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Influence of quenching methods on martensitic transformation and mechanical properties of P/M processed Cu–Al–Ni–Ti shape memory alloys
Published in Taylor and Francis Ltd.
2016
Volume: 59
   
Issue: 4
Pages: 271 - 280
Abstract
The effect of quenching conditions on phase transformation characteristics and microstructural features of Cu–Al–Ni–Ti shape memory alloys (SMAs) have been studied. The alloys were synthesised via conventional powder metallurgy process using elemental metal powders. Four different quenching techniques, such as (a) two-step quenching, first to 100°C and then to 0°C; (b) two-step quenching, initially to 40°C and later to 0°C; (c) direct quenching to 40°C and (d) direct quenching to 0°C, were used. The microstructural features and phase transformations that the alloys had undergone were studied using FE-SEM and XRD techniques. The martensitic phase transformation analyses were carried out by differential scanning calorimeter while the mechanical properties were studied by microhardness and flexural bending tests. The results obtained clearly indicate that the quenching routes followed have a remarkable influence on the properties of Cu-based SMAs. © 2016 Institute of Materials, Minerals and Mining.
About the journal
JournalData powered by TypesetPowder Metallurgy
PublisherData powered by TypesetTaylor and Francis Ltd.
ISSN00325899
Open AccessNo
Concepts (26)
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    Aluminum
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    Bending strength
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    Bending tests
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    Differential scanning calorimetry
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    INTERMETALLICS
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    Martensite
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    Martensitic transformations
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    Mechanical properties
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    Metallurgy
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    Microstructural evolution
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    Nickel
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    Phase transitions
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    Powder metallurgy
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    Powder metals
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    Quenching
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    Shape memory effect
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    Titanium alloys
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    CU-BASED SHAPE MEMORY ALLOY
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    DIFFERENTIAL SCANNING CALORIMETERS
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    DIRECT-QUENCHING
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    ELEMENTAL METALS
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    MARTENSITIC PHASE TRANSFORMATIONS
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    Microstructural features
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    POWDER METALLURGY PROCESS
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    STEP QUENCHING
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    Copper alloys