Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8004395 | Journal of Iron and Steel Research, International | 2016 | 4 Pages |
Abstract
The dislocation pipe diffusion of Mn during annealing of 5Mn steel was experimentally investigated using transmission electron microscopy (TEM). Many dislocations existed inside the ferrite and terminated at the α/γ interface of the sample after intercritical annealing at 650 °C for 1 min. Line scans of Mn distribution demonstrated a high Mn concentration in austenite and Mn enrichment at dislocations, indicating that the dislocation pipe diffusion of Mn during intercritical annealing occurred in addition to the γ/α interface diffusion. In-situ TEM observations at 500 °C revealed that due to Ostwald ripening, large cementite precipitates grew while small cementite precipitates dissolved via Mn diffusion along the dislocations between them.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Jie LIN, Xi-nan LUO, Xiao-yan ZHONG, Hui-hua ZHOU, Cun-yu WANG, Jie SHI, Han DONG,