Belgian-born American metallurgist whose microscopic and photomicroscopic studies of metal structures make him one of the founders of physical metallurgy.

Sauveur emigrated to the United States and embarked on a career of metallurgic research that culminated in his appointment in 1924 as Gordon McKay professor of mining and metallurgy at Harvard University. Sauveur's work in heat treatment of metals is still regarded as a scientific landmark, and his book The Metallography and Heat Treatment of Iron and Steel (1912) had great influence in the field.