Results 81 to 90 of about 2,162 (214)

Fracture and fractography of metastable austenites

Metallurgical Transactions, 1971
External test variables such as rate and temperature, and changes in alloy composition are shown to have a number of effects on the fracture of high-strength, metastable austenitic steels. One rate-dependent phenomenon is an unusual fracture mode transition wherein a flat mode changes to a shear mode when the amount of transformation product in the ...
Gerberich, W.W., Hemmings, P.L., Zackay, V.F.   +2 more
openaire   +2 more sources

Effect of Intercritical Austenitization and Starting Matrix on Martensite Start Temperature and Austenite Carbon Concentration in Ductile Iron

In this work, the effect of the intercritical austenitization temperature and time, Ni + Cu concentration and starting matrix (fully ferritic or fully pearlitic) on the volume fraction of austenite (fc), martensite start temperature (Ms) and carbon ...
Aristizábal-Sierra, Ricardo, Aristizábal Sierra, Ricardo Emilio, Mateo García, Carlos, Machado, Harold D., García Mateo, Carlos, Machado González, Harold David   +5 more
core   +1 more source

The Role and Modeling of Ultrafast Heating in Isothermal Austenite Formation Kinetics in Quenching and Partitioning Steel

Metals
A modified Johnson–Mehl–Avrami–Kolmogorov (JMAK) model, including the heating rates, was proposed in this study to improve the accuracy of isothermal austenite formation kinetics prediction.
Jiang Chang, Mai Wang, Xiaoyu Yang, Yonggang Yang, Yanxin Wu, Zhenli Mi   +5 more
doaj   +1 more source

The Influence of Austenitization Conditions on Grain Growth and the Bending Performance of Boron Steel

During production of components using press hardening, the steel will at one point be heated to an austenitic state. Grain growth can occur during this austenitization if the time and temperature are sufficient, where the microstructure becomes ...
Lundholm, Erik, Maissara, Khalifa, Åkerström, Paul   +2 more
core   +1 more source

A kinetic model of the austenitization behavior of additively manufactured 17-4 PH martensitic stainless steel

Journal of Materials Research and Technology
Austenitization is significant for understanding the microstructure and residual stress evolution in additive manufacturing of non-austenitic steels. However, the accurate modeling of austenite transformation of additively manufactured parts is rarely ...
Yi Liu, Michael R. Tucker, Junying Min, Markus Bambach   +3 more
doaj   +1 more source

Mathematical Model of the Processoof Pearlite Austenitization

Archives of Metallurgy and Materials, 2014
The paper presents a mathematical model of the pearlite - austenite transformation. The description of this process uses the diffusion mechanism which takes place between the plates of ferrite and cementite (pearlite) as well as austenite. The process of
Olejarczyk-Wożeńska I., Adrian H., Mrzygłód B.   +2 more
doaj   +1 more source

Austenitization and carbide dissolution of 75Cr1 and 100Cr6 steel [PDF]

Diese Arbeit befasst sich mit der Austenitisierung der Stähle 75Cr1 und 100Cr6 sowie der damit verbundenen Martensitbildung während der anschließenden Abkühlung am Ende der Wärmebehandlung.
Burski, Philipp
core   +1 more source

A better understanding of hydrogen trapping and diffusion in aluminized press-hardenable steels

Journal of Materials Research and Technology
Press hardenable steels (PHS) coated with Al–Si alloy are widely used in the automotive industry owing to their good mechanical properties (Yield Strength >1200 MPa and Tensile Strength >1500 MPa).
M. Krid, M. Mandy, T. Sturel, R. Grigorieva, P. Drillet, P.J. Jacques   +5 more
doaj   +1 more source

Microstructure and mechanical properties of ADI depending on austenitization methods and parameters [PDF]

, 2012
Ductile iron was quenched using two-variant isothermal transformation. The first treatment variant consisted of one-phase austenitization at a temperature t = 830, 860 or 900 C, cooling down to an isothermal transformation temperature of 300 or 400 C and
Szykowny, T., Giętka, T.
core  

THE EFFECT OF HOLDING TIME VARIATIONS IN THE AUSTENITIZATION AND SPHEROIDIZING ANNEALING PROCESSES ON THE MECHANICAL PROPERTIES AND MICROSTRUCTURE OF 304 STAINLESS STEEL THIN FOIL

Rekayasa Mesin
This study discusses the effect of holding time variations in the austenitization and spheroidizing annealing processes on the mechanical properties (hardness and tensile strength) and microstructure of 304 thin foil stainless steel materials.
Abdul Aziz
doaj   +1 more source