Materials Literature
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Powders of the Al–Li and Al–Li–Fe alloys were produced by a centrifugal atomizing method, and the main structural characteristics of the powder particles were studied. We present a detailed description of the atomizing method, which was found to produce an appropriated distribution in size of the powder particles, for…
Selective pitting studies were used to determine environments likely to cause stress corrosion cracking (SCC) in Alloy 400. Slow strain rate tests were performed on waisted specimens, with solution composition and concentration, strain rate, grain size, and prior cold work as variables. It was found that environments…
The papers in this volume give a comprehensive review of the mechanical behaviour of new electromagnetic materials and their applications and discuss in detail their present and future roles. Containing contributions by outstanding experts the volume will be essential reading for all those involved in the areas of sup…
Relationship between sintering conditions and micro-hardness on fracture toughness were examined for fully densified silicon nitride ceramics, which were capsule-HIP sintered at temperatures between 1823 and 2023K under 60MPa for 1hour, Y2O3 and Al2O3 (in 6mol% in total) were used as additives. The micro hardness and…
Abstract The mechanism of cross‐linking of cellulose by glyoxal has been investigated using various alcohols as models for cellulose. Competitive hemiacetalizations of glyoxal show that vicinal diols are much more reactive than isolated alcohols. With a catalyst, both kinds of alcohols react with the hemiacetals, but…
The low temperature oxidation kinetics of SrTiO3-x were investigated by examining oxygen vacancy profiles photoelectrochemically. Surface exchange limited kinetics controlled reoxidation at damaged surfaces while bulk diffusion, characterized by an activation energy of 1.16 eV, controlled down to room temperature at e…
The storage performance from −16° to 25°C of a range of PR-1422 PR-1436G and PR-1750 two-part polysulfide aircraft sealants of A and B classes, packaged both in cans and injection kits, has been surveyed. Changes in viscosity of the base compound, cure rate, peel strength and application life were monitored over 36 mo…
Research Papers Analysis of Scuffing Temperatures With Considerations of Wear J. W. Kannel, J. W. Kannel Battelle Columbus Division, Columbus, Ohio 43201 Search for other works by this author on: This Site PubMed Google Scholar S. A. Barber S. A. Barber Battelle Columbus Division, Columbus, Ohio 43201 Search for other…
In order to clarify yarn motion in an interlacer, we take photographs of yarns during process by using a high-speed cine camera, input time series data of yarn positions to a microcomputer by using a digitizer and analyze them.Results obtained are as follows.(1) The position where opening part is processed is limited…
Description Temporarily out of stock; will ship by July 2011. This two-volume set is a collection of research results of radiation effects in structural materials and nuclear fuels. Complex topics are covered in detail with supporting evidence. Volume I — 50 papers on: microstructures; gas effects; radiation-induced s…
This study deals with nonlocal, homogeneous, isotropic, linear thermoelasticity. The field equations are introduced in a suitable form and a class of initial boundary-value problems is defined. A theorem of work and energy and a reciprocal theorem are generalized for the nonlocal case, and two variational principles c…
The economic life of airframes is largely determined by widespread initiation and growth of fatigue cracks at low stress intensities. Any factor reducing the low stress-intensity fatigue damage rate could, if controllable, increase the structural durability. One such factor is corrosion fatigue crack retardation and a…
High temperature IR spectroscopy is a rapid tool to identify morphological features,, at least qualitatively. This technique has been used in present work to study phase transitions, mesomorphous crystallinity, effect of branching, and effect of telogens, in both tubular and autoclave LDPE resins. With increasing temp…
Most electromagnetic field computation programs are generally able to take into account the characteristics of magnetic materials of two kinds: (1) materials with linear characteristics which may be isotropic and possibly with residual magnetization. (2) soft isotropic nonlinear materials. The implementation of these…
A new family of materials, nano-structure controlled(NANOCON) metals with very high resistivity of 1011Ωcm, has been developed. Nanocon metals compose with 95-99.5% metals and 0.5-5% dielectrics and have a porosity of less than 1%. Pure metal powders are coated with very thin dielectric films of an order of 10nm. Coat…
A novel impact bend test procedure is described for determining the dynamic fracture-initiation toughness, KId, at a loading rate KI of the order of 106MPa√m/s. The split Hopkinson pressure bar technique was used to measure dynamic loads applied to a fatigue-precracked bend specimen. The dynamic stress intensity facto…
The 57Fe Mössbauer spectroscopy has been used to study the liquid crystalline disubstituted derivatives of ferrocene (FLCn). Characteristic Debye temperatures, order parameters, intramolecualar and lattice contributions to the nuclear vibrational anisotropy have been obtained for these compounds and 7% (weight) soluti…
Complex material parameters (piezoelectric coefficient d31, elastic s11 E, and the dielectric constant K33) of the relaxor ferroelectric ceramic (1−x) Pb(Mg1/3Nb2/3)O3-xPbTiO3(x =.07) with 1% La (lanthanum) were measured as a function of bias field using a bar resonator. The values of the dielectric and piezoelectric…
Polymeric amines, containing the monomeric unit –CH2–CH2–NH– (PEI or LPEI). are versatile ligands, forming complexes in aqueous solutions with many labile metal ions, even at relatively low pH, due to the strong chelate effect. The mean distances between the metal centers within a polymer chain is small in solutions w…
F.c.c. metal single crystals are numerically modeled to simulate evolution of the deformation band. The models include simplified inhomogeneities in resistance to slip deformation. Slip deformation in the models is examined by a finite element method. Analysis results show that slip deformation of some part of the spe…