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
Les Janka Legislative and Public Affairs in 1974. He moved to the Pentagon in 1976 as Deputy Assistant Secretary of Defense for Near Eastern and African Affairs. Between 1978 and 1982, he worked for DGA International, a consultant assisting European corporations in marketing advanced military technology to the Pentagon. In 1984, after serving in the White House as Deputy Press Secretary for Foreign Affairs under President Ronald Reagan, he founded the Council for American-Saudi Dialogue, a foreign policy lobbying and public affairs consulting firm. Les Janka Leslie A. Janka is President-Saudi Arabia for Quincy International LLC, resident in Riyadh Saudi Arabia.. He