Formation, quantification and morphology of retained austenite in the heat-affected zone of a high-strength steel

Daniel Schrittwieser; Thomas Willidal; Oleksandr Glushko; Ronald Schnitzer

doi:10.1177/13621718261421674

Formation, quantification and morphology of retained austenite in the heat-affected zone of a high-strength steel

Lehrstuhl für Metallkunde (420)

voestalpine Böhler Welding Austria GmbH, Kapfenberg

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Begutachtung

Abstract

This study focuses on the formation, quantification and morphology of retained austenite in the heat-affected zone (HAZ) of a thermomechanically controlled processed high-strength steel. Physical simulation using dilatometry combined with high-energy X-ray diffraction was employed for in situ phase quantification, while various electron microscopy methods were used for microstructural investigation. Compared to the initial state, which contained approximately 1% retained austenite, the content increased by 1.9% in the coarse-grained HAZ and by 3.9% in the intercritically reheated coarse-grained HAZ. Some of the formed retained austenite appears as stand-alone phase in both zones. However, the majority seems to be present within various types of martensite–austenite constituents.

Originalsprache	Englisch
Seiten (von - bis)	128-135
Seitenumfang	8
Fachzeitschrift	Science and Technology of Welding and Joining
Jahrgang	2026
Ausgabenummer	Volume 31, Issue 2
Frühes Online-Datum	16 Feb. 2026
DOIs	https://doi.org/10.1177/13621718261421674
Publikationsstatus	Veröffentlicht - März 2026

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© The Author(s) 2026. This article is distributed under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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abstract = "This study focuses on the formation, quantification and morphology of retained austenite in the heat-affected zone (HAZ) of a thermomechanically controlled processed high-strength steel. Physical simulation using dilatometry combined with high-energy X-ray diffraction was employed for in situ phase quantification, while various electron microscopy methods were used for microstructural investigation. Compared to the initial state, which contained approximately 1\% retained austenite, the content increased by 1.9\% in the coarse-grained HAZ and by 3.9\% in the intercritically reheated coarse-grained HAZ. Some of the formed retained austenite appears as stand-alone phase in both zones. However, the majority seems to be present within various types of martensite{\textendash}austenite constituents.",

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Formation, quantification and morphology of retained austenite in the heat-affected zone of a high-strength steel. / Schrittwieser, Daniel; Willidal, Thomas; Glushko, Oleksandr et al.
in: Science and Technology of Welding and Joining, Jahrgang 2026, Nr. Volume 31, Issue 2, 03.2026, S. 128-135.

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Begutachtung

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AU - Willidal, Thomas

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N1 - Publisher Copyright: © The Author(s) 2026. This article is distributed under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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