The Influence of Thermal History on the Pseudoelasticity of Copperzinc Based Alloys and the Mechanical Behaviour of Martensite
Alloys exhibiting shape memory and pseudoelastic behaviours have many potential applications. A common feature amongst these alloys is that they all undergo a martensitic transformation either on cooling or under an applied stress. The alloys are thus characterized by certain parameters as Ms, the martensite transformation temperature on cooling, and σ T P−M , the critical stress needed for the transformation above Ms. The choice of the alloy depending on the specifics of use and the conditions of application are therefore dependent to a very large extent on the above mentioned parameters. The constancy of these parameters in a material under the influence of temperature and stresses during use is essential. Any changes otherwise would seriously alter the shape memory and/or the pseudoelastic recovery properties of the alloy and thereby affect the lifetime of the part or parts being used.
KeywordsShape Memory Thermal History Shape Memory Effect Antiphase Domain Shape Memory Behaviour
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