Disk and Strip Forging for the Determination of Friction and Flow Strength Values
For forging operations, process parameters, such as workpiece geometry, forging load, and material properties of the deforming body, can all be measured by well-established techniques. Interface friction, however, is a far more elusive quantity, yet its significant role in determining forging forces and mode of material flow is well-recognized. Three new techniques are proposed to enable friction determination during forging. The first of these permits friction measurement over a small but finite increment of deformation; the second, removes the controversy over measuring geometry changes of a barreling surface and, therefore, provides for increase measurement accuracy; the third technique extends measurement to forging under plane strain conditions and introduces a new approach to the problem. The use of forging to measure flow stress and provide stress-strain data for the material being formed is discussed briefly.
B. Avitzur and R. A. Kohser, "Disk and Strip Forging for the Determination of Friction and Flow Strength Values," A S L E Transactions, vol. 21, no. 2, pp. 143-151, Taylor & Francis, Jan 1978.
The definitive version is available at https://doi.org/10.1080/05698197808982870
Materials Science and Engineering
Article - Journal
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