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1926 |
Structurally analogous alloy phases
W. Hume-Rothery shows that structurally analogous alloy
phases are characterized by a fixed ratio of the number of
valence electrons present.
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Feb 09, 1926 |
New aluminum alloy developed
R.L. Johnston, R.G. Archer, and Z. Jeffries, Alcoa, develop
an aluminum alloy, adapted for chill-casting, which
contains 3-10% silicon, 2-5% copper, and 15% or less zinc.
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Feb 09, 1926 |
Patent obtained for Ni-Cu-Al alloy
P.D. Merica, International Nickel, obtains a patent for
nickel-copper-aluminum alloy (the last up to 17%) suitable
for steam-turbine blades.
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Apr 27, 1926 |
Process for separating hafnium and zirconium halogenides described
A.E. Van Arkel and J.H. de Boer describe a process for
separating hafnium and zirconium halogenides by adding a
halogenide of an element of the fifth and sixth group to
the mixture and then performing a fractional distillation.
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May 1926 |
Martensite is body-centered tetragonal
W. Fink and E.D. Campbell, using X-ray measurements, show
that martensite is body-centered tetragonal.
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Jun 01, 1926 |
Studies on metals
D.J. McAdam Jr. discusses the results of studies on the
stress-strain cycle and corrosion-fatigue in metals.
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Jun 06, 1926 |
Zinc and magnesium hardening elements in aluminum
W. Sander and K.L. Meissner describe the use of zinc and
magnesium as hardening elements in heat-treated aluminum
alloys.
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Jun 16, 1926 |
Shear stress for one plane of atoms to slip should be 1/6 the shear modulus
J. Frenkel calculates that the shear stress required to
cause one plane of atoms to slip over an adjacent one
should be about one-sixth the shear modulus.
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Aug 01, 1926 |
Corrosion-resistant oxide coating for aluminum developed
G.D. Bengough and H. Sutton develop a corrosion-resistant
oxidecoating for aluminum.
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Sep 29, 1926 |
Metallic beryllium-alkali double fluorides prepared
W. Kroll prepares metallic beryllium-alkali double
fluorides by an alkali earth-metal (magnesium or lithium)
at temperatures about above 1000 degrees C.
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Oct 20, 1926 |
Perduren produced
J. Baer produces a rubber-like product ("Perduren") by
means of the reaction between alkali sulphides and
chlorohydrocarbons.
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Nov 01, 1926 |
Condensation products from formaldehyde and urea obtained
F. Pollack obtains condensation products from formaldehyde
and urea by reacting urea, etc., with formaldehyde (or a
polymer of it) in the presence of a base such as ammonia,
pyridine, or urea itself.
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Dec 28, 1926 |
Aluminum-copper-nickel alloy produced
W.A. Mudge, International Nickel, produces an aluminum-
copper-nickel alloy by adding an aluminum alloy such as 35-
85% aluminum, 45-10% nickel, 20-5% copper to a molten bath
consisting mainly of copper and nickel.
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1927 |
Alclad announced
E.H. Dix, Jr. of Alcoa makes the first public announcement
of Alclad, a new corrosion resistant aluminum product.
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Jan 19, 1927 |
Measurements of stressed tensile samples of aluminum
R.L. Aston reports measurements of stressed tensile samples
of aluminum showing that the strain indicated by relative
changes in lattice orientation is less near grain
boundaries than within the grain.
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Jan 21, 1927 |
Anilineformaldehyde resin condensation products are densified
Porous masses of anilineformaldehyde resin condensation
products are densified by the use of heat and pressure.
(Soc. Anon. pour l'Ind. chim. A Bale)
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Jan 29, 1927 |
Aniline-formaldehyde condensation products
Aniline-formaldehyde condensation products, formed in
presence of acid, are treated with a base to eliminate
acid. The result is a homogeneous, easily-worked product
which can be dried and compressed in molds. (Soc. Anon.
pour l'Ind. chim. a Bale)
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Mar 25, 1927 |
Heterogeneous metals are more liable to corrode
U.R. Evans observes that, speaking generally, the junction
of dissimilar metals often constitutes the seat of severe
corrosion, and that, on the whole, heterogeneous materials
are more liable to attack than homogeneous materials.
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Jun 01, 1927 |
Studies on corrosion-fatigue in nonferrous metals
D.J. McAdam Jr. discusses results of studies on corrosion-
fatigue limits and the relationship between fatigue and
corrosion-fatigue in nonferrous metals, especially nickel-
copper alloys and alloys of aluminum.
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Jul 1927 |
Practically pure vanadium obtained
J.W. Marden and M.N. Rich, Westinghouse, obtain practically
pure vanadium by the reduction of vanadium pentoxide with
metallic calcium in the presence of calcium chloride.
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