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 1932 he undertook a type setting apprenticeship. In 1930 Walter Janka became an Organisation Leader, and then a Political leader of the Young Communists (KJVD / "Kommunistischer Jugendverband Deutschlands") for the Chemnitz sub-region. After his elder brother, , had been murdered by the Nazis, Walter himself was imprisoned by the Gestapo. He was remanded in custody in Chemnitz and in Freiburg before being convicted of preparing to commit high treason. After 1 years of imprisonment in Bautzen prison, he spent a six-month term in Sachsenburg concentration camp. Finally, in 1935 he was deported to Czechoslovakia. In 1936 Janka went to