Trading off between dynamic strain aging and substructure evolution in κ-carbide-free lightweight steel at room temperature

H. R. Abedi; A. Zarei Hanzaki; N. Nemati; Dae Eun Kim

doi:10.1016/j.scriptamat.2018.07.044

Trading off between dynamic strain aging and substructure evolution in κ-carbide-free lightweight steel at room temperature

H. R. Abedi, A. Zarei Hanzaki, N. Nemati, Dae Eun Kim

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The previous proposed models to describe the room temperature dynamic strain aging of twinning-induced-plasticity steels appear to be theoretically invalid in the case of lightweight grades. The proposed theory in the present work accentuates the high capability of the experimented dilute solid solution in progressive formation and refinement of the cell structures. The higher dislocation population in the cell-walls in comparison to that of cell-interiors is viable enough to increase the stress assisted drift and stimulate the sub-boundaries preferred sites to accommodate the solutes. The short-range dislocation core diffusion enables the cell-walls to assist the strain aging to occur.

Original language	English
Pages (from-to)	110-114
Number of pages	5
Journal	Scripta Materialia
Volume	157
DOIs	https://doi.org/10.1016/j.scriptamat.2018.07.044
Publication status	Published - 2018 Dec

Bibliographical note

Funding Information:
This work was partly supported by the National Research Foundation of Korea (NRF) grant funded by Korea government (MSIP) (No. 2010-0018289 ) and Brain Korea 21 Plus project in 2017. The first author thanks the partial scientific support of Mr. Mehrdad Ghiasabadi Farahani form University of Tehran.

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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title = "Trading off between dynamic strain aging and substructure evolution in κ-carbide-free lightweight steel at room temperature",

abstract = "The previous proposed models to describe the room temperature dynamic strain aging of twinning-induced-plasticity steels appear to be theoretically invalid in the case of lightweight grades. The proposed theory in the present work accentuates the high capability of the experimented dilute solid solution in progressive formation and refinement of the cell structures. The higher dislocation population in the cell-walls in comparison to that of cell-interiors is viable enough to increase the stress assisted drift and stimulate the sub-boundaries preferred sites to accommodate the solutes. The short-range dislocation core diffusion enables the cell-walls to assist the strain aging to occur.",

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AU - Kim, Dae Eun

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