Results 31 to 40 of about 2,269 (228)

Effect of Prior Cold Reduction of C–Si–Mn Hot-Rolled Sheet on Microstructures and Mechanical Properties after Quenching and Partitioning Treatment

Metals, 2022
This paper studies the microstructures and mechanical properties of quenching and partitioning (Q&P) samples prepared with 35% and 75% cold reduction sheets at an annealing temperature of 810 °C (intercritical temperature).
Yuanyao Cheng, Gang Zhao, Deming Xu, Siqian Bao   +3 more
doaj   +1 more source

Distinct Microstructural Characteristic Lengths Defining Notch Fatigue Crack Initiation and Propagation, and Defect Tolerance in Advanced Steels

Advanced Engineering Materials, EarlyView.
Schematic representation of modes of microcrack nucleation, growth and temporary arrestment at different boundaries, with the criteria for crack propagation in three scenarios: (1) large notch, (2) defect/small sharp notch, and (3) long crack. This work revisits and integrates results on the fatigue behavior of advanced bainitic steels (in particular ...
Lucia Morales‐Rivas
wiley   +1 more source

INFLUENCE OF ABNORMAL AUSTENITE GRAIN GRAIN GROWTH IN QUENCHED ABNT 5135 STEEL [PDF]

Tecnologia em Metalurgia, Materiais e Mineração, 2015
Grain size in the steels is a relevant aspect in quenching and tempering heat treatments. It is known that high austenitizing temperature and long time provide an increase in austenitic grain sizes.
Camila de Brito Ferreira , Paulo José Modenesi , Dagoberto Brandão Santos   +2 more
doaj   +1 more source

Insights into the stability of retained austenite during wear

Philosophical Magazine, 2022
Transformation-induced plasticity mechanism is a very interesting phenomenon wherein a certain amount of austenite, which is thermally stable at room temperature but can be transformed to martensite during deformation, is retained in the microstructure.
Neoga, Suruj Protim, Lodh, Arijit, Karmakar, Anish, Nair, Akhil G., Dasgupta, Arup, Bakshi, Subhankar Das, Das, Sourav   +6 more
openaire   +2 more sources

Investigating the Effect of Inclination Angle and the Influence of Scan Parameters on the Appearance and Thermal and Mechanical Properties of Filigree Tension Rods of LPBF‐Manufactured NiTi Shape‐Memory Alloys

Advanced Engineering Materials, EarlyView.
This article investigates the dependence of the properties on the manufacturing orientation in the form of the inclination angle to the build plate of LPBF‐fabricated NiTi rods with a diameter of 150–220 µm. Metallographic, chemical, thermal, and mechanical characterization show behavior under identical manufacturing conditions that ranges from ...
Sandra Herzig, Michael Werner, Christian Rotsch   +2 more
wiley   +1 more source

Influence of Parameters of Quenching and Partitioning Process on Microstructure and Fraction of Retained Austenite

Journal of Advanced Materials in Engineering, 2015
Certain amount of retained austenite can increase ductility of steels because of the TRIP phenomenon during plastic deformation. One method for achieving this is partitioning of carbon into austenite to stabilize it at room temperature. The quenching and
A. Shirali, A. Honarbakhsh Raouf, S. Bazzaz Bonabi   +2 more
doaj   +2 more sources

Effects of Temperature and Time of Isothermal Holding on Retained Austenite Stability in Medium-Mn Steels

Applied Sciences, 2018
Effects of isothermal holding time and temperature on the stability of retained austenite in medium manganese bainitic steels with and without Nb microaddition were investigated.
Adam Grajcar, Paweł Skrzypczyk, Aleksandra Kozłowska   +2 more
doaj   +1 more source

Effects of the microstructure and retained/reversed austenite on the corrosion behavior of NiCrMoV/Nb high-strength steel

npj Materials Degradation, 2023
A comparison of microstructure and corrosion performance has been made between NiCrMoV/Nb steel under different heat treatments in artificial seawater. The microstructures as well as the volume fraction of austenite strongly affect corrosion resistance ...
Chao Hai, Yuetong Zhu, Endian Fan, Cuiwei Du, Xuequn Cheng, Xiaogang Li   +5 more
doaj   +1 more source

Influence of TiC and TiN Ceramic Reinforcements on the Microstructure, Thermal Expansion Behavior, and Tensile Properties of Invar 36 Manufactured by Laser Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
This study examines Invar composites reinforced with titanium carbide (TiC) and titanium nitride (TiN) using laser powder bed fusion (LPBF). It presents the influence of reinforcements on microstructure, tensile properties, and thermal expansion. Results show that TiC effectively strengthens Invar while maintaining low thermal expansion, whereas TiN ...
Ayodeji Nathaniel Oyedeji, Natasha Sacks, Johannes Pötschke, Björn Matthey   +3 more
wiley   +1 more source

The Role of Retained Austenite and Its Carbon Concentration on Elongation of Low Temperature Bainitic Steels at Different Austenitising Temperature

Metals, 2018
The influence of austenitising temperature on the tensile properties of low temperature bainitic steel was investigated. With the increasing austenitising temperature, a significant change of elongation was found between 850 and 950 °C, which was ...
Baoqi Dong, Tingping Hou, Wen Zhou, Guohong Zhang, Kaiming Wu   +4 more
doaj   +1 more source