4.6 Article

Documenting Ferrite Nucleation Behavior Differences in the Heat-Affected Zones of EH36 Shipbuilding Steels with Mg and Zr Additions

Publisher

SPRINGER
DOI: 10.1007/s11661-019-05387-7

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Funding

  1. National Natural Science Foundation of China [51622401, 51628402, 51861130361, 51861145312, 51850410522]
  2. Newton Advanced Fellowship by Royal Society [RP12G0414]
  3. Research Fund for Central Universities [N172502004]
  4. National Key Research and Development Program of China [2016YFB0300602]
  5. Global Talents Recruitment Program
  6. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University [SKLSP201805]
  7. China Scholarship Council [201806080143]
  8. Chinese Association for Science and Technology

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The nucleation behavior of ferrites in the heat-affected zones of EH36-Mg and EH36-Zr shipbuilding steels has been documented. Ferrite laths preferred to nucleate on the surface of Al-Mg-Ti-O-Mn-S inclusions in EH36-Mg, but austenite grain boundaries in EH36-Zr, respectively. It is speculated that Al-Mg-Ti-O-Mn-S provides more effective ferrite nucleation sites than Zr-O-Mn-S-Ca-Mg, and a larger driving force is required for the transformation on Zr-O-Mn-S-Ca-Mg. Such differences led to significant variations of the resultant microstructures.

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