The influence of aluminum alloying on ductile-to-brittle transition in hadfield steel single crystals

verfasst von: E. G. Astafurova, Yu I. Chumlyakov, H. J. Maier
Abstract: Using single crystals of steels Fe-13Mn-1.3C (Hadfield steel, I) and Fe-13Mn-2, 7Al-1.3C (II) (wt. %) oriented along [011], [1̄44], and [1̄11] directions, the peculiarities of a ductile-to-brittle transition (DBT) were investigated by transmission and scanning electron microscopies, X-ray researches. Under tension of steels investigated in a temperature interval of (77-673)K, the DBT was established, and the DBT temperature interval has been found to be independent on single crystal orientation. Twinning was revealed to be a primary deformation mechanism of [011], [1̄44], and [1̄11] Hadfield steel single crystals from the very beginning of plastic flow in a temperature interval of (77-293)K. Alloying with aluminum increases stacking fault energy of steel I and, therefore, suppresses twinning partially. It starts after portion of slip but, nevertheless, influences fracture mechanism of steel II. Consequently, DBT is determined by high stress level, strong temperature dependence of critical resolved shear stresses due to carbon content in both steels and pronounced mechanical twinning.
Externe Organisation(en): Siberian Branch of the Russian Academy of Sciences
Tomsk State University
Universität Paderborn
Typ: Aufsatz in Konferenzband
Seiten: 5529-5537
Anzahl der Seiten: 9
Publikationsdatum: 2009
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Geotechnik und Ingenieurgeologie

BibTeX

@inproceedings{d737e034e830445fb0f6c7471b9963ad,
title = "The influence of aluminum alloying on ductile-to-brittle transition in hadfield steel single crystals",
abstract = "Using single crystals of steels Fe-13Mn-1.3C (Hadfield steel, I) and Fe-13Mn-2, 7Al-1.3C (II) (wt. %) oriented along [011], [{\=1}44], and [{\=1}11] directions, the peculiarities of a ductile-to-brittle transition (DBT) were investigated by transmission and scanning electron microscopies, X-ray researches. Under tension of steels investigated in a temperature interval of (77-673)K, the DBT was established, and the DBT temperature interval has been found to be independent on single crystal orientation. Twinning was revealed to be a primary deformation mechanism of [011], [{\=1}44], and [{\=1}11] Hadfield steel single crystals from the very beginning of plastic flow in a temperature interval of (77-293)K. Alloying with aluminum increases stacking fault energy of steel I and, therefore, suppresses twinning partially. It starts after portion of slip but, nevertheless, influences fracture mechanism of steel II. Consequently, DBT is determined by high stress level, strong temperature dependence of critical resolved shear stresses due to carbon content in both steels and pronounced mechanical twinning.",
author = "Astafurova, {E. G.} and Chumlyakov, {Yu I.} and Maier, {H. J.}",
year = "2009",
language = "English",
isbn = "9781617382277",
series = "12th International Conference on Fracture 2009, ICF-12",
pages = "5529--5537",
booktitle = "12th International Conference on Fracture 2009, ICF-12",
note = "12th International Conference on Fracture 2009, ICF-12 ; Conference date: 12-07-2009 Through 17-07-2009",
}