Severe plastic deformation through adiabatic shear banding in Fe-C steels
Severe plastic deformation is observed within adiabatic shear bands in iron-carbon steels. These shear bands form under high strain rate conditions, in excess of 1000 s{sup -1}, and strains in the order 5 or greater are commonly observed. Studies on shear band formation in a ultrahigh carbon steel (1.3%C) are described in the pearlitic condition. A hardness of 11.5 GPa (4600 MPa) is obtained within the band. A mechanism is described to explain the high strength based on phase transformation to austenite from adiabatic heating resulting from severe deformation. Rapid re-transformation leads to an ultra-fine ferrite grain size containing carbon principally in the form of nanosize carbides. It is proposed that the same mechanism explains the ultrahigh strength of iron-carbon steels observed in ball-milling, ball drop tests and in severely deformed wires.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 936462
- Report Number(s):
- UCRL-JRNL-208377; MSAPE3; TRN: US200818%%800
- Journal Information:
- Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing, Vol. 410-411; ISSN 0921-5093
- Country of Publication:
- United States
- Language:
- English
Similar Records
Influence of severe plastic deformation on the structure and properties of ultrahigh carbon steel wire
Deformation and Shear Band Development in an Ultrahigh Carbon Steel During High Strain Rate Deformation