Abnormal grain growth in Fe-Mn-Al-Ni shape memory alloy with higher Al content

SCRIPTA MATERIALIA

卷:187

Article

Xia, Ji¹  Omori, Toshihiro¹  Kainuma, Ryosuke¹ 

[1] Tohoku Univ, Grad Sch Engn, Dept Mat Sci, Aoba Yama 6-6-02, Sendai, Miyagi 9808579, Japan

关键词: Abnormal grain growth;    Shape memory alloy;    Microstructure;    Superelasticity;   

DOI  :  10.1016/j.scriptamat.2020.06.044

来源: Elsevier

【 摘 要 】

The effect of Al content on the abnormal grain growth of Fe-Mn-Al-Ni shape memory alloy is investigated in comparison with the previously reported Fe-Mn-Al-Ni-Ti alloy. Microstructural observations revealed that compared with 1.5Ti, 17Al (adding 2 at.% Al to the conventional Fe-Mn-Al-Ni) showed the potential to grow into a large single crystal. The obtained results indicate that the size control of the second phase, which can be achieved not only by introducing Ti, but rather universally by stabilizing BCC phase, and the resultant subgrain structure are vital for abnormal grain growth. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free