Shape memory effect associated with a deformation at a temperature just below A[sub S] in a Fe-Mn-Cr-Si-Ni shape memory alloy

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90090-6· OSTI ID:7108837

Federzoni, L; Guenin, G ^[1]

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1. G.E.M.P.P.M., Villeurbanne (France)

The shape memory effect of Fe-Mn based shape memory alloys is due to the formation of stress-induced [var epsilon]-martensite by deformation and to its reversion by heating over A[sub f], which permit it to recover a part of the original shape. The shape memory effect is directly associated with the [gamma][yields][var epsilon] transformation. For this reason, the authors have established the best conditions to induce the [var epsilon]-martensite inside an austenitic matrix: the deformation must take place at a temperature close to the M[sub s]. It has been established that a deformation made at a higher temperature degrades the shape memory effect. The purpose of this paper is to evaluate the shape memory effect in the case of a deformation applied at a relatively high temperature (just below A[sub s]) on samples containing a high volume fraction of [var epsilon]-martensite before the deformation. It is shown that an other mechanism of shape memory effect occurs in these conditions and allows to reach an interesting shape memory effect ([approximately]2%).

• OSTI ID: 7108837
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 31:1; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CRYSTAL-PHASE TRANSFORMATIONS
DATA
DEFORMATION
EXPERIMENTAL DATA
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ALLOYS
NICKEL ALLOYS
NUMERICAL DATA
PHASE TRANSFORMATIONS
SHAPE MEMORY EFFECT
SILICON ALLOYS