On the improvement of shape memory effect in Fe-16Mn-5Si-9Cr-4Ni alloys by thermomechanical treatment

Journal Article · Wed Jun 15 04:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90313-1· OSTI ID:7303392

Gu, Q; Humbeeck, J Van; Delaey, L ^[1]

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1. K.U. Leuven (Belgium.). Dept. of Metallurgy and Materials Engineering

The shape memory effect in Fe-Mn-Si alloys was discovered in the early 80's. Since then many efforts have been made in improving the shape memory effect in this alloy. Obtaining a shape memory strain up to 5% in order to get practical use is still an endeavor. Complete shape memory effect has been found both in single crystalline and in polycrystalline Fe-Mn-Si alloys, but as the prestrains in those investigations were quite small, the recoverable strain is limited to about 2%. Recently, Yang et al. obtained in Fe-29Mn-5.5Si-4.5Cr-2Ni-3.5Co (wt%) and Fe-13.7Mn-6Si-8.3Cr-4.9Ni (wt%) alloys over 5% reversible strain by applying 8% prestrain in a bending test. But till now a full recoverable strain is only obtained for a prestrain less than 2%. In the present study, the shape memory effect of an Fe-16Mn-5Si-9Cr-4Ni (wt%) alloy was tested. By applying the training treatment of 3--5% prestrain and 600 C annealing, a 3.5% recoverable strain can be reached in this alloy. Reasons for the improvement of the shape memory effect are proposed.

• OSTI ID: 7303392
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 30:12; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
CHROMIUM ALLOYS
DATA
EXPERIMENTAL DATA
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ALLOYS
MICROSTRUCTURE
NICKEL ALLOYS
NUMERICAL DATA
SHAPE MEMORY EFFECT
SILICON ALLOYS
STRAINS