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Strength Behavior of Polycrystalline Alumina Subjected to Thermal Shock

D. P. H. Hasselman1970-09-01Journal of the American Ceramic Society

Theoretical predictions of crack propagation behavior in brittle solids under conditions of thermal shock were verified by water quenching of cylindrical polycrystalline alumina rods followed by strength testing. The calculated quenching temperature difference (Δ T O ) required to initiate thermal‐stress fracture agre…

Rock Mechanics and ModelingAdvanced ceramic materials synthesisHigh-Velocity Impact and Material Behavior

Study of (La1-xCax)MnO3. I. Magnetic Structure of LaMnO3

Gen Matsumoto1970-09-01Journal of the Physical Society of Japan

Magnetic properties of the perovskite-type oxide LaMnO 3 were studied in detail, experimentally and theoretically. The properly stoichiometric LaMnO 3 had a weak ferromagnetic moment in addition to the antiferromagnetic character with a Néel temperature of 141°K. It was found to be a parasitic weak ferromagnet. These…

Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsMultiferroics and related materials

On the Structure of Stress-Strain Relations for Time-Dependent Plastic Deformation in Metals

J. R. Rice1970-09-01Journal of Applied Mechanics

The paper is concerned with the structure of multiaxial stress-strain relations in time-dependent metal plasticity, as for transient creep and rate sensitive yielding. First, a general kinematical relation is developed between the macroscopic inelastic strain tensor and microstructural slip displacements, as modeled e…

High-Velocity Impact and Material BehaviorMicrostructure and mechanical propertiesMetallurgy and Material Forming