Understanding Solid–Solid（fcc→ω + bcc） Transition at Atomic Scale
来源期刊：Acta Metallurgica Sinica2015年第6期
论文作者：De-Hai Ping
文章页码：663 - 670
摘 要：An atomic transition model of a face-centered cubic（fcc） crystal to a primitive hexagonal x and body-centered cubic（bcc） structures has been crystallographically built. The fcc structure can transform into the x structure through a local shuffling or displacement of atoms about 0.4014 in iron for afcc iron= 3.59 . The bcc structure can form either after the x formation or concurrently by the similar mechanism, or the x structure can be treated as an intermediate stage during the transition of fcc→ω + bcc. Such a transition（fcc→ω + bcc transition） can be confirmed by Widmansta¨tten pattern formed in an iron meteorite, pearlitic structure and martensite composed of bcc-ferrite and ultra-fine x particles in iron–carbon steels. The present fcc–bcc orientation relationship matches with Pitsch’s one.
De-Hai Ping
National Institute for Materials Science
摘 要：An atomic transition model of a face-centered cubic（fcc） crystal to a primitive hexagonal x and body-centered cubic（bcc） structures has been crystallographically built. The fcc structure can transform into the x structure through a local shuffling or displacement of atoms about 0.4014 in iron for afcc iron= 3.59 . The bcc structure can form either after the x formation or concurrently by the similar mechanism, or the x structure can be treated as an intermediate stage during the transition of fcc→ω + bcc. Such a transition（fcc→ω + bcc transition） can be confirmed by Widmansta¨tten pattern formed in an iron meteorite, pearlitic structure and martensite composed of bcc-ferrite and ultra-fine x particles in iron–carbon steels. The present fcc–bcc orientation relationship matches with Pitsch’s one.
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