In situ TEM observation of stress-induced martensitic transformations and twinning processes in CuAlNi single crystals

Topological Model of Austenite-Martensite Interfaces in Cu-Al-Ni Alloy

“…Besides, {101} A is the most dense plane in the bcc based DO 3 structure. However this is not the best choice because it obviously does not agree with the experimental results [2,3]. It is expected that the inclination of the habit plane from the terrace plane will be ≈ 10…”

“…However other planes of interfaces are also observed. The experimentally observed austeniteV 3 martensite planes are (7 13 9) A , (754) A , (331) A , (11 18 11) A , (254) A [2,3]. 3.…”

“…The experiments indicate that at interfaces between the austenite and a single variant of 2H martensite can exist on a microscopic scale [2]. Unfortunately, no invariant plane can be found for martensitic transformations in this material [3].…”

“…Let us limit our consideration to the boundary between austenite and V 3 variant of martensite [2]. The interfaces between austenite and other variants can be obtained from symmetry considerations.…”

“…The V 3 variant has the following orientation relationship to austenite: The type-I twinning is considered as LID deformation. The choice of this type of interface is motivated by the fact of suitable experimental results for comparison [2]. An example of experimental austenitemartensite interface is shown in Fig.…”