Analysis of the Mechanical Properties of N-Added CMn Structural Steel by the Impulse Internal Friction Technique
SCIE
SCOPUS
- Title
- Analysis of the Mechanical Properties of N-Added CMn Structural Steel by the Impulse Internal Friction Technique
- Authors
- Jaehyuk Jung; Kozeschnik, E; Seongho Han; De Cooman, BC
- Date Issued
- 2012-12
- Publisher
- Springer
- Abstract
- The presence of substitutional solutes has a strong influence on the Snoek effect of interstitial atoms in body-centered cubic (bcc) Fe alloys, such as the structural CMn steel grades produced in hot strip mills. In the current study, bcc Fe-Mn-N alloys were analyzed using the impulse technique and the results were correlated to their mechanical properties and the AlN precipitation characteristics. The broadened Snoek peak related to the octahedral interstitial N could be resolved into three distinct Debye peaks related to the arrangement of Mn atoms surrounding the N atoms. The simulation results suggest that precipitation of AlN occurred mainly during coiling and that the precipitation kinetics was enhanced at higher coiling temperatures. Alloys isothermally held at high temperatures had a yield strength and tensile strength linearly proportional to the difference between the nominal N content and the interstitial N content. The observations point to the pronounced precipitation strengthening effect of AlN after high-temperature coiling simulations. The result also reveals that interstitial N increases both the yield strength and the tensile strength in steels coiled at low temperatures.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/11587
- DOI
- 10.1007/s11661-012-1279-1
- ISSN
- 1073-5623
- Article Type
- Article
- Citation
- METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, vol. VOL.43A, no. NO.12, page. 4587 - 4600, 2012-12
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