Results 141 to 150 of about 2,918 (197)
Some of the next articles are maybe not open access.
Hydrogen Assisted Tempered Martensite Embrittlement of Ultra High Strength Martensitic Steel
Materials Science Forum, 2016The demand for new materials that provide excellent structural performance while reducing weight and being cost-effectively manufactured is increasing. For applications with high strength requirements, ultra-high strength steels (UHSS) have been widely used. However, with such a high strength level, UHSS are very sensitive to the hydrogen that could be
T.C. Chen +5 more
openaire +1 more source
Martensitic transformations in high-strength steels at aging
Russian Metallurgy (Metally), 2011The effect of heat treatment and elastic stresses on the texture of maraging NiTi-steels is studied. The interruption of the decomposition of martensite at the early stages is shown to be accompanied by the γ → α transformation, which proceeds upon cooling from the aging temperature and under elastic (σ < σ0.2) tensile stresses.
V. V. Berezovskaya, O. A. Bannykh
openaire +1 more source
Microstructural Characterization of Ultra-High Strength Martensitic Steels
Practical Metallography, 2018Abstract In the development of steels with increasing strength and toughness, ultra-high strength steel grades with a martensitic microstructure are gaining more importance. From the martensitic transformation product, however, strength-specific quantities derived from the former austenite grain cannot be accessed conveniently.
R. Esterl +4 more
openaire +1 more source
Nanoscale Analyses of High-Nickel Concentration Martensitic High-Strength Steels
Metallurgical and Materials Transactions A, 2013Austenite reversion in martensitic steels is known to improve fracture toughness. This research focuses on characterizing mechanical properties and the microstructure of low-carbon, high-nickel steels containing 4.5 and 10 wt pct Ni after a QLT-type austenite reversion heat treatment: first, martensite is formed by quenching (Q) from a temperature in ...
Dieter Isheim +3 more
openaire +1 more source
Mechanisms of steam oxidation in high strength martensitic steels
International Journal of Pressure Vessels and Piping, 2007Abstract The oxidation resistance of 9–12% chromium steels in steam-containing environments simulating the service conditions of steam power plant has been investigated for exposure times ranging from 1 h up to 10,000 h. The time-dependent changes in the complex structures of the scales were determined using optical microscopy.
P.J. Ennis, W.J. Quadakkers
openaire +1 more source
Hydrogen trapping in high strength 0Cr16Ni5Mo martensitic stainless steel
Journal of Central South University, 2015Hydrogen trapping behavior has been investigated by means of thermal desorption spectroscopy (TDS) for a high strength steel after it was tempered at the temperatures of 430 °C, 500 °C and 520 °C, respectively. The loss of ductility was characterized by slow strain rate test (SSRT) and microscopic observation.
Yong-wei Sun, Ji-zhi Chen, Jun Liu
openaire +1 more source
Advanced High Strength Martensitic Stainless Steels for High Pressure Equipment
Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition, 2018Maraging stainless steels offer a large panel of high strength materials with good ductility and stress corrosion cracking resistance. Their mechanical properties compared to conventional 15-5 PH and 17-4 PH martensitic stainless steels show much better yield strength / toughness compromise for yield strength exceeding 1300 MPa.
J. M. Lardon, T. Poulain
openaire +1 more source
Microstructure control for high strength 9Cr ferritic–martensitic steels
Journal of Nuclear Materials, 2012Abstract Ferritic–martensitic (F–M) steels with 9 wt.%Cr are important structural materials for use in advanced nuclear reactors. Alloying composition adjustment, guided by computational thermodynamics, and thermomechanical treatment (TMT) were employed to develop high strength 9Cr F–M steels.
L. Tan +4 more
openaire +1 more source
High Temperature Strength of Three ODS Ferritic/ Martensitic Steels
Key Engineering Materials, 2007Oxide dispersion strengthened (ODS) materials is leading candidates for blanket/first-wall structures of the fusion reactor. ODS materials for structure application in fusion rector would allow to increase the operating temperature to approximately 650.
Han Ki Yoon, Akihiko Kimura
openaire +1 more source