Y. Qiao; J.F. Zhou; W. Wang
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 496 KB
- Volume
- 397
- Category
- Article
- ISSN
- 0921-5093
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✦ Synopsis
A study of the annealing behavior of nano-layered steel produced by heavy cold-rolling of lath martensite has been conducted. The results show that the nano-layered structure of lath martensite was stable until annealing at 623 K for 3.6 ks. Subsequently, discontinuous recrystallization began in some regions after 673 K annealing and finished after 873 K annealing. The nano-layered structure in the specimens annealed for 3.6 ks at 673-773 K changed into the multiphase nano-structure composed of equiaxed ferrite grains and carbides. Furthermore, the phenomenon of fracture delamination was observed from the tension fractures of the specimens as-rolled and annealed up to 773 K for 3.6 ks. In addition, the mechanisms of structure stability and mechanical behavior are also discussed.