Influence of the Mg content on the austenite grain growth in heat-affected zone of offshore engineering steels considering TiN particle pinning and Mo solute drag effects
- Title
- Influence of the Mg content on the austenite grain growth in heat-affected zone of offshore engineering steels considering TiN particle pinning and Mo solute drag effects
- Author
- 박주현
- Keywords
- offshore engineering steels; submicrometre and nanometre particles; grain growth; pinning force; solute drag effect; critical particle size
- Issue Date
- 2021-07
- Publisher
- EDP SCIENCES S A
- Citation
- METALLURGICAL RESEARCH & TECHNOLOGY, v. 118, NO 4, Page. 1-14
- Abstract
- The submicrometre and nanometre particle characteristics, soluble element contents, and austenite grain growth behaviors in heat-affected zone of offshore engineering steels with 0.0002 (2Mg) and 0.0042 (42Mg) wt.% Mg during the simulated welding process were studied. With increasing the Mg content in steel from 0.0002 to 0.0042wt.%, the submicron particles are decreased in number and size with their compositions evolved from TiN to TiN+MgO capped with Mo carbides, and the number density of small-sized nanoparticles increases and large-sized nanoparticles decreases. When the temperature is below 1250 degrees C, the grain growth rate of two steels is not much different due to the larger Mo solute drag effect in 2Mg and larger pinning force in 42Mg. When the temperature is 1250-1300 degrees C, the small-sized nanoparticles in 42Mg is more than that in 2Mg, resulting in the larger pinning force and smaller grain growth rate in 42Mg. When heated to 1300-1350 degrees C and soaked at 1350 degrees C for 300s, since large quantities of particles smaller than the critical size (d(cr)) are dissolved, the grain growth rate in 2Mg is smaller than that in 42Mg due to the greater amount of the effective pinning particles and larger pinning force in 2Mg.
- URI
- https://www.metallurgical-research.org/articles/metal/abs/2021/04/metal210050/metal210050.htmlhttps://repository.hanyang.ac.kr/handle/20.500.11754/172598
- ISSN
- 22713646; 22713654
- DOI
- 10.1051/metal/2021052
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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