The effect of microstructure and strain rate on the room-temperature (RT) 700 °C compression deformation behavior a powder metallurgy processed ?-TiAl intermetallic alloy, Ti-45Al-2Nb-2Mn (at.%)-0.8 (vol%) TiB2, was investigated. Samples were heat-treated to obtain duplex two-phase ?2+? two nearly fully-lamellar microstructures with different lamellar spacings ?-phase volume fractions. Compress...

Scanning laser melting was employed to investigate directional solidification in Al–Cu thin films, 200 and 500 nm thick. The alloy with both eutectic hypoeutectic compositions, were co-deposited on fused silica substrates by magnetron sputtering. Melting of the films carried out air using a CW laser, as function scan velocity, v, up 5 cm/s. For regular lamellar microstructure observed over enti...

Abstract: A well-known challenge is to predict the transformations occurring during metal alloys welding aiming control weldment properties. Thus, this study presents a Thermo-Mechanical-Metallurgical model numerically thermal history, solid-state phase transformations, solidification microstructure and hardness distribution after of high strength low-alloy steels. The was implemented in an in-...

The successive ferrite (α) + pearlite (P) transformations from austenite (γ) have been modeled to predict the intervention of bainite in as-forged medium-carbon manganese steels. The kinetics of the diffusional transformations were calculated based on the classical nucleation-growth theory coupled with the CALPHAD multi-component thermodynamics. The description of growth rate of proeutectoid-α ...

The response of a strong bainitic–steel to tempering at high temperatures is investigated, because a softened state is sometimes necessary during the manufacture of engineering components, prior to the final heat–treatment which hardens the material. Thermodynamic calculations conducted to determine the maximum temperature at which the steel could be annealed without forming austenite were foun...

PURPOSE Congenital stromal corneal dystrophy (CSCD) is characterized by stromal opacities that morphologically are seen as interlamellar layers of amorphous substance with small filaments, the nature of which has hitherto been unknown. CSCD is associated with truncating mutations in the decorin gene (DCN). To understand the molecular basis for the corneal opacities we analyzed the expression of...

Addition of titanium (Ti) to ASTM A710 Grade B Cu-precipitation-strengthened steel significantly increases the impact absorbed fracture energy and reduces the ductile-to-brittle transition temperature. The effect of Ti correlates with the reduction of the amount of pearlite in the ferritic microstructure. A thorough study of the mechanical properties of Ti-modified A 710-B steel is presented.

Three new oribatid mite species of the superfamily Oppioidea--Cycloppia asetosa sp. nov., C. spindleformis sp. nov. and Hammerella (Hammerella) excisa sp. nov.--are described from India. The genus Cycloppia and subgenus Hammerella (Hammerella) are for the first time recorded in India. Cycloppia asetosa sp. nov. differs from all species of Cycloppia by the rostrum with indentation and the absenc...

Interlamellar plastic discs inserted into cat corneas provide a means by which segments of the cornea can be studied with regard to swelling and water movement in vivo. The corneas are physiologically normal as demonstrated by their transparency, swelling properties, and histologic structure. The observation that one disc causes no change in the hydration of the stroma anterior or posterior to ...

The syntheses, structures and magnetic properties of the coordination compounds of formula [FeIII(acac2-trien)][MnIICrIII(Cl2 An)3]·(CH3CN)2 (1), [FeIII(acac2-trien)][MnIICrIII(Br2An)3]·(CH3CN)2 (2) and [GaIII(acac2-trien)][MnIICrIII(Br2An)3]·(CH3CN)2 (3) are reported. They exhibit a 2D anionic network formed by Mn(ii) and Cr(iii) ions linked through anilate ligands, while the [FeIII(acac2-trie...