Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 747 |
| Fachzeitschrift | Metals |
| Jahrgang | 12 |
| Ausgabenummer | 5 |
| Publikationsstatus | Veröffentlicht - 27 Apr. 2022 |
Abstract
Deformation-induced martensitic transformation as the basis of a hardening process is dependent, among others, on the stress state. In applications such as cryogenic cutting, where a hardened martensitic subsurface can be produced in metastable austenitic steels, different stress states exist. Furthermore, cutting typically occurs at high strain rates greater than 10 3 s −1. In order to gain a deeper insight into the behavior of a metastable austenitic steel (AISI 304) upon cryogenic cutting, the influence of high strain rates under different loading conditions was analyzed. It was observed that higher strain rates lead to a decrease in the α ′-martensite content if exposed to tensile loads due to generated adiabatic heat. Furthermore, a lath-like α ′-martensite was induced. Under shear stress, no suppression of α ′-martensite formation by higher strain rates was found. A lath α ′ martensite was formed, too. In the specimens that were subjected exclusively to compressive loading, almost no α ′-martensite was present. The martensitic surface generated by cutting experiments showed deformation lines in which α ′-martensite was formed in a wave-like shape. As for the shear specimens, more α ′-martensite was formed with increasing strain rate, i.e., force. Additionally, magnetic etching proved to be an effective method to verify the transformation of ferromagnetic α ′-martensite.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Metalle und Legierungen
- Werkstoffwissenschaften (insg.)
Zitieren
- Standard
- Harvard
- Apa
- Vancouver
- BibTex
- RIS
in: Metals, Jahrgang 12, Nr. 5, 747, 27.04.2022.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - High Strain Rate and Stress-State-Dependent Martensite Transformation in AISI 304 at Low Temperatures
AU - Fricke, Lara Vivian
AU - Gerstein, Gregory
AU - Kotzbauer, Andreas
AU - Breidenstein, Bernd
AU - Barton, Sebastian
AU - Maier, Hans Jürgen
N1 - Funding Information: Funding: This research was funded by the German Research Foundation (DFG) within the research priority program SPP 2086, grant number 401800578. The publication of this article was funded by the Open Access Fund of Leibniz Universität Hannover.
PY - 2022/4/27
Y1 - 2022/4/27
N2 - Deformation-induced martensitic transformation as the basis of a hardening process is dependent, among others, on the stress state. In applications such as cryogenic cutting, where a hardened martensitic subsurface can be produced in metastable austenitic steels, different stress states exist. Furthermore, cutting typically occurs at high strain rates greater than 10 3 s −1. In order to gain a deeper insight into the behavior of a metastable austenitic steel (AISI 304) upon cryogenic cutting, the influence of high strain rates under different loading conditions was analyzed. It was observed that higher strain rates lead to a decrease in the α ′-martensite content if exposed to tensile loads due to generated adiabatic heat. Furthermore, a lath-like α ′-martensite was induced. Under shear stress, no suppression of α ′-martensite formation by higher strain rates was found. A lath α ′ martensite was formed, too. In the specimens that were subjected exclusively to compressive loading, almost no α ′-martensite was present. The martensitic surface generated by cutting experiments showed deformation lines in which α ′-martensite was formed in a wave-like shape. As for the shear specimens, more α ′-martensite was formed with increasing strain rate, i.e., force. Additionally, magnetic etching proved to be an effective method to verify the transformation of ferromagnetic α ′-martensite.
AB - Deformation-induced martensitic transformation as the basis of a hardening process is dependent, among others, on the stress state. In applications such as cryogenic cutting, where a hardened martensitic subsurface can be produced in metastable austenitic steels, different stress states exist. Furthermore, cutting typically occurs at high strain rates greater than 10 3 s −1. In order to gain a deeper insight into the behavior of a metastable austenitic steel (AISI 304) upon cryogenic cutting, the influence of high strain rates under different loading conditions was analyzed. It was observed that higher strain rates lead to a decrease in the α ′-martensite content if exposed to tensile loads due to generated adiabatic heat. Furthermore, a lath-like α ′-martensite was induced. Under shear stress, no suppression of α ′-martensite formation by higher strain rates was found. A lath α ′ martensite was formed, too. In the specimens that were subjected exclusively to compressive loading, almost no α ′-martensite was present. The martensitic surface generated by cutting experiments showed deformation lines in which α ′-martensite was formed in a wave-like shape. As for the shear specimens, more α ′-martensite was formed with increasing strain rate, i.e., force. Additionally, magnetic etching proved to be an effective method to verify the transformation of ferromagnetic α ′-martensite.
KW - cryogenic temperature
KW - deformation-induced martensitic transformation
KW - high strain rates
KW - magnetic etching
KW - subsurface hardening
UR - http://www.scopus.com/inward/record.url?scp=85128826755&partnerID=8YFLogxK
U2 - 10.3390/met12050747
DO - 10.3390/met12050747
M3 - Article
VL - 12
JO - Metals
JF - Metals
SN - 2075-4701
IS - 5
M1 - 747
ER -