Dmitry Chernov

Dmitry Konstantinovich Chernov (or Tchernov, Russian: Дмитрий Константинович Чернов; November 1 [O.S. 1839] 1839 Saint-Petersburg - January 2, 1921 Yalta) was a Russian metallurgist. He is known by his discovery of polymorphous transformations in steel and the iron-carbon phase diagram. This discovery is the beginning of scientific metallography.