Results 61 to 70 of about 8,297 (199)

OXYGEN SEGREGATION IN 32° [001] MOLYBDENUM TILT GRAIN BOUNDARY II. ENTHALPIES OF SEGREGATION DETERMINATION FROM AES AND GRAIN BOUNDARY GROOVES MEASUREMENTS

, 1988
On présente des mesures de concentration d'oxygène dans un joint de flexion 32° autour de [001] du molybdène, en fonction de la température de trempe et des mesures de tension intergranulaire en fonction de la concentration intergranulaire, pour le même ...
T.N. NOWICKI, M. BISCONDI
core   +1 more source

Effect of Nb Segregation on the Stability of the FeΣ3(111) Grain Boundary by First Principles Investigation

Metals
The segregation of niobium (Nb) at the FeΣ3(111) grain boundary and its influence on interfacial cohesion were investigated via spin-polarized density functional theory calculations.
Lei Zhang, Xiaoyang Luo, Jiawei Shen, Jie Sheng, Xuefeng Lu, Xingchang Tang   +5 more
doaj   +1 more source

An atomistic study of grain boundary segregation and cracking

, 1984
A Monte Carlo model is applied to study a Σ = 5 (310) fcc tilt boundary structure and impurity segregation to this boundary. The Johnson-type potential functions are used to express atomic interactions for two binary alloys of NiCu and CuSb systems ...
Chang, H. K., Weidman, R. S., Lee, J. K.
core   +1 more source

Grain Boundary Segregation: Equilibrium And Non-Equilibrium Conditions

, 2002
The segregation of Bi to Cu grain boundaries can be characterized as either equilibrium or non-equilibrium segregation. The experimental conditions of the segregation process determine the type of segregation behavior that is achieved.
Kempshall, B. W., Prenitzer, B. I., Giannuzzi, L. A.   +2 more
core   +2 more sources

Atomic-scale quantification of grain boundary segregation in nanocrystalline material

, 2014
Grain boundary segregation leads to nanoscale chemical variations that can alter a material's performance by orders of magnitude (e. g., embrittlement).
Zaefferer, S., Li, Y., Raabe, D., Goto, S., Li, Y. J., Herbig, M., Choi, P., Choi, Pyuck-Pa   +7 more
core   +1 more source

Segregation of Phosphorus and Silicon at the Grain Boundary in Bcc Iron via Machine-Learned Force Fields

Crystals
The study of the effects of impurity on grain boundaries is a critical aspect of materials science, particularly when it comes to understanding and controlling the properties of materials for specific applications.
Miroslav Černý, Petr Šesták
doaj   +1 more source

Enhancing the strength-ductility synergy in CoCrNi medium-entropy alloys via grain boundary segregation engineering

Virtual and Physical Prototyping
The unique solidification behaviour in metal additive manufacturing (AM), can lead to hot cracking, significantly compromising the mechanical properties of the alloys. In this study, grain boundary segregation engineering was employed, using boron (B) as
Bowen Wang, Cunliang Pan, Zhengyi Jin, Hongmei Zhu, Chao Lu, Julia K. Hufenbach, Xiaoqiang Li, Konrad Kosiba   +7 more
doaj   +1 more source

Estudo do efeito das temperaturas de austenitização e de revenido na resistência e tenacidade do aço SAE 15B30 [PDF]

, 2008
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-graduação em Ciência e Engenharia de MateriaisNeste trabalho estudou-se o efeito da temperatura de austenitização e da temperatura de revenido, bem como
Preti, Itamar
core  

Ultra fast grain boundary segregation in hot deformed nickel

, 2012
International audienceHot deformation of nickel alloys (500-800 degrees C) can lead to a dramatic loss of mechanical properties due to sulfur grain boundary segregation. In this work, both equilibrium and non-equilibrium sulfur grain boundary segregation
Allart, Marion, Christien, Frédéric, Le Gall, René   +2 more
core   +1 more source

Understanding the extrusion microstructures in Mg alloys due to solute segregation

Journal of Magnesium and Alloys
Grain boundary segregation (GBS) of solutes influences the grain size, texture, and strength of Mg wrought alloys. So far, solutes’ GBS in Mg has mostly been investigated by qualitative experimental observations.
Dongfang Shi, Ziliang Lu, Yunhao Fan, Yinghang Liu, Xiaoqin Zeng, Leyun Wang   +5 more
doaj   +1 more source