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- W2018303415 abstract "Two new test methods have been developed for determining the suitability of materials for bulk deformation processing such as rolling, forging or tube making. The tests can be performed on any compressive machine (press or hammer), using a pair of rectangular, opposing anvils of wa width and L lenght. In the “partial-width indentatin test” a work-piece of h = L thickness and w = wa + h width is indented, so that the material overhangs the anvils by b = h/2 on each side. On closing the material expelled from between them puts the “ribs” into secondary tension. After thinning down, materials of moderate ductility fracture, and the reduction in height is a measure of workability (and is about one half the reduction of area in the tension test). In the “secondary-tension test” holes are drilled in the slab, and the ribs thus formed are subjected to tension and, finally, fracture by the co-operating anvils. The reduction of area is a measure of work-ability (and agrees well with reduction of area in a plane-strain tension test). As a result of work described here, the test geometry has been standardized to give greatest sensitivity of measurement without undue sensitivity to unintentional variables. Experiments showed the suitability of these tests for evaluating workability for cold as well as hot working, and for studying the effects of inhomogeneities typical of as-cast structures, such as surface defects, segregation, coarse-grain effects and other variables beyond the reach of usual test methods. The simple tooling may be accommodated in production equipment, thus allowing investigations of workability at relevant temperatures and strain rates in an industrial or laboratory environment." @default.
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- W2018303415 modified "2023-09-27" @default.
- W2018303415 title "Development of new workability test techniques" @default.
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- W2018303415 doi "https://doi.org/10.1016/0378-3804(79)90005-6" @default.
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