Thermal arrest memory effect

Journal Article · Wed Jun 01 04:00:00 EDT 1994 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(94)90012-4· OSTI ID:7029506

Madangopal, K; Banerjee, S ^[1]; Lele, S ^[2]

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1. Bhabha Atomic Research Centre, Bombay (India). Metallurgy Division
2. Benaras Hindu Univ., Varanasi (India). Dept. of Metallurgical Engineering

The course of the martensitic transformation is affected by strain field in the untransformed parent phase. One of the consequences of this in Ni-Ti shape memory alloys is the Thermal Arrest Memory Effect (TAME), where the martensite to parent phase transformation remembers'' the temperature of arrest in the previous thermal cycle. From the results of the calorimetric investigations in this study, it is deduced that the TAME is the result of locked-in transformation strain energy in the self-accommodating martensitic microstructure. Thus it is found that on account of the large difference in the degree of self-accommodation achieved in the martensitic microstructures, TAME is observed to be significant in Ni-Ti and not in Cu-Zn-Al shape memory alloys.

• OSTI ID: 7029506
• Journal Information: Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 42:6; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
CALORIMETRY
COPPER ALLOYS
COPPER BASE ALLOYS
CRYSTAL-PHASE TRANSFORMATIONS
DATA
EXPERIMENTAL DATA
INFORMATION
MICROSTRUCTURE
NICKEL ALLOYS
NUMERICAL DATA
PHASE TRANSFORMATIONS
SHAPE MEMORY EFFECT
TITANIUM ALLOYS
ZINC ALLOYS