Title

Nanocrystalline Advanced High Strength Steel Produced by Cold Rolling and Annealing

Abstract

An advanced high strength steel of composition Fe-0.11C-2.46Si-11.5Mn-0.38Al-0.029N (wt pct) was produced with a yield strength of 790 MPa, an ultimate tensile strength of 1300 MPa, and a total elongation of 28 pct. Conventional processing of hot-band steel by cold rolling and annealing at 873 K (600 °C) was used to produce a nanocrystalline structure with an average grain diameter 112 ± 25 nm (68 pct confidence level). Electron backscatter diffraction (EBSD) and X-ray diffraction (XRD) were utilized to characterize the nanocrystalline steel, which consisted of γ-austenite, γ-martensite, and α-ferrite.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Cold rolling; Gamma rays; Hot rolling; Nanocrystals; Tensile strength; X ray diffraction, Advanced high strength steel; Average grain diameter; Conventional processing; Electron back scatter diffraction; Epsilon martensite; Nano-crystalline structures; Nanocrystalline steels; Ultimate tensile strength, High strength steel

International Standard Serial Number (ISSN)

1073-5623; 1543-1940

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2016 The Minerals, Metals & Materials Society and ASM International, All rights reserved.

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