Hardness of dislocations, a particular metal's hardness can be controlled. Although seemingly counter-intuitive, as the density of dislocations increases, there are more intersections created and consequently more anchor points. Similarly, as more interstitial atoms are added, more pinning points that impede the movements of dislocations are formed. As a result, the more anchor points added, the harder the material will become. Hardness Hardness is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion. Some materials (e.g. metals) are harder than others (e.g. plastics, wood). Macroscopic hardness is generally characterized by strong intermolecular bonds, but
Walter Janka called upon to testify against Janka, with the words: Wolfgang Harich had already been convicted, and sentenced to a ten-year jail term in March 1957, in respect of the same alleged conspiracy as Janka. The two had previously worked together at the Aufbau publishing house. Harich was brought into the July show-trial by as a leading prosecution witness: his testimony now heavily implicated Janka. The two former friends would remain estranged from one another for the rest of their lives. Janka served the first part of his sentence in Berlin-Hohenschönhausen prison where he had been held on remand, but in