Sphere packings as a tool for the description of martensitic phase transformations

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• 作者：Heidrun Sowa
• 关键词：sphere packings ; martensitic transformations ; orientation relationships ; group&ndash ; subgroup relations
• 刊名：Acta Crystallographica Section A
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：73
• 期：1
• 页码：39-45
• 全文大小：1037K
• ISSN：1600-5724

文摘

Martensitic transformations which play an important role in metallurgical processes are analysed using group–subgroup relations and sphere-packing considerations. This approach is applied to the transformations between body-centred cubic (b.c.c.) and face-centred cubic (f.c.c.) phases and yields the orientation relations according to the Nishiyama–Wassermann, the Kurdjumov–Sachs and the Pitsch mechanisms. The models proposed by Pitsch and Schrader and by Burgers for the transition between b.c.c. and hexagonally closest-packed (h.c.p.) type structures can be interpreted analogously. In addition, two mechanisms for the transition between cubic f.c.c. and h.c.p. structures are described.