Microstructural influence of Mn additions on thermoelastic and pseudoelastic properties of Cu-Al-Ni alloys
- Univ. of Neuchatel (Switzerland). Inst. of Structural Metallurgy
The thermoelastic and mechanical properties of Cu-Al-Ni-B-Mn shape memory alloys have been studied as a function of manganese concentration and of heat treatment. Below a limiting value of manganese content, the loss of thermoelastic and pseudoelastic properties has been observed, in particular in the quenched specimens. The partial transformation and its degradation during thermal cycling observed in the low manganese content alloy has been attributed to the lower degree of B2 order achieved during the quench, leading to slower kinetics of DO[sub 3] ordering. The accommodation of strains between martensite variants and between the martensite/austenite phases appear to need dislocation accumulation at their interfaces. The presence of dislocations observed during the reverse transformation seem responsible for the degradation of the transformation and the loss of pseudoelastic properties of this alloy.
- OSTI ID:
- 5158165
- Journal Information:
- Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 42:5; ISSN 0956-7151; ISSN AMATEB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
BORON ADDITIONS
BORON ALLOYS
COPPER ALLOYS
DATA
DUCTILITY
ELASTICITY
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
MANGANESE
MANGANESE ALLOYS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
MICROSTRUCTURE
NICKEL ALLOYS
NUMERICAL DATA
PHYSICAL PROPERTIES
SHAPE MEMORY EFFECT
TENSILE PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
YIELD STRENGTH