کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1448048 | 988663 | 2009 | 11 صفحه PDF | دانلود رایگان |

Self-accommodation morphology of the α″α″ martensites in Ti–Nb shape memory alloys with Nb content ranging from 20 to 24 at.% was investigated. Hollow and solid triangular morphologies consisting of three α″α″ variants were found to be the α″α″ self-accommodation morphologies. The α″α″ variants are related to each other by twinning on {11¯1}α″. A V-shaped morphology consisting of two α″α″ variants coupled with a solid triangular morphology consisting of three α″α″ variants was found to be another type of self-accommodation morphology. The α″α″ variants from the V-shaped morphology are related by twinning on {111}α″, whereas the α″α″ variants from the solid triangular morphology are related to each other by twinning on {11¯1}α″. Pairs of crystallographically equivalent {11¯1}α″ twinning dislocations with steps of opposite signs were found to cause the overall orientation of the twinning terraces and steps to be parallel to the {11¯1}α″ twinning interface.
Journal: Acta Materialia - Volume 57, Issue 14, August 2009, Pages 4054–4064