Abstract
We report the synthesis of nanostructured austenitic AISI 304L stainless steel (SS) through cryorolling (CR) and reversion annealing in the temperature range of 700-800. °C. Severe CR at sub-zero temperature promotes twinning in γ-austenite, which transform into α-martensite with lath thickness of 50-100. nm. Whereas, 50-300. nm size γ-grains recrystallize in nano-twinned α[U+05F3] through reversion annealing as confirmed by transmission electron microscopy (TEM) and electron back scattered diffraction (EBSD) imaging. The evolution of highly processable bulk nano-austenitic SS with bimodal grain size distribution on achieving high strength (~1295. MPa), large tensile ductility (~0.47), and true necking strain of 0.59, have been discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 241-247 |
| Number of pages | 7 |
| Journal | Materials Science and Engineering: A |
| Volume | 631 |
| DOIs | |
| State | Published - 7 Apr 2015 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2015 Elsevier B.V.
Funding
The authors thank V. Das, R. Basu, S. Maity, and S. Bhattacharya for technical assistance. Financial support provided by DST, SERB, Govt. of India for the project entitled “Processing and characterization of bulk nanostructured brass” (Grant number: SR/FTP/ETA-88/2010 ) and SRIC (ISIRD), IIT Kharagpur , are gratefully acknowledged.
| Funders | Funder number |
|---|---|
| Department of Science and Technology, Ministry of Science and Technology, India | |
| Science and Engineering Research Board |
Keywords
- 304L stainless steel
- Electron microscopy
- Grain refinement
- Nanostructured materials
- Twinning
- X-ray diffraction