Journal
MATERIALS
Volume 16, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/ma16020645
Keywords
crystallization kinetics; atomic ordering; Ni-Co-Mn-In; magnetic shape memory alloys; mechanical alloying
Ask authors/readers for more resources
The crystallization kinetics and structure evolution during annealing of Ni45.5Co4.5Mn36.6In13.4 powders produced by mechanical alloying were investigated. After 70 h and 100 h of mechanical alloying, the powder consisted of a mixture of amorphous and nanocrystalline body-centered cubic (bcc) phases. Annealing above 440°C resulted in phase transformations and precipitation of different phases.
The crystallization kinetics and structure evolution during annealing of the Ni45.5Co4.5Mn36.6In13.4 (at. %) powders produced by mechanical alloying (MA) was investigated. After 70 h and 100 h of MA, the powder consisted of a mixture of amorphous and nanocrystalline body-centered cubic (bcc) phases. We observed the relaxation in the as-received powder. The relaxation temperature (T-re) increases logarithmically with the annealing time. Annealing above 440 degrees C results in (1) ordering of L2(1), (2) dissolution of the residual Ni and Mn, (3) tetragonal MnNi phase formation and (4) gamma phases precipitation. The activation energies of the B2 -> L2(1) and Mn (alpha-Mn) -> MnNi (P4/mmm) transformations were calculated.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available