Effect of molybdenum on grain boundary segregation in

Effect of molybdenum on grain boundary segregation in

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Grain boundary segregation engineering in as-sintered

The present work clearly identifies the effect of typical grain boundary segregation elements on the fracture behavior of molybdenum materials. Therefore, combining mechanical properties, such as the DBTT, with the grain boundary chemistry on the nanometer

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Effect of grain boundary segregation of interstitial

TY - JOUR T1 - Effect of grain boundary segregation of interstitial elements on hallpetch coefficient in steels AU - Takaki, Setsuo AU - Akama, Daichi AU - Nakada, Nobuo AU - Tsuchiyama, Toshihiro PY - 2014/1/22 Y1 - 2014/1/22 N2 - The yielding behavior of ...

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Grain boundary segregation and intergranular fracture

Measurements have been made of the activation energy for oxygen segregation to grain boundaries in the binary molybdenum-oxygen alloys. The influence of carbon additions on the level of oxygen segregation has also been determined.

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Grain boundary segregation in recrystallized

Refractory Metals" & Hard Materials 11 (1992) 175-180 Grain Boundary Segregation in Recrystallized Molybdenum Alloys and its Effect on Brittle Intergranular Fracture A. V. Krajnikov, A. S. Drachinskiy & V. N. Slyunyaev Institute for Problems of Material Science ...

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Segregation of oxygen to molybdenum grain boundary

Segregation of oxygen atoms to molybdenum grain boundary. Each dot represents an atom. Note that the grain boundaries are visible in the Mo 3+ image because of an associated local change in the curvature of the specimen surface that leads to a corresponding local change in magnification.

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Grain boundary segregation

J. Phys. F: Metal Phys., 10(1980)1043-64, Printed in Great Britain CRITICAL ASSESSMENT ARTICLE Grain boundary segregation M P Seah Division of Chemical Standards, National Physical Laboratory, Teddington, Middlesex, England. UK Abstract.

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The grain-boundary segregation of phosphorus and

21/2/2020· Grain-boundary segregation in the Fe-P-C system has been examined using Auger Electron Spectroscopy on specimens which were cooled slowly to various intermediate temperatures after equilibration at 600 C, and then quenched prior to examination. The aim was to monitor the segregation of phosphorus ...

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Effects of the alloying elements Ti, Nb, Mo and V on the

Investigations have been performed on the effects of the alloying elements Ti, Nb, Mo and V on the grain boundary segregation of phosphorous in iron and steels. The methods are AES analysis of grain boundaries on intergranular fracture faces and fieldion ...

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Effect of molybdenum on grain boundary segregation in

In this paper, the effect of molybdenum on the grain boundary segregation of other elements was studied in Incoloy 901 superalloy. Initially, five alloys were prepared with different ...

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Atom probe study of grain boundary segregation in

14/3/2020· - Highlights: First study of grain boundary segregation in molybdenum by atom probe Site-specific preparation technique by FIB and TEM successfully developed Grain boundary segregation of oxygen, nitrogen and potassium found Segregation in former

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The Effect of Molybdenum on the Grain Boundary

STP1366: The Effect of Molybdenum on the Grain Boundary Segregation of Chromium Exhibited by Austenitic Stainless Steels after Neutron Irradiation in a BWR Author Information: Goodwin, CC Research assistant & Professor of Physical Metallurgy, Power ...

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Grain boundary segregation and intergranular fracture in

1/2/1996· Roles of molybdenum, silicon or aluminum in ferrite on grain boundary segregation and hence on intergranular fracture have been investigated by using Auger electron spectroscopy (AES) and tensile test. Competitive segregation between sulfur and carbon or nitrogen, which caused the decrease below 700°C of sulfur content at the grain boundaries, was observed in the pure iron. The

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APFIM Characterization of Grain Boundary Segregation in Titanium Carbide-Doped Molybdenum

JOURNAL DE PHYSIQUE IV Colloque C5, supplkment au Journal de Physique 111, Volume 6, septembre 1996 APFIM Characterization of Grain Boundary Segregation in Titanium Carbide-Doped Molybdenum M.K. Miller and H. Kurishita* Microscopy

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Influence of vanadium on grain boundary segregation of

A similar effect is noted when the molybdenum concentration in the steel exceeds approximately 0-7 wt%; there is precipitation of Mo2C and consequent depletion of molybdenum in solid solution leading to grain boundary segregation of et ai

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Grain boundary segregation and intergranular fracture

Roles of molybdenum, silicon or aluminum in ferrite on grain boundary segregation and hence on intergranular fracture have been investigated by using Auger electron spectroscopy (AES) and tensile test. Competitive segregation between sulfur and carbon or nitrogen, which caused the decrease below 700°C of sulfur content at the grain boundaries, was observed in the pure iron. The intergranular ...

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On grain boundary segregation in molybdenum materials

In molybdenum (Mo) based materials in particular, grain boundary segregation engineering may enable a significant improvement of their mechanical properties. Mo is a refractory metal applied in numerous high temperature structural, electronic, and coating applications which are demanding a low thermal expansion coefficient as well as high thermal and electrical conductivity.

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Grain Boundary Segregation in Metals Pavel Lejcek

Because grain boundaries form a continuous network throughout such materials, their properties may limit their practical use. One of the serious phenomena which evoke these limitations is the grain boundary segregation of impurities. It results in the loss of

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GRAIN BOUNDARY SEGREGATION OF BORON IN

Abstract: Hy means of particle tracking autoradiography it has been found that there exists a strong tendency of equilibrium grain boundary segregation of Bin Ni with binding energy of 18±2 kJ/mol. In Ni-Mo-B alloys the segregation is alleviated. For additions of 0.5% ...

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Impact of solute-solute interactions on grain boundary

work, we focus on the effect of C, B, O, Fe, and Hf interactions in Mo on grain boundary (GB) segregation and cohesion within an ab initio framework. We show that segregation energies reveal only ...

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Computational study of metallic dopant segregation and embrittlement at molybdenum grain

Full length article Computational study of metallic dopant segregation and embrittlement at molybdenum grain boundaries Richard Tran, Zihan Xu, Naixie Zhou, Balachandran Radhakrishnan, Jian Luo, Shyue Ping Ong* Department of NanoEngineering, University of

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Atom probe study of grain boundary segregation in

We also show that the entropy of grain boundary segregation is a very important quantity which cannot be neglected in thermodynamic considerations as it plays a crucial role, for example, in ...

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Surface and Grain Boundary Segregation on and in Iron

Effect of Metallurgical Factors on Grain Boundary Segregation of Solute Atoms in Iron. Materials Transactions, JIM. 1999, Vol.40, No.6, p.463. Pavel Lejček, Mojmír Šob, Václav Paidar. Interfacial segregation and grain boundary embrittlement: An overview and

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The effect of nitrogen on the co-segregation with molybdenum

Research Letters South African Journal of Science 104, September/October 2008 393 The effect of nitrogen on the co-segregation with molybdenum in a Fe3.5wt%MoN(100) single crystal W.A. Jordaana,b, J.J. Terblansa* and H.C. Swarta Introduction During the

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Effects of Interaction between Point Defects and Solutes

Local Segregation at the Grain Junction: Elastic Singularity and its Effect on Radiation Embrittlement p.153 Effects of Interaction between Point Defects and Solutes on Grain Boundary Segregation and Migration p.157 Vacancy Formation and Vacancy-Induced ...

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Effect of Grain Boundary Segregation of Interstitial

Nitrogen does not have a significant effect on the HallPetch coefficient. The results of three-dimensional (3D) atom probe analysis indicated that carbon has 34 times greater segregation potential in comparison with nitrogen.

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On grain boundary segregation in molybdenum materials

Furthermore, in industrially processed and recrystallized molybdenum sheets grain boundary segregation of oxygen, nitrogen and potassium is successfully detected close

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Effect of Sintering Atmosphere on Grain Boundary

To investigate the donor segregation in grain boundary regions and its effect on grain growth in SrTiO 3, SrTiO 3 powder compacts were doped with Nb 2 O 5 and sintered in air or in hydrogen. The Nbdoped SrTiO 3 sintered in air did not show any detectable Nb segregation at the grain boundary region while an appreciable segregation was observed in the spacecharge region of the sample ...

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Grain boundary segregation of phosphorus and

AbstractPhosphorus and molybdenum segregation to grain boundaries in a commercial grade A533B steel subjected to a variety of heat treatments has been examined using a field emission gun scanning transmission electron microscope (FEGSTEM) with energy ...

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Grain boundary segregation of phosphorus and

Grain boundary segregation of phosphorus and molybdenum during aging at 540 C after quenching from 980 C is examined for a P-doped 2.25Cr1Mo steel using Auger electron ...

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The Effect of Molybdenum on the Grain Boundary

An explanation of this observation is proposed, which is based on the non-equilibrium segregation (NES) theory of grain boundary segregation. NES model predictions for the radiation-induced segregation of chromium and molybdenum in an austenitic matrix are

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Effect of molybdenum on grain boundary segregation

Read "Effect of molybdenum on grain boundary segregation in Incoloy 901 superalloy, materials & design" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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Applied Thermodynamics: Grain Boundary Segregation

Applied Thermodynamics: Grain Boundary Segregation Pavel Lejček 1,*, Lei Zheng 2, Siegfried Hofmann 3 and Mojmír Šob 4,5,6 1 Laboratory of Nanostructures and Nanomaterials, Institute of Physics, Academy of Sciences of the ...

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