Results 151 to 160 of about 887 (181)

Precipitation behaviors of X80 acicular ferrite pipeline steel

International Journal of Minerals, Metallurgy, and Materials, 2011
The precipitation behaviors of X80 acicular ferrite pipeline steel were investigated by using transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS). The results show that dendritic precipitates in the as-cast steel slabs precipitate mainly in grain boundaries, and these dendritic precipitates dissolve and re-precipitate to two
Ai-min Zhao, Yan Wang, Yin-li Chen, Di Tang, Xu-tao Gao, Bi-qiang Zuo   +5 more
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Systematic investigation of acicular ferrite formation on laboratory scale

Materials Science and Technology, 2016
By increasing the amount of acicular ferrite (AF) in the microstructure, steel toughness can be improved significantly. The steel composition, cooling rate, non-metallic inclusions and austenite grain size have a strong influence on the formation of AF.
D. Loder, S. K. Michelic
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Preparation of Acicular Barium Ferrite Particles and Their Magnetic Properties

IEEE Translation Journal on Magnetics in Japan, 1985
Methods for producing acicular barium ferrite particles for use in coated tape media were studied, and their magnetic and other properties were investigated. Acicular ?-FeOOH particles were dispersed in a BaCl 2 solution, and NaHCO 3 added to precipitate BaCO 3 on the particle surfaces. After washing and addition of B 2 O 3 , P 2 O 5 , or Bi 2 O 3 ,
M. Sugimoto, Y. Arai, H. Harada, T. Nukui   +3 more
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Optimization-heuristic of mechanical properties of acicular ferrite steel

Materials Science and Engineering: A, 2018
Abstract This paper presents two algorithms, Simulated Annealing and Iterated Local Search. Both metaheuristics use a neighborhood hybrid structure to evaluate their effectiveness and maximize the mechanical strength of microalloyed steel. Tests show that the best metaheuristic for this type of problem, which makes use of a neighborhood structure and
Marco Antonio Cruz-Chávez, Sergio A. Serna-Barquera, Jazmín Juárez-Chávez, R.J. Romero, Martín H. Cruz-Rosales, Bernardo Campillo-Illanes   +5 more
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Challenge of mechanical properties of an acicular ferrite pipeline steel

Materials Science and Engineering: A, 2006
In modern industry, the developing tendency and prospect for productions of the oil and gas pipeline steels is to further improve the strength and toughness by advanced manufacture process of the thermo-mechanical control process (TMCP) to refine microstructure.
Fu-Ren Xiao, Bo Liao, Yi-Yin Shan, Gui-Ying Qiao, Yong Zhong, Chunling Zhang, Ke Yang   +6 more
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A Mössbauer effect study on the acicular cobalt ferrite particles

Journal of Applied Physics, 1994
The causes of the coercivity enhancement and the coercivity instability of acicular cobalt ferrite particles containing 0–9.2 wt % Fe2+ ions under the influence of magnetic field and temperature were investigated by means of transverse magnetic field annealing, torque, and Mössbauer experiments.
J. G. Na, D. H. Han, J. G. Zhao, H. L. Luo   +3 more
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Scale-Bridging Characterization of Acicular Ferrite Nucleation

AM&P Technical Articles
Abstract This study presents a comprehensive scale-bridging characterization approach to investigate acicular ferrite nucleation in electron beam welded S355 ML steel, demonstrating the critical role of titanium oxide particles in promoting fracture-resistant microstructures for offshore wind monopile applications.
Adrian Herges, Christoph Pauly, Frank Mücklich, Sebastian Scholl   +3 more
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The nature of acicular ferrite in HSLA steel weld metals

Journal of Materials Science, 1982
In this paper, the nature of the fine interlocking acicular ferrite microstructure in HSLA steel weld metals is investigated. The results strongly suggest the acicular ferrite is comprised of intragranularly nucleated Widmanstatten ferrite. Further, it is shown that the active nucleation sites for this ferritic product are weld metal inclusions ...
R. A. Ricks, P. R. Howell, G. S. Barritte   +2 more
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Acicular ferrite morphologies in a medium-carbon microalloyed steel

Metallurgical and Materials Transactions A, 2001
The influence of time and isothermal transformation temperature on the morphology of acicular ferrite in a medium-carbon microalloyed steel has been studied using optical and transmission electron microscopy (TEM). This study has been carried out with the analysis of the microstructures obtained with one- and two-stage isothermal treatments at 400 °C ...
I. Madariaga, I. Gutierrez, H. K. D. H. Bhadeshia   +2 more
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Effect of Lanthanum Content on the Formation of Acicular Ferrite

Metallurgical and Materials Transactions B, 2022
Yumin Xie, Mingming Song, Hangyu Zhu, Jianli Li, Guojun Ma, Zhengliang Xue   +5 more
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