Phase selection during pulsed laser annealing of manganese

Pulsed (25 ns) laser-induced heating of the α phase of Mn is found to be sufficiently rapid to bypass solid-state transformation to the high-temperature β, γ, and δ allotropes and thus produce melts that are calculated to be undercooled by ∼120 K with respect to the equilibrium melting temperature o...

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Bibliographic Details
Published in:Applied physics letters 1986-02, Vol.48 (5), p.338-340
Main Authors: FOLLSTAEDT, D. M, PEERCY, P. S, PEREPEZKO, J. H
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Metals, semimetals and alloys
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Solidification
Specific materials
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Summary:Pulsed (25 ns) laser-induced heating of the α phase of Mn is found to be sufficiently rapid to bypass solid-state transformation to the high-temperature β, γ, and δ allotropes and thus produce melts that are calculated to be undercooled by ∼120 K with respect to the equilibrium melting temperature of the δ phase. Nucleation of the γ phase in this highly undercooled melt is observed for sufficiently long melt durations. The experiments thus demonstrate that pulsed laser-induced melting of metals with allotropes permits the study of nucleation and growth in highly undercooled melts with calculable temperatures.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.96544