Results 101 to 110 of about 13,933 (129)

Alloy Qualification for Producing Quench and Tempered Plate Steels with Extra‐Heavy Gage

steel research international, EarlyView.
This study develops alloy concepts for ultraheavy steel plates (>100 mm) with ≥690 MPa yield strength. Through dilatometry and Jominy testing, the effects of Mo, Ni, and B on hardenability are quantified. A synergy between 0.5% Mo and 0.5%–1.0% Ni ensures core strength at low cooling rates, while boron microalloying suppresses ferrite and promotes ...
Xabier Azpeitia, Unai Mayo, Nerea Isasti, Eric Detemple, Hardy Mohrbacher, Pello Uranga   +5 more
wiley   +1 more source

HWTS 50 Tool Steel Tailored for Laser Powder Bed Fusion: Sliding Wear of Bare Surfaces and Nitriding Response in Comparison with 18Ni300 and AISI H13

steel research international, EarlyView.
This work investigates the wear resistance and nitriding behavior of PBF‐LB/M‐processed Osprey HWTS 50, a lean hot work tool steel. Three heat treatment conditions are compared to conventional wrought H13, H11, and PBF‐LB/M 18Ni300. The study highlights HWTS 50's enhanced nitrogen diffusion, deeper nitriding hardness depth, and comparable or improved ...
Jonathan Hann, Giorgia Lupi, Sylvain Dossin, Riccardo Casati, Mandanà Moshiri, Arne Röttger, Faraz Deirmina   +6 more
wiley   +1 more source

Room-temperature photo-induced martensitic transformation in a protein crystal

IUCrJ, 2019
Martensitic transformations are the first-order crystal-to-crystal phase transitions that occur mostly in materials such as steel, alloys and ceramics, thus having many technological applications.
Steven Dajnowicz, Patricia S. Langan, Kevin L. Weiss, Ilia N. Ivanov, Andrey Kovalevsky   +4 more
doaj   +1 more source

Minimization of Porosity in E11018‐G Low‐Alloyed Steel Processed by Laser Powder Directed Energy Deposition

steel research international, EarlyView.
The processability of the E11018‐G by laser powder directed energy deposition (LP‐DED) is investigated. The effects of powder moisture, ambient humidity, and laser remelting on LP‐DED parts’ porosity are shown. A strong influence of the atomizing gas is observed.
Josu López‐López, Florencia Schiopetto, Itziar Ruiz‐Moraza, Iñigo Pérez‐Casero, Ernesto Urionabarrenetxea, Carmen Luno‐Bilbao, Angela Veiga, Sergio Ausejo   +7 more
wiley   +1 more source

Degenerate Structure of Transformation Twins and Estimation of Dislocation Density in Martensite Crystals [PDF]

, 2019
In the dynamic theory of martensitic transformations, the wave mechanism of controlling martensite crystal growth is determined by the superposition of wave beams of quasi-longitudinal (or longitudinal) waves carrying the "tensile-compression ...
Chashchina, V. G., Kashchenko, M. P., Kashchenko, N. M.   +2 more
core  

Comparison of Intergranular Corrosion Resistance and Hardness between Nitrogen and Carbon Martensites in Stainless Steels

steel research international, EarlyView.
By applying solution heat treatment after plasma nitriding, followed by requenching and tempering, researchers successfully obtained nitrogen‐rich martensite on AISI 409. This study compares the intergranular corrosion resistance and hardness of nitrogen‐rich martensite in AISI 409 with carbon‐rich martensite in AISI 420.
Pedro Victorio Caetano Abrantes Quadros, Elisiane Maria Berton, Paulo César Borges   +2 more
wiley   +1 more source

Twin Toughening‐Driven Martensitic Transformation Strategy Synergistic Improvement for Plasticity‐Thermal Shock Resistance of (Hf─Zr─Ti)C Ceramic Coating in Severe Thermal Environments

Advanced Science
The inherent brittleness and insufficient thermal shock resistance of ultra‐high temperature ceramic (UHTC) in severe thermal environments (above 2000 °C) remain significant challenges.
Jiachen Li, Yulei Zhang, Yanqin Fu, Tao Li, Jian Zhang, Deyu Yang, Lingfei Cao, Fanyu Lu, Junhao Zhao, Junshuai Lv, Hejun Li   +10 more
doaj   +1 more source

Numerical Prediction of Deformation‐Induced Martensitic Transformation in Cold‐Sprayed Austenitic Stainless Steel

steel research international, EarlyView.
Cold spray deposition of stainless steel (grade: SS304) is evaluated for marine applications, with emphasis on martensitic transformation during impact. Analytical modeling, simulations, and experiments reveal that helium‐assisted spraying of fine powders promotes cooling below the martensitic start temperature, enabling up to ≈40% austenite to ...
Cal Vin Wong, K. R. Ramkumar, Sougata Roy, Victor K. Champagne, John J. Lee   +4 more
wiley   +1 more source

Influence of Laser Powder‐Based Directed Energy Deposition and Heat Treatment on the Thermal Conductivity of Cold‐Work Tool Steel X65MoCrWV3‐2

steel research international, EarlyView.
The studied X65MoCrWV3‐2 press hardening tool steel, produced via laser‐based direct energy deposition DED‐LB/M, exhibits a 15‐20% lower thermal conductivity than its conventionally produced equivalent when heat‐treated to operational hardness. The microstructural evolution during the employed direct tempering leads to anisotropic thermal transport, as
Julia Hahn, Christoph Escher, Sebastian Weber, Santiago Benito   +3 more
wiley   +1 more source

Hysteresis Phenomena and Their Modelling in Martensitic Transformation Thermodynamics

Успехи физики металлов, 2015
In the present review paper, we show that a successful description of the irreversible evolution of macroscopic variables during the martensitic transformations caused by hysteresis is possible with using a special type of differential equations with the
O. A. Likhachev, Yu. M. Koval
doaj   +1 more source