The Effect of Bi on the Selective Oxide Formation on CMnSi TRIP Steel
SCIE
SCOPUS
- Title
- The Effect of Bi on the Selective Oxide Formation on CMnSi TRIP Steel
- Authors
- Oh, J; Cho, L; Kim, M; Kang, K; De Cooman, BC
- Date Issued
- 2016-11
- Publisher
- SPRINGER
- Abstract
- The effect of Bi addition on the selective oxidation and the galvanizability of CMnSi transformation-induced plasticity (TRIP) steels was studied by hot dip galvanizing laboratory simulations. Bi-added TRIP steels were intercritically annealed at 1093 K (820 A degrees C) and galvanized in a 0.22 wt pct Al-containing Zn bath. The oxide morphology was investigated by scanning electron microscopy, transmission electron microscopy, and 3D atom probe tomography. Bi formed a Bi-enriched surface layer during the intercritical annealing. A decrease of the oxygen permeability was observed with increasing Bi addition. The internal oxidation was suppressed in Bi-added CMnSi TRIP steel. The surface oxide morphology was changed from a continuous layer morphology to a more lens-shaped morphology. The galvanizability of the Bi-added TRIP steel was improved by the combination of the change of the oxide morphology and the dissolution of the Bi-enriched surface layer during immersion of the strip in the Zn bath.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/37511
- DOI
- 10.1007/s11661-016-3735-9
- ISSN
- 1073-5623
- Article Type
- Article
- Citation
- METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, vol. 47A, no. 11, page. 5474 - 5486, 2016-11
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