E.C.BAIN'S IMPORTANT CONTRIBUTION TO X-RAY METALLOGRAPHY

Acta Metall Sin

1997, Vol. 33

Issue (1): 39-44 DOI:

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E.C.BAIN'S IMPORTANT CONTRIBUTION TO X-RAY METALLOGRAPHY

GUO Kexin (Shenyang Branch; Chinese Academy of Sciences; Shenyang 110015)

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GUO Kexin (Shenyang Branch; Chinese Academy of Sciences; Shenyang 110015). E.C.BAIN'S IMPORTANT CONTRIBUTION TO X-RAY METALLOGRAPHY. Acta Metall Sin, 1997, 33(1): 39-44.

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Abstract During 1921-1927, E.C.Bain made many important contributions to metallography by means of X-ray powder diffraction studies. He discovered the AuCu3 and Au3Cu superlattices, the face-centered structure of the Fe-Mn austenite, the Fe3W3C (or M6C) carbide in high-speed steels, and the Sigma phase in Cr-Ni stainless steels. Through a comprehensive study of the transformation of austenite, he proposed a crystallographic relationship (the Bain relationship) between austenite and martensite and developed the method to determine the amount of retained austenite by X-ray diffraction. This finally led him to study the isothermal transformation of austenite in 1930 and obtained a new transformation product at intermediate temperatures which was named Bainite after him. No doubt he was one of the pioneers in the development of X-ray metallography.

Key words: Bain X-ray metallography

Received: 18 January 1997

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