It is shown that the ancient Damascus structure of a Persian blade differs in composition and nature of the separation of layers from the multilayer structure of contemporary welding Damascus steel. Structural analysis of the step-by-step transformation of the cellular distribution of excess carbides within separate layered conglomerates, represented by a genuine Damascus troostite-carbide structure (65/35), has been performed on Damascus steel. In specimens of contemporary welding Damascus steel a stepwise process has been performed for transformation of ferrite-pearlite (40/60) structures into ferrite-martensite (30/70) structures. Continuous ferritic layers are transformed into accumulations of isolated recrystallized ferritic grains. Values of threshold stress intensity coefficient (∆Kth) are determined graphically, with which a fatigue crack does not propagate over the extent of a prescribed number of cycles. A critical value is recorded for stress intensity coefficient (∆Kfc) with which knife blades are broken. Behavior of a kinetic diagram linear section of the kinetic fatigue failure diagram (KFFD) is evaluated. In welding Damascus steel over a linear section areas of delayed fatigue crack growth are observed due to local delamination ahead of its front.
Die im Laufe eines Jahres in der „adhäsion“ veröffentlichten Marktübersichten helfen Anwendern verschiedenster Branchen, sich einen gezielten Überblick über Lieferantenangebote zu verschaffen.