From Micro‐ to Macroplasticity

• DOI: 10.1002/adma.200600397
• Publication Date: 2006-06-21T11:26:44Z
• Authors: S. Brandstetter; H. Van Swygenhoven; S. Van Petegem; B. Schmitt; R. Maaß; P. M. Derlet
• Keywords: 02 engineering and technology; 0210 nano-technology

Therefore, macroplasticity theories based on amechanism involving long-range dislocation motion cannotserve to predict micro-yielding. In terms of measured stress–strain behavior, the two regimes are poorly distinguished,especially when they are characterized by positive strain-hard-ening, i.e., an increase in strength when the microstructure isstrained. To facilitate comparison of data, metallurgists havecome up with the rather arbitrary 0.2% definition of the mac-roscopic yield stress.