Zur Metallographie des Roheisens,E.Heyn,O.Bauer,Stahl und Eisen, Vol.27 (1907), pp.1565-71+1621-25.
(About the metallography of cast iron.)
Notes:
In his earlier diagram (1904),Heyn assumed a zero % solution of graphite in the stable phase (at the solidus temperature). Heyn joints the view of Charpy and adapt his diagram.
From now on the iron-carbon double diagram is also known as the Heyn-charpy diagram.
