Results 311 to 320 of about 102,033 (344)

Coherent Precipitate Strengthening Mechanisms in MgO

1975
MgO containing magnesia ferrite particles is a model system for the study of the interaction between dislocations and second phase particles in ceramic materials. Therefore, several investigations have been performed on two-phase MgO under this aspect [1–7]. Magnesia ferrite crystalizes as inverse spinel with disorder [18].
B. Reppich, H. Knoch
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Development of wrought precipitation strengthened IN939 superalloy

Materials Science and Technology, 2012
The potential of cast IN939 superalloy to be converted to wrought alloy has been explored in the present work. For this objective, bars of cast alloy were rolled under different conditions and then subjected to various heat treatment cycles. The results indicated that the yield strength, ultimate tensile strength and ductility of the wrought IN939 ...
M R Jahangiri, H Arabi, S M A Boutorabi
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Precipitation strengthening in aluminum-zirconium-vanadium alloys

Journal of Alloys and Compounds, 2017
Abstract Atom probe tomography (APT) and high resolution transmission electron microscopy (HRTEM) were used to study the co-precipitation and coarsening mechanisms of Al 3 (Zr 1 -x ,V x ) precipitates formed in Al-Zr-V alloys. The strengthening mechanism that is operative in properly aged Al-Zr-V alloys are determined, and the antiphase boundary ...
Yangyang Fan, Makhlouf M. Makhlouf
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Precipitation strengthening of the aluminum alloy AA6111

Metallurgical and Materials Transactions A, 2003
There is an increasing use of aluminum alloy sheet in automotive applications due to the desire to decrease vehicle weight. The current study provides a detailed quantitative study on precipitation strengthening in AA6111, which is the alloy of choice in North America for exposed body panels.
X. Wang, J. D. Embury, W. J. Poole, S. Esmaeili, D. J. Lloyd   +4 more
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Strengthening of Sapphire by Precipitates Containing Titanium

Journal of the American Ceramic Society, 1967
Sapphire single crystals alloyed with 0.5 cation % Ti and aged at 1500° C to form a precipitate showed considerable increase in hardness and fracture strength over unalloyed sapphire. It is suggested that propagation of a crack requires local plastic deformation and that precipitate particles interfere with local plastic deformation.
S. E. HSU, W. KOBES, M. E. FINE
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Phase chemistries in a precipitation-strengthened superalloy

Proceedings, annual meeting, Electron Microscopy Society of America, 1983
The majority of Ni-base superalloys are strengthened by precipitation of the γ' phase, which has a coherent ordered Ll2 structure based on Ni3(Al,Ti). However, a few superalloys, most notably Inconel 718, are strengthened instead by a γ" phase, which is a metastable coherent ordered DO22 precipitate with a tetragonal unit cell and nominal stoichiometry
E. L. Hall, Y. M. Kouh, K. M. Chang
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Modeling quenching of precipitation strengthened alloys

Products of precipitation strengthened alloys characteristically lose their ability to develop peak properties as the rate of the quench from the solution temperature is reduced. An analytical model was developed which improved on a previous model to predict mechanical properties of such materials from time-temperature-property, TTP, C-curves and a ...
James Thomas Staley, Roger D. Doherty
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Origin of strengthening on precipitation: Ordered particles

Acta Metallurgica, 1957
Abstract An analysis is given to show that the presence of order in precipitate particles can give rise to considerable strengthening even in the absence of strains. Some of the implications of this are given and systems which might owe their strength to this mechanism are discussed.
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Clustering, nano-scale precipitation and strengthening of steels

Progress in Materials Science, 2021
Zhi-ping Xiong, Ilana Timokhina
exaly  

Precipitation strengthening in Mg-Sn alloys with multiple precipitate types

Philosophical Magazine, 2022
Yang Lyu, Ian P. Jones, Yu-Lung Chiu
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