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- Title
Investigation into Competitive Mechanism of Carbon Partitioning and Pseudospinodal Decomposition of Supersaturated Martensite in Q&P Steel Containing High Silicon.
- Authors
Du, Hao; Gong, Yu; Li, Zhu; Lu, Xianwen; Jin, Xuejun
- Abstract
In this study, the competing mechanisms of carbon partitioning and concurrent pseudospinodal decomposition of supersaturated martensite, forming superlattice-ordered α″-Fe16C2, are elucidated in a quenching and partitioning (Q&P) steel containing high silicon based on various microstructural characterizations. Our results demonstrate that the fluctuation of carbon content caused by high-density dislocations and transformation residual stress in martensite may stimulate the pseudospinodal decomposition. Furthermore, the sluggish diffusion kinetics of silicon and nickel inhibits further transformation from α″-Fe16C2 to carbide precipitation. The experimental results provide new insights into the pseudospinodal decomposition and carbon redistribution mechanism during the carbon partitioning process.
- Subjects
MARTENSITE; DIFFUSION kinetics; STEEL; RESIDUAL stresses; CARBON
- Publication
Metallurgical & Materials Transactions. Part A, 2021, Vol 52, Issue 6, p2123
- ISSN
1073-5623
- Publication type
Article
- DOI
10.1007/s11661-021-06232-6