Results 51 to 60 of about 2,934 (216)

Hydrogen diffusion in 0.2–0.4wt% carbon martensitic and martensitic-austenitic advanced high-strength steels

Next Materials
Hydrogen-tolerant steels are a central part of enabling the green transition and utilisation of steels with ever higher strength levels. However, hydrogen embrittlement is a critical challenge for advanced high-strength steels (AHSSs) with martensitic ...
Niko Aho, Renata Latypova, Sumit Ghosh, Pekka Kantanen, Mahesh Somani, Jukka Kömi, Sakari Pallaspuro   +6 more
doaj   +1 more source

Laser heat treatment of martensitic steel and dual-phase steel with high martensite content

Materials Science and Engineering: A, 2019
Laser heat treatment of galvanised steels with a martensite content superior to 80% were performed on a 1 cm wide area over an extensive temperature range [620 K - 1350 K]. The material softening induced is studied through uniaxial tensile testing and SEM microstructural observation. A treatment temperature close to Ac3 yields a massive increase in the
Lapouge, Pierre, Dirrenberger, Justin, Coste, Frédéric, Schneider, Matthieu   +3 more
openaire   +4 more sources

Influence of Steel Recycling on Phase Transformation in Medium‐Manganese Third‐Generation Advanced High‐Strength Steels

steel research international, EarlyView.
On the pathway to climate‐neutral steel production, recycling fractions will necessarily increase over time. Since alloying elements will enrich progressively, as they cannot be removed economically from the melt, processes need to be adjusted.
Anindita Chakraborty, Radhakanta Rana, Ulrich Krupp, Alexander Gramlich   +3 more
wiley   +1 more source

Recycling‐Induced Copper Contamination of a 42CrMo4 Quench and Tempering Steel—Scaling and Susceptibility to Hot Shortness

steel research international, EarlyView.
In this study, the susceptibility to copper‐induced hot shortness of the alloy 42CrMo4 is investigated by different hot tensile tests, as well as by a detailed analysis of the formed oxidation products. While an enrichment of metallic copper and a penetration of the grain boundaries are observed, no critical reduction of the tensile test properties can
Alexander Gramlich, Sindokht Shayan, Nima Babaei, Aleksei Klubakov, Lena Patterer, Ulrich Krupp, Hauke Springer   +6 more
wiley   +1 more source

Effects of Ce addition on inclusion modification in martensitic stainless steel

Materials Research Express
The control of inclusion features, i.e., chemical composition, distribution, quantity, and size, is in high demand for stainless steels to achieve good surface quality, pitting corrosion resistance, and mechanical properties.
Lei Xing, Haiyan Wang, Xueyun Gao, Fangcheng Tian, Hongling Lin, Haixin Yin   +5 more
doaj   +1 more source

Alteration of Phase Transformation Behavior and Prior Austenite Grain Structure Due to Elevated Tramp Element Concentrations in a Hypoeutectoid Steel

steel research international, EarlyView.
The phase transformation behavior of a hypoeutectoid steel is studied in comparison with alloys containing higher concentrations of tramp elements, simulating high recycling rates. The examination of microstructures reveals that the tramp elements facilitate the formation of displacive phases along with retained austenite.
Lukas Hatzenbichler, Marek Gocnik, Phillip Haslberger, Matthew Galler, Andreas Stark, Oleksandr Glushko, Jozef Keckes, Ronald Schnitzer   +7 more
wiley   +1 more source

Method of Determining the Main Features of Magnetic Ferromagnetic Materials

The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, 2012
The purpose of this paper is to present a method for determining the main magnetic features such as magnetic induction B, magnetization M, the coercive magnetic field Hc, permeability μ, using hysteresis cycle chart.
Livia GHEORGHIEŞ, Ovidiu DIMA
doaj  

Revisiting rapid tempering of martensitic steel: the key role of tempering time over heating rate in carbide refinement and precipitation strengthening

Journal of Materials Research and Technology
Rapid tempering process can effectively improve the mechanical properties of martensitic steels such as strength, fracture toughness and impact toughness, which is mainly attributed to the promoted density and refined grain size of carbides. However, the
Baoqin Luo, Wenqi Mao, Yankang Zhao, Lijia Zhao, Hao Gao, Wenbin Ma, Shaolong Sheng, Nokeun Park, Pinaki Prasad Bhattacharjee, Qiang Wang   +9 more
doaj   +1 more source

Influence of Higher Tramp Element Level on the Weldability of Automotive Steels

steel research international, EarlyView.
The use of green recycled steels is constantly expanding in the automotive industry. The increase in tramp elements resulting from the recycling of steel is problematic. Tramp elements can lead to a negative influence on the weldability. To understand the influence, the welding properties of three green steels are characterized. The potential limits of
Elias Gebhard Vogt, Patrick Veyel, Lars Gebel, Christian Meyer, Robert Thomas, Michael Thomas, Christoph Herrmann   +6 more
wiley   +1 more source

Superior stress relaxation resistance of 2.2 GPa martensitic steels and the effect of vanadium

Journal of Materials Research and Technology
For ultra-high-strength steels subjected to sustained loading, stress relaxation resistance is a core indicator determining their long-term service reliability.
Siming Huang, Jianping Ouyang, Liejun Li, Songjun Chen, Xianqiang Xing, Zhuoran Li, Haixiao Ye, Zhengwu Peng, Zhichao Luo   +8 more
doaj   +1 more source