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martensitic transformation [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2006-07-10

English

Subject field(s)
  • Physics of Solids
DEF

A diffusionless solid-to-solid phase transition characterized by a rapid change of crystal structure, observed in metals, alloys, ceramics, and proteins.

OBS

Shape-memory alloys undergo a [martensitic] phase transition in their crystal structure when cooled from their stronger, higher temperature form in the austenitic phase to their weaker, lower temperature form in the martensitic phase.

OBS

In shape-memory alloys ... the microstructures formed upon cooling are easily manipulated by loads and disappear upon reheating, and the transformation is [almost perfectly] reversible [(and often termed "thermoelastic.")]

French

Domaine(s)
  • Physique des solides
CONT

[Les] propriétés [des alliages à mémoire de forme] sont contrôlées par une transformation structurale [sans diffusion et] réversible du premier ordre, la transformation martensitique thermoélastique entre l'austénite (phase haute température) et la martensite (phase basse température). [...] La transformation martensitique est induite aussi bien par un changement de température que sous l'effet d'une contrainte, que celle-ci soit externe ou interne.

Spanish

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Record 2 1993-12-16

English

Subject field(s)
  • Steel

French

Domaine(s)
  • Acier
DEF

Transformation qui apparaît au cours du refroidissement de certains alliages en donnant naissance à de la martensite. Cette transformation est essentiellement sans diffusion et athermique. Le taux d'avancement de la transformation n'est donc conditionné que par le niveau de température atteint au cours du refroidissement.

Spanish

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