Albert Marcel Germain René Portevin (1 November 1880 – 12 April 1962) was a French metallurgist who contributed to the development of chromium based stainless steels.
He was also involved in studies on tensile stress and deformation and the so-called Portevin–Le Chatelier effect is named after him and François Le Châtelier.
Portevin examined cooling curves for Cadmium Bismuth alloys and began to conduct thermal analysis to study shrinkage, brittleness and hardness.
He found ways to reduce the brittleness of stainless steels to make them amenable to production processes by studies on the transitions between martensite and austenite.
He was elected Foreign Member of the Royal Society in 1952 and made Grand Officier of the Legion d'Honneur in 1954.