Microstructure and precipitates in as-cast Co38Ni33Al29 shape memory alloy

作者：Bartova Barbora^*; Schryvers Dominye; Yang Zhiqing; Ignacova Silvia; Sittner Petr

来源：Scripta Materialia, 2007, 57(1): 37-40.

DOI：10.1016/j.scriptamat.2007.03.007

• shape memory alloys
• Co precipitates
• TEM

Conventional transmission electron microscopy (CTEM) and electron diffraction studies together with advanced microscopy techniques (high-resolution transmission electron microscopy (HRTEM) and energy-filtered transmission electron microscopy (EFTEM)) were carried out in order to characterize the microstructure of an as-east Co38Ni33Al29 shape memory alloy. Nanosized precipitates of face-centered cubic alpha-Co were observed in the specimen by means of CTEM, selected area diffraction and HRTEM. EFTEM measurements confirm that these precipitates are Co-rich. The orientation relationship between the largest precipitates and the B2 matrix is confirmed to be close to the Kurdjumow-Sachs orientation.

• 出版日期2007-7