Relationship Between Bake Hardening, Snoek-Köster and Dislocation-Enhanced Snoek Peaks in Coarse Grained Low Carbon Steel

• Autorzy: Lin W. , Zhao S. , Zhang H. , Jin X.

Identyfikatory

DOI

10.1515/amm-2016-0271

• Języki publikacji: EN

Abstrakty

EN

In the present work, specimens prepared from coarse grained low carbon steel with different prestrains were baked and then, their bake hardening (BH) property and internal friction were determined. TEM was used to characterize the dislocation structure in BH treated samples. The measurements of internal friction in prestrained samples and baked samples were carried out using a multifunctional internal friction apparatus. The results indicate that, in coarse grained low carbon steel, the bake hardening properties (BH values) were negative, which were increased by increasing the prestrain from 2 to 5%, and then were decreased by increasing the prestrain from 5 to 10%. In the specimen with prestrain 5%, the BH value reached the maximum value and the height of Snoek-Köster peak was observed to be the maximum alike. With increasing the prestrain, both of the BH value and Snoek-Köster peak heights are similarly varied. It is concluded that Snoek-Köster and dislocation-enhanced Snoek peaks, caused by the interactions between interstitial solute carbon atoms and dislocations, can be used in further development of the bake hardening steels.

Słowa kluczowe

EN

low carbon steel; ultra-low carbon bake-hardening (ULC-BH) steel; bake hardening (BH); Snoek peak; dislocation-enhanced Snoek peak; Snoek-Köster peak; internal friction

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2016
• Tom: Vol. 61, iss. 3
• Strony: 1723--1732
• Opis fizyczny: Bibliogr. 91 poz., rys., wykr.

Twórcy

autor

Lin W.

• School of Materials and Metallurgy, University of Science and Technology Liaoning, Liaoning Anshan, China 114051

autor

Zhao S.

• School of Materials and Metallurgy, University of Science and Technology Liaoning, Liaoning Anshan, China 114051

autor

Zhang H.

• tate Key Laboratory of Rolling Technology and Rolling Automation, Liaoning, Shenyang, China 110000

autor

Jin X.

• Iron and Steel Research Institute of Angang Group, Liaoning, Anshan, China 114009

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Uwagi

EN

W.J. Li would like to express her thanks to the National Natural Science Foundation of China for the funding support and two technical reviewers and anonymous cross-disciplinary reviewers.