On the microstructure evolution and mechanical properties of the A390 alloy tubes produced via horizontal centrifugal casting

On the microstructure evolution and mechanical properties of the A390 alloy tubes produced via horizontal centrifugal casting

Three kinds of functionally graded tube using A390 alloy at various rotation speeds 400,700 and 1000 rpm with thickness of 2cm were produced by horizontal centrifugal casting, and their microstructure and mechanical properties were investigated and compared. Characteristics and distribution of the primary particles were assessed by the optical microscopy (OM), scanning electron microscopy (SEM), and image analyzer software. The hardness and pin-on-disk wear tests along the thickness of samples ...

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موضوع پایان نامه: Stress Evolution in Thin Films of a Polymer

موضوع پایان نامه: Stress Evolution in Thin Films of a Polymer

موضوع پایان نامه: Stress Evolution in Thin Films of a Polymerنویسنده :Anita Marie Bowlesسال :2006زبان : انگلیسیتعداد صفحات : 146حجم فایل :3.52 مگابایتفصلها:Introduction and BackgroundExperimental MethodsRoom Temperature Stress Development and Relaxation after Spin-CoatingData and Results:Stress Relaxation CGS System Detailsm-BOSS data analysis ...

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FREQUENCY AND DAMPING EVOLUTION DURING EXPERIMENTAL SEISMIC RESPONSE OF CIVIL ENGINEERING STRUCTURES

FREQUENCY AND DAMPING EVOLUTION DURING EXPERIMENTAL SEISMIC RESPONSE OF CIVIL ENGINEERING STRUCTURES

The results of the seismic tests on several reinforced-concrete shear walls and a four-storey frame are analysed in this paper. Each specimen was submitted to the action of a horizontal accelerogram, with successive growing amplitudes, using the pseudodynamic method. An analysis of the results allows knowing the evolution of the eigen frequency and damping ratio during the earthquakes thanks to an identification method working in the time domain. The method is formulated as a spatial model in ...

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