Aging-induced complex transformation behavior of martensite in   Ni57.5Mn17.5Ga25 shape memory alloy
  Ni57.5Mn17.5Ga25 shape memory alloy exhibits a complex transformation behavior, appearing after aging. Aging in the austenitic state resulted in an ordinary decrease of the martensitic transformation temperature. Contrary to this, aging in the martensitic state brought about unusual features of the martensitic transformation observed so far only in Ni-Ti alloys. 
V.V. Khovailo, R. Kainuma, T. Abe, K. Oikawa, and T. Takagi