Strengthening Mechanism of Sintered and Heat-treated Compacts Made from Partially Prealloyed Steel Powders
نویسندگان
چکیده
منابع مشابه
Mechanical behaviour of pressed and sintered titanium alloys obtained from prealloyed and blended elemental powders.
The applicability of irregular prealloyed Ti-6Al-4V powder for the fabrication of titanium products by pressing and sintering and its employment as a master alloy to obtain the Ti-3Al-2.5V alloy was studied. To this end, the starting powders were characterised by dilatometry, differential thermal analysis and XRD. Green samples were obtained by cold uniaxial pressing, and the evolution of the m...
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Ambient hydrolysis products in moist air and hydrolysis kinetics in argon with humidity of RH1.5% for polycrystalline LiH powders and sintered bulks were investigated by X-ray diffraction, Raman spectroscopy and gravimetry. The results showed that the hydrolysis products made up a layered structure of LiOH•H2O/LiOH/Li2O from surface of the sample to inside. In low humid argon atmosphere, the pr...
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The Charpy energy of the sample after heat–treatment was significantly higher than the as–welded sample when the V–notches were located 1 or 3 mm away from FL. However, when the V–notch was located on FL, the improvement in toughness from the heat treatment was not so obvious with no enhancement noted for the test temperature of −40 ◦C. Under this condition, the facets of the fracture surface a...
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Porous materials are found in natural structures such as wood, bone, coral, cork and sponge and are synonymous with strong and lightweight structures. It is not surprising that manmade porous materials have followed and those made from polymers and ceramics have been widely exploited. The commercialisation of porous metals has lagged somewhat behind, but has received a boost following a surge i...
متن کاملEffective conductivity of partially sintered solids
An analytical model to predict the effective conductivity of a partially sintered solid is presented. It is based on an analysis of heat flow through a spherical particle embedded in a self-consistent matrix. Determination of the effective conductivity reduces to solving an integral equation, and a numerical solution of this equation is presented. In the limiting cases wherein the contact size ...
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ژورنال
عنوان ژورنال: Tetsu-to-Hagane
سال: 1993
ISSN: 0021-1575,1883-2954
DOI: 10.2355/tetsutohagane1955.79.8_1003