Deformation behavior of β1 phase in polycrystalline CuAlMnZnZr shape memory alloy with wide transformation hysteresis

Li, Z; Cao, Lingfei; Guo, Muxing; Tang, Ning; Fang, Mei; Liu, N

doi:10.1016/j.msea.2005.05.009

Cited by 3 publications

(2 citation statements)

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“…In many practical cases of application using shape memory alloys (SMAs), such as rivets, pipe connections, aeronautical industry devices, etc., it is necessary that the starting temperature of the martensitic transformation, M s , occur in bands temperature below 0 °C. However, due to the need for low temperatures (M s < 0 ºC), for these applications, the storage and installation of these devices must be carried out in cryogenic media, resulting in high cost of use 1,2,3 . One way to solve this problem would be to use alloys with a higher thermal hysteresis (difference between M s and A s temperatures).…”

Section: Introductionmentioning

confidence: 99%

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Influence of Mechanical Cycling on Residual Strain in Superelastic Cu-Al-Be-Nb Alloys

et al. 2019

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The understanding of the stabilization mechanism of martensite used to obtain alloys with high hysteresis and the possibility of recovering this martensite (residual strain) by heating at temperatures higher than A s and A f have been fundamental for application in bonding devices. One of the possibilities to enhance residual strain is through mechanical cycling. This work evaluated the influence of number of cycles and the effect of precipitation of Nb-rich particles as mechanisms to increase residual strain in superelastic Cu-Al-Be-Nb alloys. The results showed that the presence of Nb-rich precipitates was not a predominant factor for the enhancement of residual strain. In addition, mechanical cycling has proved to be an efficient mechanism for raising residual strain, and consequently increasing the amount of martensite retained. However, the gain of residual strain is accompanied by an increase of plastic deformation.

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Section: Introductionmentioning

confidence: 99%

“…al. 1 proposed that the stress induced transformation is accompanied by actual plastic deformation of the austenite phase. In this way, the elastic interfaces of martensite are seriously damaged and the transformation hysteresis increases.…”

Section: Introductionmentioning

confidence: 99%