Influence of the between-the-turns thermal insulation on the duty of a large, liquid-cooled pulsed coil

From fifth symposium on engineering problems of fusion research; Princeton, New Jersey, USA (6 Nov 1973). The moving cold front set up by good thermal insulation between the coil turns efficiently sweeps the heat from the conductor. A quantitative description of this effect is given. The toroidal field coils of the ORMAK machines are used as an example, but the discussion is applicable to any liquid-cooled coil made from hollow conductors. (MOW

A high temperature optical displacement measuring system

SIGLELD:8019.3153(PNR--90186) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Test of 6-inch-thick pressure vessels. Series 1: intermediate test vessels V-1 and V-2

The intermediate vessel tests have been subdivided into four seriesi flaws in cylindrical vessels, A508, class 2 forging steel-two vessels; flaws in cylindrical vessels with longitudinal weld seams, A508, class 2 forging steel, submerged-arc welds-three vessels; flaws in cylindrical vessels wlth longitudinal weld seams, A533, grade B, class l plate steel, submerged-arc weld-two vessels; and cylindrical vessels with radially attached nozzles, vessels of A508, chass 2 forging steel and A533, grade B, class 1 plate steel; nozzle of A508 class 2 forging steel-three vessels. A comprehensive description of the pertinent factors considered in the design of the vessels is presented. Construction of the test facility and documentation of test results and fracture predictions are included. Emphasis is placed on providing the test results in such a manner that they form a resource for amy investigators interested in the problem of fracture. (auth

Creep-constitutive behavior of Sn-3.8Ag-0.7Cu solder using an internal stress approach

The experimental tensile creep deformation of bulk Sn-3.8Ag-0.7Cu solder at temperatures between 263 K and 398 K, covering lifetimes up to 3,500 h, has been rationalized using constitutive equations that incorporate structure-related internal state variables. Primary creep is accounted for using an evolving internal back stress, due to the interaction between the soft matrix phase and a more creep-resistant particle phase. Steady-state creep is incorporated using a conventional power law, modified to include the steady-state value of internal stress. It is demonstrated that the observed behavior is well-fitted using creep constants for pure tin in the modified creep power law. A preliminary analysis of damage-induced tertiary creep is also presented